@inproceedings{22395, author = {{Lieneke, Tobias and Adam, Guido and Leuders, Stefan and Knoop, Frederick and Josupeit, Stefan and Delfs, Patrick and Funke, Nils and Zimmer, Detmar}}, booktitle = {{Proceedings of the Rapid Tech 2015}}, title = {{{Entwicklung einer Methode zur systematischen Erarbeitung von Maßtoleranzen für additive Fertigungsverfahren}}}, year = {{2015}}, } @inproceedings{22396, abstract = {{Additive manufacturing offers many technical and economical benefits. In order to profit from these benefits, it is necessary to consider the manufacturing limits and restrictions. This applies in particular to the geometrical accuracy. Therefore, the achievable geometrical accuracy needs to be investigated, which enables the determination of realistic tolerances. Thus, two different aims are considered. The first aim is the determination of dimensional tolerances that can be stated if additive manufacturing is used under normal workshop conditions. Within the second aim, relevant process parameters and manufacturing influences will be optimized in order to reduce dimensional deviations. To achieve both aims a method was developed first. This method identifies relevant influential factors on the geometrical accuracy for the processes Fused Deposition Modeling (FDM), Laser Sintering (LS) and Laser Melting (LM). Factors were selected that are expected to affect the geometrical accuracy mainly. The first investigations deal with measuring linear dimensions on a designed test specimen and the derivation of achievable dimensional tolerances. This paper will present both, the developed method and the first results of the experimental investigations.}}, author = {{Lieneke, Tobias and Adam, Guido and Leuders, Stefan and Knoop, Frederick and Josupeit, Stefan and Delfs, Patrick and Funke, Nils and Zimmer, Detmar}}, booktitle = {{26th Annual International Solid Freeform Fabrication Symposium}}, pages = {{371--384}}, title = {{{Systematical determination of tolerances for additive manufacturing by measuring linear dimensions}}}, doi = {{https://www.researchgate.net/publication/316827402_Systematical_Determination_of_Tolerances_for_Additive_Manufacturing_by_Measuring_Linear_Dimensions}}, volume = {{26}}, year = {{2015}}, } @phdthesis{22397, author = {{Adam, Guido}}, isbn = {{978-3-8440-3474-5}}, publisher = {{Shaker Verlag}}, title = {{{Systematische Erarbeitung von Konstruktionsregeln für die additiven Fertigungsverfahren Lasersintern, Laserschmelzen und Fused Deposition Modeling}}}, year = {{2015}}, } @inproceedings{22398, author = {{Adam, Guido}}, booktitle = {{Inside 3D Printing Conference and Expo}}, title = {{{On tolerances for additive manufacturing}}}, year = {{2015}}, } @inproceedings{22399, author = {{Lieneke, Tobias}}, booktitle = {{Rapid Tech 2015}}, title = {{{Entwicklung einer Methode zur systematischen Erarbeitung von Maßtoleranzen für additive Fertigungsverfahren}}}, year = {{2015}}, } @inproceedings{22400, author = {{Lieneke, Tobias}}, booktitle = {{26th Annual International Solid Freeform Fabrication Symposium}}, title = {{{Systematical determination of dimensional tolerances for additive manufacturing }}}, volume = {{26}}, year = {{2015}}, } @article{22809, author = {{Rai, Ashish K. and Gordon, Simon and Ludwig, Arne and Wieck, Andreas D. and Zrenner, Artur and Reuter, Dirk}}, issn = {{0370-1972}}, journal = {{physica status solidi (b)}}, pages = {{437--441}}, title = {{{Spatially indirect transitions in electric field tunable quantum dot diodes}}}, doi = {{10.1002/pssb.201552591}}, year = {{2015}}, } @inproceedings{23056, author = {{Bertelsmeier, Fabian and Trächtler, Ansgar}}, booktitle = {{20th IEEE International Conference on Emerging Technologies and Factory Automation}}, title = {{{Decentralized Controller Reconfiguration Strategies for Hybrid System Dynamics based on Product-Intelligence}}}, year = {{2015}}, } @inproceedings{23062, author = {{Bertelsmeier, Fabian and Vathauer, Marc and Henke, Christian and Vathauer, Karl-Ernst and Trächtler, Ansgar}}, booktitle = {{Automation 2015}}, publisher = {{VDI-Verlag}}, title = {{{Produkt- und lastabhängiges dezentrales Motormanagement für die Fördertechnik: Anforderungen, Design und Applikation }}}, year = {{2015}}, } @inproceedings{23063, author = {{Pai, Arathi and Niendorf, Thomas and Krooß, Philipp and Koke, Isabel and Trächtler, Ansgar and Schaper, Mirko}}, booktitle = {{7th ECCOMAS Thematic Conference on Smart Structures and Materials - SMART}}, title = {{{Modelling the Constitutive Behaviour of Martensite and Austenite in Shape Memory Alloys Using Closed-Form Analytical Continuous Equations}}}, year = {{2015}}, } @article{23064, author = {{Damerow, Ulf-Hendrik and Borsig, Michael and Tabakajew, Dmitri and Schaermann, Waldemar and Hesse, Marc and Homberg, Werner and Trächtler, Ansgar and Jungeblut, Thorsten}}, journal = {{wt Werkstattstechnik online}}, pages = {{427--432}}, title = {{{Intelligente Biegeverfahren}}}, volume = {{6-2015}}, year = {{2015}}, } @inproceedings{23072, author = {{Bertelsmeier, Fabian and Engelmeier, Tobias and Trächtler, Ansgar}}, booktitle = {{Tagungsband Mechatronik 2015}}, pages = {{97--102}}, publisher = {{VDI Mechatronik}}, title = {{{Online-Rekonfiguration hybrider Regelkreise in Abhängigkeit variierender Produkteigenschaften}}}, year = {{2015}}, } @inproceedings{23075, author = {{Michael, Jan and Hillebrand, Michael and Dumitrescu, Roman and Henke, Christian and Trächtler, Ansgar}}, booktitle = {{VDI Mechatronik 2015 Tagungsband}}, pages = {{245--250}}, publisher = {{VDI Mechatronik}}, title = {{{Modellbasierte Mehrzieloptimierung zur Integration von Hausgeräten in SmartGrids}}}, year = {{2015}}, } @inproceedings{23079, author = {{Pai, Arathi and Trächtler, Ansgar and Schaper, Mirko}}, booktitle = {{IFAC 1st Conference on Modelling, Identification and Control of Nonlinear Systems - MICNON}}, title = {{{Real-Time Compatible Phenomenological Modelling of the Austenitic Phase in Shape Memory Alloys as an Example for Modelling of Materials with Repeatable Non-Linear Characteristics}}}, year = {{2015}}, } @inproceedings{21683, abstract = {{Purpose – This paper aims to present a methodology to help end-users to find appropriate part candidates for the use of the additive manufacturing (AM) technology. These shall be capable of bringing AM into their businesses. The concept furthermore includes approaches for redesigning current available parts and helps to estimate the economic implications of the use of the technology. Design/methodology/approach – The approach starts to discuss general economic aspects for the successful use of AM. While describing the introduction of new technologies into existing businesses, the importance of an appropriate part selection for AM is pointed out. A methodology for a part selection process is presented, and the different criteria are developed. An approach for a redesign of the selected parts, including the gathering of requirements, is given based on different sample parts. A variation of criteria to include measures for product piracy is highlighted. Findings – The methodology has proven applicability in several research and industry projects in aerospace applications. Independent part selections from experts analyzed within a project of the European Space Agency had a 90 per cent overlap with the results. It allows companies with only basic AM knowledge to start a part screening for applicable AM candidates in their own company with a reasonable effort. Originality/value – The methodology for the redesign process helps to identify the main functions of the products targeted and the relevant environment, so one can benefit from the various advantages that AM has to offer. The selection methodology helps to ask the right questions and to reduce the effort.}}, author = {{Lindemann, C. and Jahnke, U. and Reiher, T. and Koch, R.}}, booktitle = {{Rapid Prototyping Journal}}, isbn = {{1355-2546}}, number = {{2}}, pages = {{216--227}}, publisher = {{Emerald}}, title = {{{Towards a sustainable and economic selection of part candidates for Additive Manufacturing}}}, doi = {{https://doi.org/10.1108/RPJ-12-2014-0179}}, volume = {{21}}, year = {{2015}}, } @inproceedings{21684, abstract = {{Additive Manufacturing offers a high potential in aerospace industry due to its freedom of design and the ability to manufacture complex and lightweight parts. The low number of units, high quality standards and fast response time are special challenges that have to be met especially in the Maintenance, Repair and Overhaul sector. Thus, companies have to decide at which point it is economic to apply Additive Manufacturing. However, companies lack experience on this new technology. This is why a tool is required that takes into account the above mentioned crucial points and supports the decision process. The paper analyzes aviation’s characteristics with regard to Additive Manufacturing. The structure of current MRO repair workflows is investigated to identify a feasible application for Additive Manufacturing. Additionally the supply chain will be examined to indicate the benefit which the technology can generate in this highly demanding field. The findings are integrated into a methodology that supports the decision whether to apply Additive Manufacturing on the basis of costs, time and quality.}}, author = {{Deppe, G. and Lindemann, C. and Koch, R.}}, booktitle = {{26th Annual International Solid Freeform Fabrication Symposium}}, pages = {{1560--1563}}, title = {{{Developement of an economic decision support for the application of Additive Manufacturing in aerospace}}}, doi = {{http://utw10945.utweb.utexas.edu/sites/default/files/2015/2015-125-Deppe.pdf}}, volume = {{26}}, year = {{2015}}, } @inproceedings{21685, abstract = {{Presently the implications Additive Manufacturing (AM) on intellectual properties are discussed in public. Here AM is often mentioned as a driver for product piracy as it allows to produce and to copy objects with any geometries. Imitators need a lot of information to copy an object accurately. As reverse engineering has been identified as the most important information source for product imitators, AM can also help to reduce the threat of product piracy when correctly applied in the product development. Due to the layer wise production process that allows the manufacturing of very complex shapes and geometries, the reverse-engineering process can be complicated by far. By this, quite contrary to the public opinion, AM can increase the needed effort of imitators and strongly reduce the economic efficiency of product piracy. This paper will show different protection measures and a methodological approach of how to apply these measures to a product. Beside the protective effect some measures allow a traceability of parts over the product’s lifecycle and thus support the quality management of AM processes and additively produced parts. }}, author = {{Jahnke, U. and Büsching, J. and Reiher, T. and Koch, R.}}, booktitle = {{26th Annual International Solid Freeform Fabrication Symposium}}, pages = {{1601--1611}}, title = {{{Protection measures against product piracy and application by the use of AM}}}, doi = {{http://utw10945.utweb.utexas.edu/sites/default/files/2015/2015-128-Jahnke.pdf}}, volume = {{26}}, year = {{2015}}, } @inproceedings{21686, abstract = {{Additive Manufacturing (AM) offers high potential due to its freedom of design for structural parts. Especially in combination with FE-based topology optimization an optimal use of material and thus significant weight reductions can be expected. However, the application of AM is hampered by different additional manufacturing processes along the entire production chain and data handling induced restrictions.Disadvantages emerge from a lack of adjustment of the entire design process for AM. First the optimization algorithms are not targeted to the opportunities and restrictions of AM –represented by design rules – like the design of support structures. Secondly, the CAD software is not adjusted to AM in particular. Creating freeform shaped surfaces based on the optimization results is significantly less convenient than building defined blocks or turning parts following the needs of conventional machining. The indispensable subsequent interpretation of optimization results regarding the design rules and the possibilities of CAD-tools counteracts optimal results. This paper considers different approaches for a Topology Optimization (TO)-shape regaining on different sample parts including telecommunication satellite parts. An innovative design methodology is presented getting crucial for creating high quality designs. }}, author = {{Reiher, T. and Koch, R.}}, booktitle = {{26th Annual International Solid Freeform Fabrication Symposium}}, pages = {{1092--1103}}, title = {{{FE-Optimization and data handling for Additive Manufacturing of structural parts}}}, doi = {{http://utw10945.utweb.utexas.edu/sites/default/files/2015/2015-90-Reiher.pdf}}, volume = {{26}}, year = {{2015}}, } @inproceedings{21700, author = {{Jahnke, U. and Lindemann, C.}}, booktitle = {{Inside 3D Printing Conference and Expo}}, title = {{{Sustainable Part Selection for the Use of Additive Manufacturing in Companies Focussing on Prevention of Product Piracy}}}, year = {{2015}}, } @inproceedings{21701, abstract = {{The aerospace sector is characterized by long product life cycles and a need for lightweight design. Additive manufacturing is a technology that produces parts layer by layer and thus enables the manufacturing of any complex parts at nearly no extra costs. A topology optimization enhances the part’s performance for their special purpose. The results are often complex bionic structures that cannot be produced with conventional manufacturing technologies. The paper analyzes how the high potential of this technology can be applied to aerospace parts. A topology optimization will be conducted for an aircraft part explaining the crucial points and a life cycle analysis examines the achieved sustainable improvements for the aircraft’s life cycle.}}, author = {{Deppe, G. and Reiher, T. and Koch, R.}}, booktitle = {{International Conference Production Engineering and Management 2015}}, isbn = {{9783941645110}}, pages = {{219--230}}, title = {{{Exploring the cost and lifetime benefits of a topology optimized aerospace part applying additive manufacturing}}}, doi = {{https://www.th-owl.de/elsa/download/335/336/PEM_Tagung_zusammen2015.pdf}}, volume = {{5}}, year = {{2015}}, }