[{"publication_identifier":{"issn":["0264-4401","1758-7077"]},"quality_controlled":"1","publication_status":"published","page":"1-40","citation":{"apa":"Tchomgue Simeu, A., Caylak, I., &#38; Ostwald, R. (2026). Error representations for goal-oriented                    <i>a posteriori</i>                    error estimation in elasto-plasticity with applications to mesh adaptivity. <i>Engineering Computations</i>, 1–40. <a href=\"https://doi.org/10.1108/ec-12-2023-0975\">https://doi.org/10.1108/ec-12-2023-0975</a>","mla":"Tchomgue Simeu, Arnold, et al. “Error Representations for Goal-Oriented                    <i>a Posteriori</i>                    Error Estimation in Elasto-Plasticity with Applications to Mesh Adaptivity.” <i>Engineering Computations</i>, Emerald, 2026, pp. 1–40, doi:<a href=\"https://doi.org/10.1108/ec-12-2023-0975\">10.1108/ec-12-2023-0975</a>.","short":"A. Tchomgue Simeu, I. Caylak, R. Ostwald, Engineering Computations (2026) 1–40.","bibtex":"@article{Tchomgue Simeu_Caylak_Ostwald_2026, title={Error representations for goal-oriented                    <i>a posteriori</i>                    error estimation in elasto-plasticity with applications to mesh adaptivity}, DOI={<a href=\"https://doi.org/10.1108/ec-12-2023-0975\">10.1108/ec-12-2023-0975</a>}, journal={Engineering Computations}, publisher={Emerald}, author={Tchomgue Simeu, Arnold and Caylak, Ismail and Ostwald, Richard}, year={2026}, pages={1–40} }","chicago":"Tchomgue Simeu, Arnold, Ismail Caylak, and Richard Ostwald. “Error Representations for Goal-Oriented                    <i>a Posteriori</i>                    Error Estimation in Elasto-Plasticity with Applications to Mesh Adaptivity.” <i>Engineering Computations</i>, 2026, 1–40. <a href=\"https://doi.org/10.1108/ec-12-2023-0975\">https://doi.org/10.1108/ec-12-2023-0975</a>.","ieee":"A. Tchomgue Simeu, I. Caylak, and R. Ostwald, “Error representations for goal-oriented                    <i>a posteriori</i>                    error estimation in elasto-plasticity with applications to mesh adaptivity,” <i>Engineering Computations</i>, pp. 1–40, 2026, doi: <a href=\"https://doi.org/10.1108/ec-12-2023-0975\">10.1108/ec-12-2023-0975</a>.","ama":"Tchomgue Simeu A, Caylak I, Ostwald R. Error representations for goal-oriented                    <i>a posteriori</i>                    error estimation in elasto-plasticity with applications to mesh adaptivity. <i>Engineering Computations</i>. Published online 2026:1-40. doi:<a href=\"https://doi.org/10.1108/ec-12-2023-0975\">10.1108/ec-12-2023-0975</a>"},"year":"2026","date_created":"2026-01-21T06:49:18Z","author":[{"first_name":"Arnold","full_name":"Tchomgue Simeu, Arnold","id":"83075","last_name":"Tchomgue Simeu"},{"last_name":"Caylak","id":"75","full_name":"Caylak, Ismail","first_name":"Ismail"},{"first_name":"Richard","orcid":"0000-0003-2147-8444","last_name":"Ostwald","full_name":"Ostwald, Richard","id":"106876"}],"publisher":"Emerald","date_updated":"2026-01-21T06:50:58Z","doi":"10.1108/ec-12-2023-0975","title":"Error representations for goal-oriented                    <i>a posteriori</i>                    error estimation in elasto-plasticity with applications to mesh adaptivity","publication":"Engineering Computations","type":"journal_article","status":"public","abstract":[{"lang":"eng","text":"<jats:sec>\r\n                    <jats:title>Purpose</jats:title>\r\n                    <jats:p>The purpose of this paper is to develop new methods of error representation to improve the accuracy and numerical efficiency of a posteriori and goal-oriented adaptive framework of elastoplasticity with Prandtl–Reuss type material laws.</jats:p>\r\n                  </jats:sec>\r\n                  <jats:sec>\r\n                    <jats:title>Design/methodology/approach</jats:title>\r\n                    <jats:p>To obtain new methods of error representation for a posteriori and goal-oriented error estimators, weak forms of primal and dual problems are investigated starting with the initial boundary value problem (IBVP). Then, we approximate both problems using temporal discretization. Additionally, we introduce a secant form considering the nonlinearity of elasto-plastic constitutive equations, which is approximated by a tangent form. Finally, we obtain numerical primal and dual solutions and their corresponding error approximations of discretized primal and dual problems, allowing to build several goal-oriented a posteriori error estimators on temporal and spatial adaptive refinement by inserting primal solutions, dual solutions and their error approximations as arguments in residuals of both weak forms as well as in the secant form of the bilinear residual.</jats:p>\r\n                  </jats:sec>\r\n                  <jats:sec>\r\n                    <jats:title>Findings</jats:title>\r\n                    <jats:p>An elasto-plastic material is investigated in a framework of goal-oriented error estimator by using separately several methods of error representation to deal with either temporal or spatial adaptive refinement, as well as with both refinements leading to an effective reduction of computational effort. Specifically, new error representations based on goal-oriented error estimators are presented and obtained from primal and dual residuals, which use only primal solutions or only dual solutions or a combination of primal and dual solutions as arguments. Error representations obtained from primal residuals and evaluated using only primal arguments do not require the formulation of a dual problem.</jats:p>\r\n                  </jats:sec>\r\n                  <jats:sec>\r\n                    <jats:title>Research limitations/implications</jats:title>\r\n                    <jats:p>The effectiveness of the different proposed methods is illustrated by an example of a perforated sheet for adaptive spatial refinement where new mesh adaptation methods of error representation are compared against existing mesh adaptation methods such as uniform mesh refinement, mesh refinement based on gradient indicators and adjoint-based methods in literature. The framework generates a balanced mesh consisting of fine, medium and coarse elements for accurate results, avoiding a numerically costly simulation with only fine elements.</jats:p>\r\n                  </jats:sec>\r\n                  <jats:sec>\r\n                    <jats:title>Originality/value</jats:title>\r\n                    <jats:p>All new proposed methods of error representation successfully estimate actual errors during mesh adaptivity. Furthermore, the proposed methods of error representation allow us to obtain significant reduction and equidistribution of spatial error at the end of the mesh adaptivity process. Their application to a framework of goal-oriented error estimation due to time and mesh adaptivity remains an open issue.</jats:p>\r\n                  </jats:sec>"}],"department":[{"_id":"9"},{"_id":"952"},{"_id":"321"}],"user_id":"85414","_id":"63676","language":[{"iso":"eng"}]},{"date_created":"2026-03-18T05:28:29Z","publisher":"Wiley","title":"Mesh and Model Adaptivity for Multiscale Elastoplastic Models With Prandtl‐Reuss Type Material Laws","issue":"6","quality_controlled":"1","year":"2026","language":[{"iso":"eng"}],"publication":"International Journal for Numerical Methods in Engineering","abstract":[{"text":"<jats:title>ABSTRACT</jats:title>\r\n                  <jats:p>Homogenization methods simulate heterogeneous materials like composites effectively, but high computational demands can offset their benefits. This work balances accuracy and efficiency by assessing model and discretization errors of the finite element method (FEM) through an adaptive numerical scheme. Two model hierarchies are introduced, combining mean‐field and full‐field methods, and nonuniform transformation field analysis (NTFA) with full‐field methods. Both hierarchies use a full‐field FEM solution of the representative volume element (RVE) as reference. The study highlights the benefits of using effective constitutive equations from mean‐field and full‐field methods as well as NTFA methods, with a goal‐oriented a posteriori error estimator based on duality techniques controlling mesh and model errors in a forwards‐in‐time manner.</jats:p>","lang":"eng"}],"volume":127,"author":[{"full_name":"Simeu, Arnold Tchomgue","last_name":"Simeu","first_name":"Arnold Tchomgue"},{"first_name":"Ismail","last_name":"Caylak","id":"75","full_name":"Caylak, Ismail"},{"id":"106876","full_name":"Ostwald, Richard","orcid":"0000-0003-2147-8444","last_name":"Ostwald","first_name":"Richard"}],"date_updated":"2026-03-18T05:31:02Z","doi":"10.1002/nme.70294","publication_identifier":{"issn":["0029-5981","1097-0207"]},"publication_status":"published","intvolume":"       127","citation":{"chicago":"Simeu, Arnold Tchomgue, Ismail Caylak, and Richard Ostwald. “Mesh and Model Adaptivity for Multiscale Elastoplastic Models With Prandtl‐Reuss Type Material Laws.” <i>International Journal for Numerical Methods in Engineering</i> 127, no. 6 (2026). <a href=\"https://doi.org/10.1002/nme.70294\">https://doi.org/10.1002/nme.70294</a>.","ieee":"A. T. Simeu, I. Caylak, and R. Ostwald, “Mesh and Model Adaptivity for Multiscale Elastoplastic Models With Prandtl‐Reuss Type Material Laws,” <i>International Journal for Numerical Methods in Engineering</i>, vol. 127, no. 6, Art. no. e70294, 2026, doi: <a href=\"https://doi.org/10.1002/nme.70294\">10.1002/nme.70294</a>.","bibtex":"@article{Simeu_Caylak_Ostwald_2026, title={Mesh and Model Adaptivity for Multiscale Elastoplastic Models With Prandtl‐Reuss Type Material Laws}, volume={127}, DOI={<a href=\"https://doi.org/10.1002/nme.70294\">10.1002/nme.70294</a>}, number={6e70294}, journal={International Journal for Numerical Methods in Engineering}, publisher={Wiley}, author={Simeu, Arnold Tchomgue and Caylak, Ismail and Ostwald, Richard}, year={2026} }","short":"A.T. Simeu, I. Caylak, R. Ostwald, International Journal for Numerical Methods in Engineering 127 (2026).","mla":"Simeu, Arnold Tchomgue, et al. “Mesh and Model Adaptivity for Multiscale Elastoplastic Models With Prandtl‐Reuss Type Material Laws.” <i>International Journal for Numerical Methods in Engineering</i>, vol. 127, no. 6, e70294, Wiley, 2026, doi:<a href=\"https://doi.org/10.1002/nme.70294\">10.1002/nme.70294</a>.","ama":"Simeu AT, Caylak I, Ostwald R. Mesh and Model Adaptivity for Multiscale Elastoplastic Models With Prandtl‐Reuss Type Material Laws. <i>International Journal for Numerical Methods in Engineering</i>. 2026;127(6). doi:<a href=\"https://doi.org/10.1002/nme.70294\">10.1002/nme.70294</a>","apa":"Simeu, A. T., Caylak, I., &#38; Ostwald, R. (2026). Mesh and Model Adaptivity for Multiscale Elastoplastic Models With Prandtl‐Reuss Type Material Laws. <i>International Journal for Numerical Methods in Engineering</i>, <i>127</i>(6), Article e70294. <a href=\"https://doi.org/10.1002/nme.70294\">https://doi.org/10.1002/nme.70294</a>"},"department":[{"_id":"9"},{"_id":"952"},{"_id":"321"}],"user_id":"85414","_id":"65037","article_number":"e70294","type":"journal_article","status":"public"},{"language":[{"iso":"eng"}],"publication":"Proceedings in Applied Mathematics and Mechanics","abstract":[{"lang":"eng","text":"<jats:title>ABSTRACT</jats:title>\r\n                  <jats:p>This work is concerned with the modeling of a cold‐box sand, a composition of sand grains and a resin binder. To this end, experiments are performed, which show the following characteristics: localization phenomena in the form of a shear band, softening behavior in the force‐displacement curve, and asymmetric behavior for compression and tension. To model this complex material behavior, a micromorphic continuum is used. In the present contribution, we focus on the linear‐elastic regime and demonstrate the identifiability of micromorphic material parameters under deliberately induced inhomogeneous deformation states. In addition to the degrees of freedom of a classical continuum, the micromorphic model has additional degrees of freedom, introduced here in a phenomenological sense to represent kinematically enriched deformation modes associated with the granular microstructure. Accordingly, the micromorphic fields are not interpreted as a separate physical scale (e.g., “binder” vs. “grains”), but as an effective continuum description at the specimen scale. This contribution addresses parameter identification for a micromorphic model of cold‐box sand, with a clear separation between homogeneous deformation states governing classical elastic parameters and inhomogeneous states required to activate and identify micromorphic length‐scale parameters. The main challenge lies in identifying the micro material parameters. To determine these, the corresponding gradient terms in the constitutive formulation must be triggered via properly tuned experiments. Micro‐parameter identification is demonstrated using synthetic data generated from a boundary‐value problem with inhomogeneous displacement fields. The chosen benchmark enables controlled activation of gradient terms and thereby renders optimization‐based identification of micromorphic parameters feasible. The synthetic example is deliberately chosen to assess feasibility and identifiability under controlled conditions, thereby isolating micromorphic identifiability aspects from experimental uncertainties. The novelty of the contribution lies in explicitly linking micromorphic parameter identifiability to kinematic inhomogeneity, and in demonstrating this link within a tractable forward– inverse setting for a linear‐elastic micromorphic continuum.</jats:p>"}],"publisher":"Wiley","date_created":"2026-04-01T04:52:34Z","title":"Aspects of Parameter Identification for a Micromorphic Continuum applied to a Cold‐Box Sand","quality_controlled":"1","issue":"2","year":"2026","_id":"65266","department":[{"_id":"9"},{"_id":"952"},{"_id":"321"}],"user_id":"85414","article_number":"e70093","type":"journal_article","status":"public","date_updated":"2026-04-01T04:54:17Z","volume":26,"author":[{"first_name":"Alexander","full_name":"Börger, Alexander","id":"52037","last_name":"Börger"},{"first_name":"Rolf","full_name":"Mahnken, Rolf","last_name":"Mahnken"},{"first_name":"Ismail","full_name":"Caylak, Ismail","id":"75","last_name":"Caylak"},{"last_name":"Ostwald","orcid":"0000-0003-2147-8444","id":"106876","full_name":"Ostwald, Richard","first_name":"Richard"}],"doi":"10.1002/pamm.70093","publication_identifier":{"issn":["1617-7061","1617-7061"]},"publication_status":"published","intvolume":"        26","citation":{"chicago":"Börger, Alexander, Rolf Mahnken, Ismail Caylak, and Richard Ostwald. “Aspects of Parameter Identification for a Micromorphic Continuum Applied to a Cold‐Box Sand.” <i>Proceedings in Applied Mathematics and Mechanics</i> 26, no. 2 (2026). <a href=\"https://doi.org/10.1002/pamm.70093\">https://doi.org/10.1002/pamm.70093</a>.","ieee":"A. Börger, R. Mahnken, I. Caylak, and R. Ostwald, “Aspects of Parameter Identification for a Micromorphic Continuum applied to a Cold‐Box Sand,” <i>Proceedings in Applied Mathematics and Mechanics</i>, vol. 26, no. 2, Art. no. e70093, 2026, doi: <a href=\"https://doi.org/10.1002/pamm.70093\">10.1002/pamm.70093</a>.","ama":"Börger A, Mahnken R, Caylak I, Ostwald R. Aspects of Parameter Identification for a Micromorphic Continuum applied to a Cold‐Box Sand. <i>Proceedings in Applied Mathematics and Mechanics</i>. 2026;26(2). doi:<a href=\"https://doi.org/10.1002/pamm.70093\">10.1002/pamm.70093</a>","bibtex":"@article{Börger_Mahnken_Caylak_Ostwald_2026, title={Aspects of Parameter Identification for a Micromorphic Continuum applied to a Cold‐Box Sand}, volume={26}, DOI={<a href=\"https://doi.org/10.1002/pamm.70093\">10.1002/pamm.70093</a>}, number={2e70093}, journal={Proceedings in Applied Mathematics and Mechanics}, publisher={Wiley}, author={Börger, Alexander and Mahnken, Rolf and Caylak, Ismail and Ostwald, Richard}, year={2026} }","short":"A. Börger, R. Mahnken, I. Caylak, R. Ostwald, Proceedings in Applied Mathematics and Mechanics 26 (2026).","mla":"Börger, Alexander, et al. “Aspects of Parameter Identification for a Micromorphic Continuum Applied to a Cold‐Box Sand.” <i>Proceedings in Applied Mathematics and Mechanics</i>, vol. 26, no. 2, e70093, Wiley, 2026, doi:<a href=\"https://doi.org/10.1002/pamm.70093\">10.1002/pamm.70093</a>.","apa":"Börger, A., Mahnken, R., Caylak, I., &#38; Ostwald, R. (2026). Aspects of Parameter Identification for a Micromorphic Continuum applied to a Cold‐Box Sand. <i>Proceedings in Applied Mathematics and Mechanics</i>, <i>26</i>(2), Article e70093. <a href=\"https://doi.org/10.1002/pamm.70093\">https://doi.org/10.1002/pamm.70093</a>"}},{"title":"Damage-incorporated four-step mean-field method for simulating CFRP machining: a novel algorithmic approach","doi":"10.1007/s41939-025-01026-4","date_updated":"2025-10-20T12:05:57Z","publisher":"Springer Science and Business Media LLC","date_created":"2025-09-05T07:40:31Z","author":[{"id":"93591","full_name":"Zhan, Yingjie","last_name":"Zhan","first_name":"Yingjie"},{"id":"75","full_name":"Caylak, Ismail","last_name":"Caylak","first_name":"Ismail"},{"orcid":"0000-0003-2147-8444","last_name":"Ostwald","id":"106876","full_name":"Ostwald, Richard","first_name":"Richard"},{"full_name":"Barth, Enrico","last_name":"Barth","first_name":"Enrico"},{"last_name":"Uhlmann","full_name":"Uhlmann, Eckart","first_name":"Eckart"}],"volume":8,"year":"2025","citation":{"ama":"Zhan Y, Caylak I, Ostwald R, Barth E, Uhlmann E. Damage-incorporated four-step mean-field method for simulating CFRP machining: a novel algorithmic approach. <i>Multiscale and Multidisciplinary Modeling, Experiments and Design</i>. 2025;8(10). doi:<a href=\"https://doi.org/10.1007/s41939-025-01026-4\">10.1007/s41939-025-01026-4</a>","chicago":"Zhan, Yingjie, Ismail Caylak, Richard Ostwald, Enrico Barth, and Eckart Uhlmann. “Damage-Incorporated Four-Step Mean-Field Method for Simulating CFRP Machining: A Novel Algorithmic Approach.” <i>Multiscale and Multidisciplinary Modeling, Experiments and Design</i> 8, no. 10 (2025). <a href=\"https://doi.org/10.1007/s41939-025-01026-4\">https://doi.org/10.1007/s41939-025-01026-4</a>.","ieee":"Y. Zhan, I. Caylak, R. Ostwald, E. Barth, and E. Uhlmann, “Damage-incorporated four-step mean-field method for simulating CFRP machining: a novel algorithmic approach,” <i>Multiscale and Multidisciplinary Modeling, Experiments and Design</i>, vol. 8, no. 10, Art. no. 434, 2025, doi: <a href=\"https://doi.org/10.1007/s41939-025-01026-4\">10.1007/s41939-025-01026-4</a>.","apa":"Zhan, Y., Caylak, I., Ostwald, R., Barth, E., &#38; Uhlmann, E. (2025). Damage-incorporated four-step mean-field method for simulating CFRP machining: a novel algorithmic approach. <i>Multiscale and Multidisciplinary Modeling, Experiments and Design</i>, <i>8</i>(10), Article 434. <a href=\"https://doi.org/10.1007/s41939-025-01026-4\">https://doi.org/10.1007/s41939-025-01026-4</a>","short":"Y. Zhan, I. Caylak, R. Ostwald, E. Barth, E. Uhlmann, Multiscale and Multidisciplinary Modeling, Experiments and Design 8 (2025).","mla":"Zhan, Yingjie, et al. “Damage-Incorporated Four-Step Mean-Field Method for Simulating CFRP Machining: A Novel Algorithmic Approach.” <i>Multiscale and Multidisciplinary Modeling, Experiments and Design</i>, vol. 8, no. 10, 434, Springer Science and Business Media LLC, 2025, doi:<a href=\"https://doi.org/10.1007/s41939-025-01026-4\">10.1007/s41939-025-01026-4</a>.","bibtex":"@article{Zhan_Caylak_Ostwald_Barth_Uhlmann_2025, title={Damage-incorporated four-step mean-field method for simulating CFRP machining: a novel algorithmic approach}, volume={8}, DOI={<a href=\"https://doi.org/10.1007/s41939-025-01026-4\">10.1007/s41939-025-01026-4</a>}, number={10434}, journal={Multiscale and Multidisciplinary Modeling, Experiments and Design}, publisher={Springer Science and Business Media LLC}, author={Zhan, Yingjie and Caylak, Ismail and Ostwald, Richard and Barth, Enrico and Uhlmann, Eckart}, year={2025} }"},"intvolume":"         8","publication_status":"published","quality_controlled":"1","publication_identifier":{"issn":["2520-8160","2520-8179"]},"issue":"10","article_number":"434","language":[{"iso":"eng"}],"_id":"61138","user_id":"85414","department":[{"_id":"9"},{"_id":"952"},{"_id":"321"}],"status":"public","type":"journal_article","publication":"Multiscale and Multidisciplinary Modeling, Experiments and Design"},{"citation":{"ama":"Penner E, Caylak I, Mahnken R. Experimental Investigations of Carbon Fiber Reinforced Polymer Composites and Their Constituents to Determine Their Elastic Material Properties and Complementary Inhomogeneous Experiments with Local Strain Considerations. <i>Fibers and Polymers</i>. Published online 2023. doi:<a href=\"https://doi.org/10.1007/s12221-023-00122-x\">10.1007/s12221-023-00122-x</a>","ieee":"E. Penner, I. Caylak, and R. Mahnken, “Experimental Investigations of Carbon Fiber Reinforced Polymer Composites and Their Constituents to Determine Their Elastic Material Properties and Complementary Inhomogeneous Experiments with Local Strain Considerations,” <i>Fibers and Polymers</i>, 2023, doi: <a href=\"https://doi.org/10.1007/s12221-023-00122-x\">10.1007/s12221-023-00122-x</a>.","chicago":"Penner, Eduard, Ismail Caylak, and Rolf Mahnken. “Experimental Investigations of Carbon Fiber Reinforced Polymer Composites and Their Constituents to Determine Their Elastic Material Properties and Complementary Inhomogeneous Experiments with Local Strain Considerations.” <i>Fibers and Polymers</i>, 2023. <a href=\"https://doi.org/10.1007/s12221-023-00122-x\">https://doi.org/10.1007/s12221-023-00122-x</a>.","short":"E. Penner, I. Caylak, R. Mahnken, Fibers and Polymers (2023).","mla":"Penner, Eduard, et al. “Experimental Investigations of Carbon Fiber Reinforced Polymer Composites and Their Constituents to Determine Their Elastic Material Properties and Complementary Inhomogeneous Experiments with Local Strain Considerations.” <i>Fibers and Polymers</i>, Springer Science and Business Media LLC, 2023, doi:<a href=\"https://doi.org/10.1007/s12221-023-00122-x\">10.1007/s12221-023-00122-x</a>.","bibtex":"@article{Penner_Caylak_Mahnken_2023, title={Experimental Investigations of Carbon Fiber Reinforced Polymer Composites and Their Constituents to Determine Their Elastic Material Properties and Complementary Inhomogeneous Experiments with Local Strain Considerations}, DOI={<a href=\"https://doi.org/10.1007/s12221-023-00122-x\">10.1007/s12221-023-00122-x</a>}, journal={Fibers and Polymers}, publisher={Springer Science and Business Media LLC}, author={Penner, Eduard and Caylak, Ismail and Mahnken, Rolf}, year={2023} }","apa":"Penner, E., Caylak, I., &#38; Mahnken, R. (2023). Experimental Investigations of Carbon Fiber Reinforced Polymer Composites and Their Constituents to Determine Their Elastic Material Properties and Complementary Inhomogeneous Experiments with Local Strain Considerations. <i>Fibers and Polymers</i>. <a href=\"https://doi.org/10.1007/s12221-023-00122-x\">https://doi.org/10.1007/s12221-023-00122-x</a>"},"year":"2023","publication_identifier":{"issn":["1229-9197","1875-0052"]},"publication_status":"published","doi":"10.1007/s12221-023-00122-x","title":"Experimental Investigations of Carbon Fiber Reinforced Polymer Composites and Their Constituents to Determine Their Elastic Material Properties and Complementary Inhomogeneous Experiments with Local Strain Considerations","date_created":"2023-02-16T12:37:11Z","author":[{"full_name":"Penner, Eduard","last_name":"Penner","first_name":"Eduard"},{"full_name":"Caylak, Ismail","id":"75","last_name":"Caylak","first_name":"Ismail"},{"first_name":"Rolf","full_name":"Mahnken, Rolf","id":"335","last_name":"Mahnken"}],"publisher":"Springer Science and Business Media LLC","date_updated":"2023-03-24T08:42:33Z","status":"public","abstract":[{"lang":"eng","text":"<jats:title>Abstract</jats:title><jats:p>Composite materials, such as fiber reinforced polymers, become increasingly important due to their excellent mechanical and lightweight properties. In this respect, this paper reports the characterization of a unidirectional carbon fiber reinforced polymer composite material. Particularly, the mechanical behavior of the overall composite and of the individual constituents of the composite is investigated. To this end, tensile and shear tests are performed for the composite. As a result, statistics for five transversely isotropic material parameters can be established for the composite. For the description of the mechanical properties of the constituents, tensile tests for the carbon fiber as well as for the polymer matrix are carried out. In addition, the volume fraction of fibers in the matrix is determined experimentally using an ashing technique and Archimedes’ principle. For the Young’s modulus of the fiber, the Young’s modulus and transverse contraction of the matrix, as well as the volume fraction of the constituents, statistics can be concluded. The resulting mechanical properties on both scales are useful for the application and validation of different material models and homogenization methods. Finally, in order to validate the obtained properties in the future, inhomogeneous tests were performed, once a flat plate with a hole and a flat plate with semicircular notches.</jats:p>"}],"publication":"Fibers and Polymers","type":"journal_article","language":[{"iso":"eng"}],"keyword":["Polymers and Plastics","General Chemical Engineering","General Chemistry"],"department":[{"_id":"9"},{"_id":"154"},{"_id":"321"}],"user_id":"335","_id":"42165"},{"publisher":"Elsevier BV","date_updated":"2023-04-27T10:08:09Z","date_created":"2023-02-02T12:49:43Z","author":[{"full_name":"Clemens, Robin","last_name":"Clemens","first_name":"Robin"},{"first_name":"Enrico","full_name":"Barth, Enrico","last_name":"Barth"},{"first_name":"Eckart","full_name":"Uhlmann, Eckart","last_name":"Uhlmann"},{"first_name":"Yingjie","full_name":"Zhan, Yingjie","last_name":"Zhan"},{"full_name":"Caylak, Ismail","id":"75","last_name":"Caylak","first_name":"Ismail"},{"first_name":"Rolf","last_name":"Mahnken","full_name":"Mahnken, Rolf","id":"335"}],"title":"Effects on Process Forces of Individual Milling Tool Edges Depending on the Cutting Angle and Cutting Speed When Milling Cfrp","doi":"10.2139/ssrn.4259246","quality_controlled":"1","publication_identifier":{"issn":["1556-5068"]},"publication_status":"published","year":"2022","citation":{"mla":"Clemens, Robin, et al. “Effects on Process Forces of Individual Milling Tool Edges Depending on the Cutting Angle and Cutting Speed When Milling Cfrp.” <i>SSRN Electronic Journal</i>, Elsevier BV, 2022, doi:<a href=\"https://doi.org/10.2139/ssrn.4259246\">10.2139/ssrn.4259246</a>.","bibtex":"@article{Clemens_Barth_Uhlmann_Zhan_Caylak_Mahnken_2022, title={Effects on Process Forces of Individual Milling Tool Edges Depending on the Cutting Angle and Cutting Speed When Milling Cfrp}, DOI={<a href=\"https://doi.org/10.2139/ssrn.4259246\">10.2139/ssrn.4259246</a>}, journal={SSRN Electronic Journal}, publisher={Elsevier BV}, author={Clemens, Robin and Barth, Enrico and Uhlmann, Eckart and Zhan, Yingjie and Caylak, Ismail and Mahnken, Rolf}, year={2022} }","short":"R. 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