@inproceedings{22132, author = {{Riemer, A. and Leuders, L. and Kullmer, G. and Richard, H.A.}}, booktitle = {{DVM - Tagung - Additiv gefertigte Bauteile und Strukturen, Deutscher Verband für Materialforschung und -prüfung e.V.}}, pages = {{161--174}}, title = {{{Materialkennwerte lasergeschmolzener Werkstoffe}}}, year = {{2016}}, } @inproceedings{22146, abstract = {{manufacturing in electrical engineering applications.}}, author = {{Reschetnik, W. and Brüggemann, J.P. and Aydinöz, M.E. and Grydin, O. and Hoyer, K.P. and Kullmer, G. and Richard, H.A.}}, booktitle = {{Procedia Structural Integrity}}, pages = {{3040--3048}}, title = {{{Fatigue crack growth behavior and mechanical properties of additively processed EN AW-7075 aluminium alloy}}}, year = {{2016}}, } @inproceedings{22149, author = {{Riemer, A. and Richard, H.A.}}, booktitle = {{Procedia Structural Integrity}}, pages = {{1229--1236}}, title = {{{Crack Propagation in Additive Manufactured Materials and Structures}}}, year = {{2016}}, } @inproceedings{22180, abstract = {{The implementation of lattice structures into additive manufactured parts is an important method to decrease part weight maintaining a high specific payload. However, the manufacturability of lattice structures and mechanical properties for polymer laser sintering are quite unknown yet. To examine the manufacturability, sandwich structures with different cell types, cell sizes and lattice bar widths were designed, manufactured and evaluated. A decisive criterion is for example a sufficient powder removal. In a second step, manufacturable structures were analyzed using four-point-bending tests. Experimental data is compared to the density of the lattice structures and allows for a direct comparison of different cell types with varied geometrical attributes. The results of this work are guidelines for the design and dimensioning of laser sintered lattice structures.}}, author = {{Josupeit, Stefan and Delfs, Patrick and Menge, Dennis and Schmid, Hans-Joachim}}, booktitle = {{27th Annual International Solid Freeform Fabrication Symposium }}, pages = {{2077--2086}}, title = {{{Manufacturability and Mechanical Characterization of Laser Sintered Lattice Structures}}}, doi = {{http://utw10945.utweb.utexas.edu/sites/default/files/2016/166-Josupeit.pdf}}, volume = {{27}}, year = {{2016}}, } @article{22185, abstract = {{The layered structure of Additive Manufacturing processes results in a stair- stepping effect of the surface topographies. In general, the impact of this effect strongly depends on the build angle of a surface, whereas the overall surface roughness is additionally caused by the resolution of the specific AM process. The aim of this work is the prediction of the surface quality in dependence of the building orientation of a part. These results can finally be used to optimize the orientation to get a desired surface quality. As not all parts of the component surface are equally important, a preselection of areas can be used to improve the overall surface quality of relevant areas. The model uses the digital AMF format of a part. Each triangle is assigned with a roughness value and by testing different orientations the best one can be found. This approach needs a database for the surface qualities. This must be done separately for each Additive Manufacturing process and is shown exemplarily with a surface topography simulation for the laser sintering process.}}, author = {{Delfs, Patrick and Tows, Marcel and Schmid, Hans-Joachim}}, isbn = {{2214-8604}}, journal = {{Additive Manufacturing}}, number = {{12, Part B}}, pages = {{214--320}}, publisher = {{Elsevier}}, title = {{{Optimized build orientation of additive manufactured parts for improved surface quality and build time}}}, doi = {{10.1016/j.addma.2016.06.003}}, volume = {{2}}, year = {{2016}}, } @inproceedings{22190, author = {{Delfs, Patrick and Schmid, Hans-Joachim}}, booktitle = {{Fraunhofer Direct Digital Manufacturing Conference}}, isbn = {{978-3-8396-1001-5}}, pages = {{411--414}}, title = {{{Extended Analysis of the Surface Topography of Laser Sintered Polymer Parts }}}, doi = {{https://www.bookshop.fraunhofer.de/buch/fraunhofer-direct-digital-manufacturing-conference-ddmc-2016/245111#}}, volume = {{3}}, year = {{2016}}, } @inproceedings{22194, author = {{Josupeit, Stefan and Schmid, Hans-Joachim}}, booktitle = {{International Congress on Particle Technology (PARTEC) }}, title = {{{Thermal properties of polyamide 12 powder for application in laser sintering}}}, year = {{2016}}, } @inproceedings{22200, abstract = {{In the polymer laser sinter process, part quality depends on many influencing factors along the process chain. For application of the technology in series production and an integration of laser sintered parts into a technical environment, the dimensional accuracy of parts has to be taken into account. Therefore, occuring deviatons and their scattering have to be reduced and homogenized based on process parameters and build job layout. In this work, the dimensional accuracy of laser sintered parts is analyzed for varied parameter values. Influences of different process and geometrical build job parameters on dimensional deviatons are figured out. The experimental results allow an evaluation of more and less important influences. Finally, measures are deduced to reduce and homogenize dimensional deviations.}}, author = {{Josupeit, Stefan and Delfs, Patrick and Lieneke, Tobias and Adam, Guido and Gessler, Monika and Pfisterer, H. and Schmid, Hans-Joachim}}, booktitle = {{Rapid Tech - International Trade Show & Conference for Additive Manufacturing }}, isbn = {{978-3-446-45060-8}}, pages = {{107--120}}, title = {{{Dimensional accuracy of polymer laser sintered parts: Influences and measures}}}, doi = {{10.3139/9783446450608.009}}, year = {{2016}}, } @inproceedings{22403, abstract = {{Additive manufacturing processes offer great freedom in the design of components. This enables a high level of function integration. Also in terms of vibration damping, additive manufacturing yields opportunities for the selective implementation of damping functions due to their characteristics. In powder-based processes the disperse support material can be kept inside the cavities of the structure. This powder material can act as a particle damper. Due to the freedoms in design, the damping behavior can be adjusted selectively by varying the geometrical features of the cavities. Within this paper, investigations on the damping behavior of additive manufactured parts regarding free bending vibrations are focused.}}, author = {{Künneke, Thomas and Zimmer, Detmar}}, booktitle = {{DVM Tagung - Additiv gefertigte Bauteile und Strukturen}}, pages = {{151--160}}, title = {{{Funktionsintegration additiv gefertigter Dämpfungsstrukturen bei Biegeschwingungen}}}, year = {{2016}}, } @inproceedings{22404, abstract = {{Additive Manufacturing (AM), also known as 3D printing, is a relatively new technology which enables the toolless production of components and entire assemblies directly from a CAD file. Today, the technology is still not widely used in industrial production. It is mainly limited to special applications, although it shows great potential. In this paper, first approaches are shown to apply AM to the production of rotors for permanent magnet synchronous machines (PMSM). The possibilities of a lightweight design with a low moment of inertia as well as the influence on the magnetic anisotropy for an improved sensorless control of PMSM are pointed out. The results clearly demonstrate the great potential of additive manufacturing in electrical engineering applications.}}, author = {{Lammers, Stefan and Adam, Guido and Schmid, Hans-Joachim and Mrozek, Rafael and Oberacker, Rainer and Hoffmann, Michael and Quattrone, Francesco and Ponick, Bernd}}, booktitle = {{EDPC 2016}}, isbn = {{978-1-5090-2908-2}}, title = {{{Additive Manufacturing of a Lightweight Rotor for a Permanent Magnet Synchronous Machine}}}, doi = {{10.1109/EDPC.2016.7851312}}, year = {{2016}}, } @inproceedings{22408, author = {{Josupeit, Stefan and Delfs, Patrick and Lieneke, Tobias and Schmid, Hans-Joachim}}, booktitle = {{27th Annual International Solid Freeform Fabrication Symposium }}, title = {{{Influences on the dimensional Accuracy of Laser Sintered Parts along the Process Chain}}}, year = {{2016}}, } @inproceedings{22409, author = {{Lieneke, Tobias and de Groot, Stefan and Adam, Guido and Zimmer, Detmar}}, booktitle = {{ASPE 2016 Summer Topical Meeting}}, pages = {{S.9--15}}, title = {{{Dimensional tolerances for additive manufacturing: Experimental investigation of manufacturing accuracy for selective laser melting}}}, year = {{2016}}, } @inproceedings{22410, author = {{Knoop, Frederick and Lieneke, Tobias and Schoeppner, Volker}}, booktitle = {{ASPE Spring Topical Meeting}}, pages = {{S.3--8}}, title = {{{Reproducibility of the Dimensional Accuracy - Investigations for FDM}}}, doi = {{10.3139/9783446454606.004}}, year = {{2016}}, } @inproceedings{22411, author = {{Knoop, Frederick and Lieneke, Tobias and Schoeppner, Volker}}, booktitle = {{Summer Topical Meeting 2016}}, title = {{{Reproducibility of the Dimensional Accuracy - Investigations for FDM}}}, year = {{2016}}, } @inproceedings{22412, abstract = {{Additive manufacturing creates parts in layers without using formative tools. Compared to established manufacturing processes, additive manufacturing offers many advantages. However, only a few research institutions and technology-leading companies use additive manufacturing for end-use part production because relevant challenges have not been sufficiently researched yet. Missing restrictions become apparent in the available geometrical accuracy. The objective of this investigation was the experimental determination of dimensional tolerances using standard parameters. To this end, a methodical procedure was set up. Based on experimentally determined deviations, dimensional tolerances were derived.}}, author = {{Lieneke, Tobias and Denzer, Vera and Adam, Guido and Zimmer, Detmar}}, booktitle = {{CAT 2016}}, pages = {{286--291}}, title = {{{Dimensional tolerances for additive manufacturing: Experimental investigation for Fused Deposition Modeling}}}, doi = {{10.1016/j.procir.2016.02.361}}, volume = {{43}}, year = {{2016}}, } @inproceedings{21687, abstract = {{The spare part industry in aerospace is highly demanding. For conventional manufacturing technologies it is difficult to meet these requirements. In contrast to that, the design freedom of Additive Manufacturing enables the production of complex and lightweight parts. The lack of experience with this technology hampers the decision where Additive Manufacturing can be economically applied. The cost drivers have to be newly evaluated and holistically investigated. Supply chain advantages have to be considered during the decision process, too. Therefore, aerospace characteristics are analyzed within the paper and a methodology based on Multi Attribute Decision Making (MADM) is introduced. To do so, the cost appraisal for Additive Manufacturing has to be detailed. Additionally, changes in the supply chain have to be identified and quantified. Quality criteria have to be taken into account as well. In the end it is shown how these influence factors can be combined to create a decision support. }}, author = {{Deppe, G. and Koch, R.}}, booktitle = {{27th Annual International Solid Freeform Fabrication Symposium }}, pages = {{81--92}}, title = {{{Supporting the Decision Process for applying Additive Manufacturing in the MRO Aerospace Business by MADM}}}, doi = {{http://utw10945.utweb.utexas.edu/sites/default/files/2016/006-Deppe.pdf}}, volume = {{27}}, year = {{2016}}, } @inproceedings{21688, abstract = {{Additive Manufacturing offers a great potential for the optimization of products. Therefore different approaches are feasible to exploit these potentials for elaborating optimal solutions. For example these include optimization of weight or stiffness of structural components as well as the integration of functions and other entities of assemblies. Note, however, that additive manufacturing processes have process specific limitations. Products, components and assemblies, as well as procedures for the design and production preparation must be optimized with regard to a successful additive manufacturing. The use of already known tools for the optimization and design needs to be reconsidered and adapted to theadditive manufacturing. This also includes the production planning with component orientation in build chamber as well as a necessary quality management system. This paper shows several ways for product optimization with additive manufacturing, often based on topology optimization, and procedures for information gathering, decision making and shape determination for part optimization for Additive Manufacturing.}}, author = {{Reiher, T. and Koch, R.}}, booktitle = {{27th Annual International Solid Freeform Fabrication Symposium }}, pages = {{2236--2249}}, title = {{{Product optimization with and for Additive Manufacturing}}}, doi = {{http://utw10945.utweb.utexas.edu/sites/default/files/2016/179-Reiher.pdf}}, volume = {{27}}, year = {{2016}}, } @inproceedings{21689, abstract = {{Additive manufacturing offers advantages for the production of a final product. Nowadays still many companies have not integrated this new technology into their product development processes (PDP). This paper will discuss additive manufacturing with regards to the current available PDP's while setting a focus on the economic aspects of the integration. Based on a sample part several tools will be discusses which may be uses in the different phases of product development. These tools aim on the simplification of integrating additive manufacturing technologies into existing PDP's. Included are methods for early and accurate cost estimation as well as product selection processes, best practice templates for creating knowledge and process awareness.}}, author = {{Lindemann, C. and Koch, R.}}, booktitle = {{27th Annual International Solid Freeform Fabrication Symposium }}, pages = {{93--112}}, title = {{{Cost Efficient Design and Planning for Additive Manufacturing Technologies}}}, doi = {{http://utw10945.utweb.utexas.edu/sites/default/files/2016/007-Lindemann.pdf}}, volume = {{27}}, year = {{2016}}, } @book{21698, abstract = {{Additive Manufacturing (AM) has been growing rapidly with doubledigit growth rates during the last years and a rising trend towards end products. The further development of the technology highly depends on some critical success factors. For the future, it is vital to know which innovations will be necessary to satisfy the needs of industry. The impulsive forces will be those branches whose special characteristics are met by AM. Within the DMRC study “Thinking ahead the Future of Additive Manufacturing – Analysis of Promising Industries” (Gausemeier 2011), especially aircraft production, automotive production and the electronics industry have been identified as very promising to profit from the use of AM. Experts have selected these branches by assessing the prospective attractiveness of current application fields. Those branches are characterized by low quantities, complex part designs, lightweight design and/or high unit prices. For the aerospace industry, all four elements are of high relevance, which is why it has been a pioneer in applying and developing AM technology since the early beginning (Gausemeier 2011 and 2012). }}, author = {{Lindemann, C. and Deppe, G. and Koch, R.}}, isbn = {{978-3-7316-1156-1}}, pages = {{283}}, publisher = {{Metropolis Verlag}}, title = {{{Scenario Based Outlook of Additive Manufacturing Applications for the Aerospace Market}}}, year = {{2016}}, } @book{21699, abstract = {{Additive Manufacturing (AM) is often deemed to be a driver for product piracy in public media. The reasons for this are mainly seen in the fact that it provides a possibility to easily copy three-dimensional objects when used in combination with scanning technologies. This contribution will not focus on the knowledge and skills needed to master AM technology but on its potential contribution to prevent product piracy and reverse engineering. The reverse engineering process will be analyzed to understand the practice of imitators and to transfer the characteristics of AM into specific measures. Finally a five-step methodology is presented which can be used as a guideline to implement protection measures in products to be (re-) developed. This guideline is supposed to be used by industrial companies since an expert survey has identified them as being very likely to profit from the use of AM (Echterhoff et al. 2011). }}, author = {{Jahnke, U. and Koch, R.}}, isbn = {{978-3-7316-1156-1}}, pages = {{283}}, publisher = {{Metropolis Verlag}}, title = {{{Prevention of Product Piracy - Potentials of Additive Manufacturing}}}, year = {{2016}}, }