[{"date_created":"2022-03-28T14:00:19Z","project":[{"_id":"130","grant_number":"418701707","name":"TRR 285: TRR 285"},{"_id":"132","name":"TRR 285 - B: TRR 285 - Project Area B"},{"_id":"141","name":"TRR 285 – B02: TRR 285 - Subproject B02"},{"name":"TRR 285 – A04: TRR 285 - Subproject A04","_id":"138"},{"_id":"131","name":"TRR 285 - A: TRR 285 - Project Area A"}],"status":"public","volume":883,"department":[{"_id":"630"}],"publication":"Key Engineering Materials","author":[{"first_name":"L.","full_name":"Ewenz, L.","last_name":"Ewenz"},{"last_name":"Kalich","full_name":"Kalich, J.","first_name":"J."},{"full_name":"Zimmermann, M.","first_name":"M.","last_name":"Zimmermann"},{"last_name":"Füssel","first_name":"U.","full_name":"Füssel, U."}],"user_id":"14931","title":"Effect of Different Tool Geometries on the Mechanical Properties of Al-Al Clinch Joints","abstract":[{"lang":"eng","text":"The use of clinch joints, e.g. vehicle structures, is determined by the reliability of the joint and its strength properties - in particular the fatigue strength. Clinch connections offer the advantage over form-closure and force-closure processes that they can also be used for hybrid material combinations. In order to be able to evaluate the influence of the geometry parameters such as e.g. undercut, neck thickness or also base thickness on the fatigue behavior, three clinch connections (in optimum and compromise design) with different tool parameters were designed and examined using the example of a joining task with aluminum sheet material. For this purpose, fatigue curves (F-N curves) in the range of high to very high numbers of load cycles (N = 105 to 107) were determined. In this load cycle range, a so-called \"neck fracture\" is mainly to be expected as the type of failure, whereas for quasi-static tests, a “buckling” is more likely to occur. The tests were carried out on single-cut overlapping shear tensile specimens. Metallographic and scanning electron microscopic examinations of the joints and the fracture surfaces served to identify the crack initiation site and to clarify the respective type of failure. Significant differences in the damage behaviour of the three clinching variants could be shown. This observation enables one step into the direction of fully understanding the relationship along the causal chain \"joint requirements - joining process - fatigue strength\". Thus the adaptability of the clinching process can be improved. "}],"language":[{"iso":"eng"}],"page":"65-72","citation":{"mla":"Ewenz, L., et al. “Effect of Different Tool Geometries on the Mechanical Properties of Al-Al Clinch Joints.” Key Engineering Materials, vol. 883, 2021, pp. 65–72, doi:10.4028/www.scientific.net/kem.883.65.","bibtex":"@article{Ewenz_Kalich_Zimmermann_Füssel_2021, title={Effect of Different Tool Geometries on the Mechanical Properties of Al-Al Clinch Joints}, volume={883}, DOI={10.4028/www.scientific.net/kem.883.65}, journal={Key Engineering Materials}, author={Ewenz, L. and Kalich, J. and Zimmermann, M. and Füssel, U.}, year={2021}, pages={65–72} }","chicago":"Ewenz, L., J. Kalich, M. Zimmermann, and U. Füssel. “Effect of Different Tool Geometries on the Mechanical Properties of Al-Al Clinch Joints.” Key Engineering Materials 883 (2021): 65–72. https://doi.org/10.4028/www.scientific.net/kem.883.65.","ama":"Ewenz L, Kalich J, Zimmermann M, Füssel U. Effect of Different Tool Geometries on the Mechanical Properties of Al-Al Clinch Joints. Key Engineering Materials. 2021;883:65-72. doi:10.4028/www.scientific.net/kem.883.65","apa":"Ewenz, L., Kalich, J., Zimmermann, M., & Füssel, U. (2021). Effect of Different Tool Geometries on the Mechanical Properties of Al-Al Clinch Joints. Key Engineering Materials, 883, 65–72. https://doi.org/10.4028/www.scientific.net/kem.883.65","ieee":"L. Ewenz, J. Kalich, M. Zimmermann, and U. Füssel, “Effect of Different Tool Geometries on the Mechanical Properties of Al-Al Clinch Joints,” Key Engineering Materials, vol. 883, pp. 65–72, 2021, doi: 10.4028/www.scientific.net/kem.883.65.","short":"L. Ewenz, J. Kalich, M. Zimmermann, U. Füssel, Key Engineering Materials 883 (2021) 65–72."},"year":"2021","type":"journal_article","doi":"10.4028/www.scientific.net/kem.883.65","intvolume":" 883","_id":"30663","date_updated":"2023-01-02T11:49:08Z"},{"title":"Modelling of thermally supported clinching of fibre-reinforced thermoplastics: Approaches on mesoscale considering large deformations and fibre failure","user_id":"14931","abstract":[{"lang":"eng","text":"Thermally supported clinching (Hotclinch) is a novel promising process to join dissimilar materials. Here, metal and fibre-reinforced thermoplastics (FRTP) are used within this single step joining process and without the usage of auxiliary parts like screws or rivets. For this purpose, heat is applied to improve the formability of the reinforced thermoplastic. This enables joining of the materials using conventional clinching-tools. Focus of this work is the modelling on mesoscopic scale for the numerical simulation of this process. The FTRP-model takes the material behaviour both of matrix and the fabric reinforced organo-sheet under process temperatures into account. For describing the experimentally observed phenomena such as large deformations, fibre failure and the interactions between matrix and fibres as well as between fibres themselves, the usage of conventional, purely Lagrangian based FEM methods is limited. Therefore, the combination of contact-models with advanced modelling approaches like Arbitrary-Lagrangian-Eulerian (ALE), Coupled-Eulerian-Lagrangian (CEL) and Smooth-ParticleHydrodynamics (SPH) for the numerical simulation of the clinching process are employed. The different approaches are compared with regard to simulation feasibility, robustness and results accuracy. It is shown, that the CEL approach represents the most promising approach to describe the clinching process. "}],"status":"public","project":[{"grant_number":"418701707","name":"TRR 285: TRR 285","_id":"130"},{"name":"TRR 285 - A: TRR 285 - Project Area A","_id":"131"},{"_id":"137","name":"TRR 285 – A03: TRR 285 - Subproject A03"}],"date_created":"2022-03-29T08:52:57Z","author":[{"first_name":"B.","full_name":"Gröger, B.","last_name":"Gröger"},{"full_name":"Hornig, A.","first_name":"A.","last_name":"Hornig"},{"first_name":"A.","full_name":"Hoog, A.","last_name":"Hoog"},{"full_name":"Gude, M.","first_name":"M.","last_name":"Gude"}],"department":[{"_id":"630"}],"publication":"ESAFORM 2021 - 24th International Conference on Material Forming","doi":"10.25518/esaform21.4293","date_updated":"2023-01-02T11:50:35Z","_id":"30688","type":"journal_article","citation":{"mla":"Gröger, B., et al. “Modelling of Thermally Supported Clinching of Fibre-Reinforced Thermoplastics: Approaches on Mesoscale Considering Large Deformations and Fibre Failure.” ESAFORM 2021 - 24th International Conference on Material Forming, 2021, doi:10.25518/esaform21.4293.","bibtex":"@article{Gröger_Hornig_Hoog_Gude_2021, title={Modelling of thermally supported clinching of fibre-reinforced thermoplastics: Approaches on mesoscale considering large deformations and fibre failure}, DOI={10.25518/esaform21.4293}, journal={ESAFORM 2021 - 24th International Conference on Material Forming}, author={Gröger, B. and Hornig, A. and Hoog, A. and Gude, M.}, year={2021} }","apa":"Gröger, B., Hornig, A., Hoog, A., & Gude, M. (2021). Modelling of thermally supported clinching of fibre-reinforced thermoplastics: Approaches on mesoscale considering large deformations and fibre failure. ESAFORM 2021 - 24th International Conference on Material Forming. https://doi.org/10.25518/esaform21.4293","ama":"Gröger B, Hornig A, Hoog A, Gude M. Modelling of thermally supported clinching of fibre-reinforced thermoplastics: Approaches on mesoscale considering large deformations and fibre failure. ESAFORM 2021 - 24th International Conference on Material Forming. Published online 2021. doi:10.25518/esaform21.4293","chicago":"Gröger, B., A. Hornig, A. Hoog, and M. Gude. “Modelling of Thermally Supported Clinching of Fibre-Reinforced Thermoplastics: Approaches on Mesoscale Considering Large Deformations and Fibre Failure.” ESAFORM 2021 - 24th International Conference on Material Forming, 2021. https://doi.org/10.25518/esaform21.4293.","ieee":"B. Gröger, A. Hornig, A. Hoog, and M. Gude, “Modelling of thermally supported clinching of fibre-reinforced thermoplastics: Approaches on mesoscale considering large deformations and fibre failure,” ESAFORM 2021 - 24th International Conference on Material Forming, 2021, doi: 10.25518/esaform21.4293.","short":"B. Gröger, A. Hornig, A. Hoog, M. Gude, ESAFORM 2021 - 24th International Conference on Material Forming (2021)."},"year":"2021","language":[{"iso":"eng"}]},{"abstract":[{"text":"Joints are an essential part of modern (lightweight) structures in a broad variety of applications. The reason for this is the rapidly increasing number of different material combinations needing to be joined in application areas like the automotive industry. It is currently common to use numerous auxiliary or standardized elements instead of individually adapted joining elements. This leads to a large number of different joining elements per product and thus to high costs. An innovative approach to overcoming this issue is the design, manufacture and setting of joint-specific joining elements. A good candidate for the manufacture of adapted joining elements of this type is the so-called friction spinning process. The joining elements formed in this way can be specifically adapted to the application in question in terms of both shape and mechanical properties. The part geometry required for the properties of a given joint is formed using a universal forming tool. This makes it possible to form a wide variety of sub geometries for the auxiliary joining part as a function of the prevailing joint condition, using a single forming tool and starting from the same semi-finished bar material. By applying different process strategies for the rotational speed and feed rate during the forming operation, the same part geometry can even be given different local mechanical properties. The following contribution presents the results of ongoing research work and includes the process concept, process properties, tooling and the results of experimental investigations into the joining of two sheet metal parts with help of this new joining process.","lang":"eng"}],"title":"Development of a novel adaptive joining technology employing friction-spun joint connectors (FSJC)","user_id":"14931","author":[{"last_name":"Wiens","full_name":"Wiens, E.","first_name":"E."},{"full_name":"Wischer, C.","first_name":"C.","last_name":"Wischer"},{"first_name":"W.","full_name":"Homberg, W.","last_name":"Homberg"}],"department":[{"_id":"630"}],"publication":"ESAFORM","status":"public","date_created":"2022-03-29T08:49:33Z","project":[{"grant_number":"418701707","name":"TRR 285: TRR 285","_id":"130"},{"name":"TRR 285 - C: TRR 285 - Project Area C","_id":"133"},{"name":"TRR 285 – C03: TRR 285 - Subproject C03","_id":"147"}],"date_updated":"2023-01-02T11:49:31Z","_id":"30685","doi":"10.25518/esaform21.4682","type":"journal_article","citation":{"short":"E. Wiens, C. Wischer, W. Homberg, ESAFORM (2021) 4682.","ieee":"E. Wiens, C. Wischer, and W. Homberg, “Development of a novel adaptive joining technology employing friction-spun joint connectors (FSJC),” ESAFORM, p. 4682, 2021, doi: 10.25518/esaform21.4682.","chicago":"Wiens, E., C. Wischer, and W. Homberg. “Development of a Novel Adaptive Joining Technology Employing Friction-Spun Joint Connectors (FSJC).” ESAFORM, 2021, 4682. https://doi.org/10.25518/esaform21.4682.","apa":"Wiens, E., Wischer, C., & Homberg, W. (2021). Development of a novel adaptive joining technology employing friction-spun joint connectors (FSJC). ESAFORM, 4682. https://doi.org/10.25518/esaform21.4682","ama":"Wiens E, Wischer C, Homberg W. Development of a novel adaptive joining technology employing friction-spun joint connectors (FSJC). ESAFORM. Published online 2021:4682. doi:10.25518/esaform21.4682","mla":"Wiens, E., et al. “Development of a Novel Adaptive Joining Technology Employing Friction-Spun Joint Connectors (FSJC).” ESAFORM, 2021, p. 4682, doi:10.25518/esaform21.4682.","bibtex":"@article{Wiens_Wischer_Homberg_2021, title={Development of a novel adaptive joining technology employing friction-spun joint connectors (FSJC)}, DOI={10.25518/esaform21.4682}, journal={ESAFORM}, author={Wiens, E. and Wischer, C. and Homberg, W.}, year={2021}, pages={4682} }"},"year":"2021","page":"4682","language":[{"iso":"eng"}]},{"author":[{"full_name":"Harzheim, S.","first_name":"S.","last_name":"Harzheim"},{"full_name":"Steinfelder, C.","first_name":"C.","last_name":"Steinfelder"},{"first_name":"T.","full_name":"Wallmersperger, T.","last_name":"Wallmersperger"},{"last_name":"Brosius","first_name":"A.","full_name":"Brosius, A."}],"department":[{"_id":"630"}],"publication":"Key Engineering Materials","volume":883,"status":"public","date_created":"2022-03-28T14:04:56Z","project":[{"name":"TRR 285: TRR 285","grant_number":"418701707","_id":"130"},{"name":"TRR 285 - B: TRR 285 - Project Area B","_id":"132"},{"_id":"142","name":"TRR 285 – B03: TRR 285 - Subproject B03"},{"_id":"140","name":"TRR 285 – B01: TRR 285 - Subproject B01"}],"abstract":[{"text":"Corrosion is a major cause for the failure of metallic components in various branches of the industry. Depending on the corrosion severity, the time until failure of the component varies. On the contrary, a study has shown that certain riveted metal joints, exposed to a short period of mechanical loading and corrosion, have greater fatigue limits. This study gives rise to the question how different corrosion exposure times affect joint metallic components. In the present research, a theoretical approach is developed in order to evaluate the influence of galvanic corrosion on joint integrity of clinched metal joints. At first, the framework for modeling galvanic corrosion is introduced. Furthermore, a simulative investigation of a clinching point is carried out based on the assumption that corrosion leads to a reduction of the contact area which leads to a local increase in contact pressure. For this purpose, the stiffness values of individual elements in a finite element model are reduced locally in the contact area of the undercut and the contact stress along a path is evaluated. Summarizing, a modeling approach is introduced to investigate corrosion effects on load-bearing behavior of clinched joints. ","lang":"eng"}],"title":"A First Approach for the Treatment of Galvanic Corrosion and of Load-Bearing Capacity of Clinched Joints","user_id":"14931","year":"2021","type":"journal_article","citation":{"mla":"Harzheim, S., et al. “A First Approach for the Treatment of Galvanic Corrosion and of Load-Bearing Capacity of Clinched Joints.” Key Engineering Materials, vol. 883, 2021, pp. 97–104, doi:10.4028/www.scientific.net/kem.883.97.","bibtex":"@article{Harzheim_Steinfelder_Wallmersperger_Brosius_2021, title={A First Approach for the Treatment of Galvanic Corrosion and of Load-Bearing Capacity of Clinched Joints}, volume={883}, DOI={10.4028/www.scientific.net/kem.883.97}, journal={Key Engineering Materials}, author={Harzheim, S. and Steinfelder, C. and Wallmersperger, T. and Brosius, A.}, year={2021}, pages={97–104} }","chicago":"Harzheim, S., C. Steinfelder, T. Wallmersperger, and A. Brosius. “A First Approach for the Treatment of Galvanic Corrosion and of Load-Bearing Capacity of Clinched Joints.” Key Engineering Materials 883 (2021): 97–104. https://doi.org/10.4028/www.scientific.net/kem.883.97.","ama":"Harzheim S, Steinfelder C, Wallmersperger T, Brosius A. A First Approach for the Treatment of Galvanic Corrosion and of Load-Bearing Capacity of Clinched Joints. Key Engineering Materials. 2021;883:97-104. doi:10.4028/www.scientific.net/kem.883.97","apa":"Harzheim, S., Steinfelder, C., Wallmersperger, T., & Brosius, A. (2021). A First Approach for the Treatment of Galvanic Corrosion and of Load-Bearing Capacity of Clinched Joints. Key Engineering Materials, 883, 97–104. https://doi.org/10.4028/www.scientific.net/kem.883.97","ieee":"S. Harzheim, C. Steinfelder, T. Wallmersperger, and A. Brosius, “A First Approach for the Treatment of Galvanic Corrosion and of Load-Bearing Capacity of Clinched Joints,” Key Engineering Materials, vol. 883, pp. 97–104, 2021, doi: 10.4028/www.scientific.net/kem.883.97.","short":"S. Harzheim, C. Steinfelder, T. Wallmersperger, A. Brosius, Key Engineering Materials 883 (2021) 97–104."},"page":"97-104","language":[{"iso":"eng"}],"_id":"30664","intvolume":" 883","date_updated":"2023-01-02T11:49:52Z","doi":"10.4028/www.scientific.net/kem.883.97"},{"doi":"10.4028/www.scientific.net/KEM.883.57","date_updated":"2023-01-02T11:50:57Z","_id":"30694","page":"57","citation":{"short":"J. Friedlein, J. Mergheim, P. Steinmann, Key Engineering Materials 883 KEM (2021) 57.","ieee":"J. Friedlein, J. Mergheim, and P. Steinmann, “A finite plasticity gradient-damage model for sheet metals during forming and clinching,” Key Engineering Materials, vol. 883 KEM, p. 57, 2021, doi: 10.4028/www.scientific.net/KEM.883.57.","ama":"Friedlein J, Mergheim J, Steinmann P. A finite plasticity gradient-damage model for sheet metals during forming and clinching. Key Engineering Materials. 2021;883 KEM:57. doi:10.4028/www.scientific.net/KEM.883.57","apa":"Friedlein, J., Mergheim, J., & Steinmann, P. (2021). A finite plasticity gradient-damage model for sheet metals during forming and clinching. Key Engineering Materials, 883 KEM, 57. https://doi.org/10.4028/www.scientific.net/KEM.883.57","chicago":"Friedlein, J., J. Mergheim, and P. Steinmann. “A Finite Plasticity Gradient-Damage Model for Sheet Metals during Forming and Clinching.” Key Engineering Materials 883 KEM (2021): 57. https://doi.org/10.4028/www.scientific.net/KEM.883.57.","mla":"Friedlein, J., et al. “A Finite Plasticity Gradient-Damage Model for Sheet Metals during Forming and Clinching.” Key Engineering Materials, vol. 883 KEM, 2021, p. 57, doi:10.4028/www.scientific.net/KEM.883.57.","bibtex":"@article{Friedlein_Mergheim_Steinmann_2021, title={A finite plasticity gradient-damage model for sheet metals during forming and clinching}, volume={883 KEM}, DOI={10.4028/www.scientific.net/KEM.883.57}, journal={Key Engineering Materials}, author={Friedlein, J. and Mergheim, J. and Steinmann, P.}, year={2021}, pages={57} }"},"year":"2021","type":"journal_article","language":[{"iso":"eng"}],"title":"A finite plasticity gradient-damage model for sheet metals during forming and clinching","user_id":"14931","abstract":[{"text":"In recent years, clinching has gathered popularity to join sheets of different materials in industrial applications. The manufacturing process has some advantages, as reduced joining time, reduced costs, and the joints show good fatigue properties. To ensure the joint strength, reliable simulations of the material behaviour accounting for process-induced damage are expected to be beneficial to obtain credible values for the ultimate joint strength and its fatigue limit. A finite plasticity gradient-damage material model is outlined to describe the plastic and damage evolutions during the forming of sheet metals, later applied to clinching. The utilised gradient-enhancement cures the damage-induced localisation by introducing a global damage variable as an additional finite element field. Both, plasticity and damage are strongly coupled, but can, due to a dual-surface approach, evolve independently. The ability of the material model to predict damage in strongly deformed sheets, its flexibility and its regularization properties are illustrated by numerical examples.","lang":"eng"}],"volume":"883 KEM","project":[{"_id":"130","name":"TRR 285: TRR 285","grant_number":"418701707"},{"name":"TRR 285 - A: TRR 285 - Project Area A","_id":"131"},{"name":"TRR 285 – A05: TRR 285 - Subproject A05","_id":"139"}],"date_created":"2022-03-29T09:08:21Z","status":"public","department":[{"_id":"630"}],"publication":"Key Engineering Materials","author":[{"first_name":"J.","full_name":"Friedlein, J.","last_name":"Friedlein"},{"first_name":"J.","full_name":"Mergheim, J.","last_name":"Mergheim"},{"full_name":"Steinmann, P.","first_name":"P.","last_name":"Steinmann"}]},{"user_id":"14931","title":"Temperature dependent modelling of fibre-reinforced thermoplastic organo-sheet material for forming and joining process simulations","abstract":[{"lang":"eng","text":"Joining and local forming processes for fibre-reinforced thermoplastics (FRTP) like hole-forming or variations of the clinching process require an in-depth understanding of the process induced effects on meso-scale. For numerical modelling with a geometrical description of a woven fabric, adequate material models for a representative unit cell are identified. Model calibration is achieved employing a mesoscopic finite-element-approach using the embedded element method based on tensile tests of the consolidated organo-sheets and a phenomenological evaluation of photomicrographs. The model takes temperature dependent stiffness and fibre tension failure into account. "}],"status":"public","date_created":"2022-03-29T08:54:24Z","project":[{"_id":"130","grant_number":"418701707","name":"TRR 285: TRR 285"},{"name":"TRR 285 - A: TRR 285 - Project Area A","_id":"131"},{"name":"TRR 285 – A03: TRR 285 - Subproject A03","_id":"137"}],"volume":"883 KEM","author":[{"last_name":"Gröger","full_name":"Gröger, B.","first_name":"B."},{"full_name":"Hornig, A.","first_name":"A.","last_name":"Hornig"},{"first_name":"A.","full_name":"Hoog, A.","last_name":"Hoog"},{"first_name":"M.","full_name":"Gude, M.","last_name":"Gude"}],"publication":"Key Engineering Materials","department":[{"_id":"630"}],"doi":"10.4028/www.scientific.net/KEM.883.49","date_updated":"2023-01-02T11:51:23Z","_id":"30689","language":[{"iso":"eng"}],"type":"journal_article","citation":{"ieee":"B. Gröger, A. Hornig, A. Hoog, and M. Gude, “Temperature dependent modelling of fibre-reinforced thermoplastic organo-sheet material for forming and joining process simulations,” Key Engineering Materials, vol. 883 KEM, p. 49, 2021, doi: 10.4028/www.scientific.net/KEM.883.49.","short":"B. Gröger, A. Hornig, A. Hoog, M. Gude, Key Engineering Materials 883 KEM (2021) 49.","bibtex":"@article{Gröger_Hornig_Hoog_Gude_2021, title={Temperature dependent modelling of fibre-reinforced thermoplastic organo-sheet material for forming and joining process simulations}, volume={883 KEM}, DOI={10.4028/www.scientific.net/KEM.883.49}, journal={Key Engineering Materials}, author={Gröger, B. and Hornig, A. and Hoog, A. and Gude, M.}, year={2021}, pages={49} }","mla":"Gröger, B., et al. “Temperature Dependent Modelling of Fibre-Reinforced Thermoplastic Organo-Sheet Material for Forming and Joining Process Simulations.” Key Engineering Materials, vol. 883 KEM, 2021, p. 49, doi:10.4028/www.scientific.net/KEM.883.49.","apa":"Gröger, B., Hornig, A., Hoog, A., & Gude, M. (2021). Temperature dependent modelling of fibre-reinforced thermoplastic organo-sheet material for forming and joining process simulations. Key Engineering Materials, 883 KEM, 49. https://doi.org/10.4028/www.scientific.net/KEM.883.49","ama":"Gröger B, Hornig A, Hoog A, Gude M. Temperature dependent modelling of fibre-reinforced thermoplastic organo-sheet material for forming and joining process simulations. Key Engineering Materials. 2021;883 KEM:49. doi:10.4028/www.scientific.net/KEM.883.49","chicago":"Gröger, B., A. Hornig, A. Hoog, and M. Gude. “Temperature Dependent Modelling of Fibre-Reinforced Thermoplastic Organo-Sheet Material for Forming and Joining Process Simulations.” Key Engineering Materials 883 KEM (2021): 49. https://doi.org/10.4028/www.scientific.net/KEM.883.49."},"year":"2021","page":"49"},{"department":[{"_id":"630"}],"publication":"PAMM","author":[{"first_name":"M.","full_name":"Hofmann, M.","last_name":"Hofmann"},{"last_name":"Shi","first_name":"Y.","full_name":"Shi, Y."},{"last_name":"Wallmersperger","full_name":"Wallmersperger, T.","first_name":"T."}],"volume":20,"project":[{"_id":"130","grant_number":"418701707","name":"TRR 285: TRR 285"},{"_id":"132","name":"TRR 285 - B: TRR 285 - Project Area B"},{"_id":"142","name":"TRR 285 – B03: TRR 285 - Subproject B03"}],"date_created":"2022-03-29T10:36:29Z","status":"public","abstract":[{"lang":"eng","text":"Predicting the durability of components under mechanical loading combined with environmental conditions leading to corrosion is one of the most challenging tasks in mechanical engineering. Precise predictions are neccesary for lightweight design in transportation due to environmental protection. During corrosion often hydrogen is produced by electrochemical reactions. Hydrogen embrittlement is one of the most feared damage mechanisms for metal constructions leading to early and unexpected failure. Until now predictions are mostly done through costly experiments. In the present research, a first simple simulation model based on the fundamentals of electrochemistry and continuum damage mechanics is developed to couple the damage induced by the mechanical stress with the hydrogen embrittlement. Results of the durability are presented for the case of uniaxial cyclic loading for varying testing frequency."}],"title":"A first Model of Fatigue Corrosion of a Metal through Hydrogen Embrittlement","user_id":"14931","type":"journal_article","citation":{"short":"M. Hofmann, Y. Shi, T. Wallmersperger, PAMM 20 (2021).","ieee":"M. Hofmann, Y. Shi, and T. Wallmersperger, “A first Model of Fatigue Corrosion of a Metal through Hydrogen Embrittlement,” PAMM, vol. 20, 2021, doi: 10.1002/pamm.202000122.","chicago":"Hofmann, M., Y. Shi, and T. Wallmersperger. “A First Model of Fatigue Corrosion of a Metal through Hydrogen Embrittlement.” PAMM 20 (2021). https://doi.org/10.1002/pamm.202000122.","ama":"Hofmann M, Shi Y, Wallmersperger T. A first Model of Fatigue Corrosion of a Metal through Hydrogen Embrittlement. PAMM. 2021;20. doi:10.1002/pamm.202000122","apa":"Hofmann, M., Shi, Y., & Wallmersperger, T. (2021). A first Model of Fatigue Corrosion of a Metal through Hydrogen Embrittlement. PAMM, 20. https://doi.org/10.1002/pamm.202000122","mla":"Hofmann, M., et al. “A First Model of Fatigue Corrosion of a Metal through Hydrogen Embrittlement.” PAMM, vol. 20, 2021, doi:10.1002/pamm.202000122.","bibtex":"@article{Hofmann_Shi_Wallmersperger_2021, title={A first Model of Fatigue Corrosion of a Metal through Hydrogen Embrittlement}, volume={20}, DOI={10.1002/pamm.202000122}, journal={PAMM}, author={Hofmann, M. and Shi, Y. and Wallmersperger, T.}, year={2021} }"},"year":"2021","language":[{"iso":"eng"}],"date_updated":"2023-01-02T11:50:14Z","_id":"30720","intvolume":" 20","doi":"10.1002/pamm.202000122"},{"doi":"10.4028/www.scientific.net/KEM.883.105","_id":"30695","date_updated":"2023-01-02T11:51:41Z","citation":{"ieee":"C. Zirngibl and B. Schleich, “Approach for the automated analysis of geometrical clinch joint characteristics,” Key Engineering Materials, vol. 883 KEM, p. 105, 2021, doi: 10.4028/www.scientific.net/KEM.883.105.","short":"C. Zirngibl, B. Schleich, Key Engineering Materials 883 KEM (2021) 105.","bibtex":"@article{Zirngibl_Schleich_2021, title={Approach for the automated analysis of geometrical clinch joint characteristics}, volume={883 KEM}, DOI={10.4028/www.scientific.net/KEM.883.105}, journal={Key Engineering Materials}, author={Zirngibl, C. and Schleich, B.}, year={2021}, pages={105} }","mla":"Zirngibl, C., and B. Schleich. “Approach for the Automated Analysis of Geometrical Clinch Joint Characteristics.” Key Engineering Materials, vol. 883 KEM, 2021, p. 105, doi:10.4028/www.scientific.net/KEM.883.105.","chicago":"Zirngibl, C., and B. Schleich. “Approach for the Automated Analysis of Geometrical Clinch Joint Characteristics.” Key Engineering Materials 883 KEM (2021): 105. https://doi.org/10.4028/www.scientific.net/KEM.883.105.","ama":"Zirngibl C, Schleich B. Approach for the automated analysis of geometrical clinch joint characteristics. Key Engineering Materials. 2021;883 KEM:105. doi:10.4028/www.scientific.net/KEM.883.105","apa":"Zirngibl, C., & Schleich, B. (2021). Approach for the automated analysis of geometrical clinch joint characteristics. Key Engineering Materials, 883 KEM, 105. https://doi.org/10.4028/www.scientific.net/KEM.883.105"},"year":"2021","type":"journal_article","page":"105","language":[{"iso":"eng"}],"title":"Approach for the automated analysis of geometrical clinch joint characteristics","user_id":"14931","abstract":[{"lang":"eng","text":"Due to their cost-efficiency and environmental friendliness, the demand of mechanical joining processes is constantly rising. However, the dimensioning and design of joints and suitable processes are mainly based on expert knowledge and few experimental data. Therefore, the performance of numerical and experimental studies enables the generation of optimized joining geometries. However, the manual evaluation of the results of such studies is often highly time-consuming. As a novel solution, image segmentation and machine learning algorithm provide methods to automate the analysis process. Motivated by this, the paper presents an approach for the automated analysis of geometrical characteristics using clinching as an example. "}],"volume":"883 KEM","status":"public","date_created":"2022-03-29T09:09:51Z","project":[{"name":"TRR 285 – B05: TRR 285 - Subproject B05","_id":"144"},{"_id":"130","grant_number":"418701707","name":"TRR 285: TRR 285"},{"name":"TRR 285 - B: TRR 285 - Project Area B","_id":"132"}],"author":[{"last_name":"Zirngibl","first_name":"C.","full_name":"Zirngibl, C."},{"first_name":"B.","full_name":"Schleich, B.","last_name":"Schleich"}],"publication":"Key Engineering Materials","department":[{"_id":"630"}]},{"type":"conference","year":"2021","citation":{"short":"D. Pivovarov, J. Mergheim, K. Willner, P. Steinmann, in: PAMM, Wiley, 2021.","ieee":"D. Pivovarov, J. Mergheim, K. Willner, and P. Steinmann, “Parametric FEM for computational homogenization of heterogeneous materials with random voids,” in PAMM, 2021, vol. 20, no. 1, doi: 10.1002/pamm.202000071.","ama":"Pivovarov D, Mergheim J, Willner K, Steinmann P. Parametric FEM for computational homogenization of heterogeneous materials with random voids. In: PAMM. Vol 20. Wiley; 2021. doi:10.1002/pamm.202000071","apa":"Pivovarov, D., Mergheim, J., Willner, K., & Steinmann, P. (2021). Parametric FEM for computational homogenization of heterogeneous materials with random voids. PAMM, 20(1). https://doi.org/10.1002/pamm.202000071","chicago":"Pivovarov, Dmytro, Julia Mergheim, Kai Willner, and Paul Steinmann. “Parametric FEM for Computational Homogenization of Heterogeneous Materials with Random Voids.” In PAMM, Vol. 20. Wiley, 2021. https://doi.org/10.1002/pamm.202000071.","bibtex":"@inproceedings{Pivovarov_Mergheim_Willner_Steinmann_2021, title={Parametric FEM for computational homogenization of heterogeneous materials with random voids}, volume={20}, DOI={10.1002/pamm.202000071}, number={1}, booktitle={PAMM}, publisher={Wiley}, author={Pivovarov, Dmytro and Mergheim, Julia and Willner, Kai and Steinmann, Paul}, year={2021} }","mla":"Pivovarov, Dmytro, et al. “Parametric FEM for Computational Homogenization of Heterogeneous Materials with Random Voids.” PAMM, vol. 20, no. 1, Wiley, 2021, doi:10.1002/pamm.202000071."},"issue":"1","_id":"34208","intvolume":" 20","status":"public","date_created":"2022-12-05T20:45:22Z","volume":20,"author":[{"last_name":"Pivovarov","first_name":"Dmytro","full_name":"Pivovarov, Dmytro"},{"last_name":"Mergheim","first_name":"Julia","full_name":"Mergheim, Julia"},{"last_name":"Willner","full_name":"Willner, Kai","first_name":"Kai"},{"first_name":"Paul","full_name":"Steinmann, Paul","last_name":"Steinmann"}],"publisher":"Wiley","publication":"PAMM","user_id":"14931","abstract":[{"lang":"eng","text":"Computational homogenization is a powerful tool which allows to obtain homogenized properties of materials on the macroscale from the simulation of the underlying microstructure. The response of the microstructure is, however, strongly affected by variations in the microstructure geometry. The effect of geometry variations is even stronger in cases when the material exhibits plastic deformations. In this work we study a model of a steel alloy with arbitrary distributed elliptic voids. We model one single unit cell of the material containing one single void. The geometry of the void is not precisely known and is modeled as a variable orientation of an ellipse. Large deformations applied to the unit cell necessitate a finite elasto-plastic material model. Since the geometry variation is parameterized, we can utilize the method recently developed for stochastic problems but also applicable to all types of parametric problems — the isoparametric stochastic local FEM (SL-FEM). It is an ideal tool for problems with only a few parameters but strongly nonlinear dependency of the displacement fields on parameters. Simulations demonstrate a strong effect of parameter variation on the plastic strains and, thus, substantiate the use of the parametric computational homogenization approach."}],"language":[{"iso":"eng"}],"doi":"10.1002/pamm.202000071","date_updated":"2023-01-02T11:52:59Z","project":[{"grant_number":"418701707","name":"TRR 285: TRR 285","_id":"130"},{"name":"TRR 285 - A: TRR 285 - Project Area A","_id":"131"},{"name":"TRR 285 – A05: TRR 285 - Subproject A05","_id":"139"}],"publication_identifier":{"issn":["1617-7061","1617-7061"]},"publication_status":"published","department":[{"_id":"630"}],"title":"Parametric FEM for computational homogenization of heterogeneous materials with random voids"},{"title":"In situ backside Raman spectroscopy of zinc oxide nanorods in an atmospheric‐pressure dielectric barrier discharge plasma","publication_identifier":{"issn":["0377-0486","1097-4555"]},"publication_status":"published","department":[{"_id":"15"}],"doi":"10.1002/jrs.6123","date_updated":"2023-01-04T14:51:10Z","language":[{"iso":"eng"}],"user_id":"77496","volume":52,"date_created":"2022-11-15T14:08:53Z","status":"public","keyword":["Spectroscopy","General Materials Science"],"publication":"Journal of Raman Spectroscopy","publisher":"Wiley","author":[{"full_name":"Knust, Steffen","first_name":"Steffen","last_name":"Knust"},{"last_name":"Ruhm","first_name":"Lukas","full_name":"Ruhm, Lukas"},{"last_name":"Kuhlmann","full_name":"Kuhlmann, Andreas","first_name":"Andreas"},{"full_name":"Meinderink, Dennis","orcid":"0000-0002-2755-6514","first_name":"Dennis","id":"32378","last_name":"Meinderink"},{"full_name":"Bürger, Julius","first_name":"Julius","id":"46952","last_name":"Bürger"},{"last_name":"Lindner","id":"20797","first_name":"Jörg","full_name":"Lindner, Jörg"},{"full_name":"de los Arcos de Pedro, Maria Teresa","first_name":"Maria Teresa","id":"54556","last_name":"de los Arcos de Pedro"},{"full_name":"Grundmeier, Guido","first_name":"Guido","id":"194","last_name":"Grundmeier"}],"issue":"7","_id":"34087","intvolume":" 52","page":"1237-1245","year":"2021","type":"journal_article","citation":{"ieee":"S. Knust et al., “In situ backside Raman spectroscopy of zinc oxide nanorods in an atmospheric‐pressure dielectric barrier discharge plasma,” Journal of Raman Spectroscopy, vol. 52, no. 7, pp. 1237–1245, 2021, doi: 10.1002/jrs.6123.","short":"S. Knust, L. Ruhm, A. Kuhlmann, D. Meinderink, J. Bürger, J. Lindner, M.T. de los Arcos de Pedro, G. Grundmeier, Journal of Raman Spectroscopy 52 (2021) 1237–1245.","bibtex":"@article{Knust_Ruhm_Kuhlmann_Meinderink_Bürger_Lindner_de los Arcos de Pedro_Grundmeier_2021, title={In situ backside Raman spectroscopy of zinc oxide nanorods in an atmospheric‐pressure dielectric barrier discharge plasma}, volume={52}, DOI={10.1002/jrs.6123}, number={7}, journal={Journal of Raman Spectroscopy}, publisher={Wiley}, author={Knust, Steffen and Ruhm, Lukas and Kuhlmann, Andreas and Meinderink, Dennis and Bürger, Julius and Lindner, Jörg and de los Arcos de Pedro, Maria Teresa and Grundmeier, Guido}, year={2021}, pages={1237–1245} }","mla":"Knust, Steffen, et al. “In Situ Backside Raman Spectroscopy of Zinc Oxide Nanorods in an Atmospheric‐pressure Dielectric Barrier Discharge Plasma.” Journal of Raman Spectroscopy, vol. 52, no. 7, Wiley, 2021, pp. 1237–45, doi:10.1002/jrs.6123.","chicago":"Knust, Steffen, Lukas Ruhm, Andreas Kuhlmann, Dennis Meinderink, Julius Bürger, Jörg Lindner, Maria Teresa de los Arcos de Pedro, and Guido Grundmeier. “In Situ Backside Raman Spectroscopy of Zinc Oxide Nanorods in an Atmospheric‐pressure Dielectric Barrier Discharge Plasma.” Journal of Raman Spectroscopy 52, no. 7 (2021): 1237–45. https://doi.org/10.1002/jrs.6123.","ama":"Knust S, Ruhm L, Kuhlmann A, et al. In situ backside Raman spectroscopy of zinc oxide nanorods in an atmospheric‐pressure dielectric barrier discharge plasma. Journal of Raman Spectroscopy. 2021;52(7):1237-1245. doi:10.1002/jrs.6123","apa":"Knust, S., Ruhm, L., Kuhlmann, A., Meinderink, D., Bürger, J., Lindner, J., de los Arcos de Pedro, M. T., & Grundmeier, G. (2021). In situ backside Raman spectroscopy of zinc oxide nanorods in an atmospheric‐pressure dielectric barrier discharge plasma. Journal of Raman Spectroscopy, 52(7), 1237–1245. https://doi.org/10.1002/jrs.6123"}}]