@article{KastenmeierSchmidEhrlichetal., author = {Kastenmeier, Andreas and Schmid, Vinzent and Ehrlich, Ingo and Petratos, P. and Mourtos, N. and Trafalis, T.}, title = {Specimen Preparation and Material Characterization of Filament Wound GFRP Composite Tubes}, series = {Athens Journal of Technology \& Engineering}, volume = {4}, journal = {Athens Journal of Technology \& Engineering}, number = {3}, pages = {191 -- 205}, abstract = {Filament wound composite structures are widely used in the field of pressure vessels, tubes, pipelines or rocket cases. The mechanical behavior of these structures is typically different from those of flat laminated structures due to an alternating lay-up sequence, winding tension and manufacturing induced imperfections. However, design and analysis issues require the same engineering data as used for laminated structures in general. It has therefore become necessary to establish an accompanying quality assurance procedure following the production process to identify the material properties of the manufactured tubes especially for the single layer. Consequently, there are three different approaches of determining the elastic moduli and tensile strengths of a filament wound laminate. Either specimens are resected from a curved tube, from a tube with plane areas or standardized flat specimens are manufactured under deviating production conditions. All approaches entail disadvantages, whether in terms of manufacturing or testing parameters including geometry, lay-up sequence, porosity, fiber tension and load direction. This study presents the discrepancies in the determination of mechanical properties of a filament wound glass-fiber-reinforced polymer tube on curved or cylindrical specimens and flat specimens produced to meet the specifications of international standards. In order to obtain material properties not only in longitudinal but also in transverse direction of the tubes, the so-called split-disk tensile test modeled after ASTM Standard D 2290, is used with tube segments.The procedures of specimen production and preparation are described in detail. Material properties such as the fiber volume and void content of the composite specimens are conducted in order to consider quality and production differences. Finally tensile tests are performed and the results are compared and discussed.}, language = {en} } @inproceedings{FritzSchmidEhrlich, author = {Fritz, B. and Schmid, Vinzent and Ehrlich, Ingo}, title = {Analytical and numerical shear stress analysis of adhesive structural bonded joints under tension load}, series = {Applied Research Conference 2014 - ARC 2014, 5th July 2014, Ingolstadt}, booktitle = {Applied Research Conference 2014 - ARC 2014, 5th July 2014, Ingolstadt}, editor = {Ziemann, Olaf and Mottok, J{\"u}rgen and Pforr, Johannes}, publisher = {Shaker}, address = {Aachen}, pages = {266 -- 271}, language = {de} } @inproceedings{WaetzigSchmidEhrlich, author = {W{\"a}tzig, A. and Schmid, Vinzent and Ehrlich, Ingo}, title = {Damage Modelling of Adhesive Joints Using the Cohesive Zone Model}, series = {Applied Research Conference 2016 - ARC 2016, Augsburg, 24 June 2016}, booktitle = {Applied Research Conference 2016 - ARC 2016, Augsburg, 24 June 2016}, editor = {Mottok, J{\"u}rgen and Reichenberger, Marcus and Stolle, Reinhard}, publisher = {Pro Business Verlag}, address = {Berlin}, language = {en} } @inproceedings{BrulandSchmidEhrlich, author = {Bruland, Matthias and Schmid, Vinzent and Ehrlich, Ingo}, title = {Analyzing and Testing of a Single Solution of Self-cutting Thread Inserts in Composites}, series = {Applied Research Conference 2014 - ARC 2014, 5th July 2014, Ingolstadt}, booktitle = {Applied Research Conference 2014 - ARC 2014, 5th July 2014, Ingolstadt}, editor = {Ziemann, Olaf and Mottok, J{\"u}rgen and Pforr, Johannes}, publisher = {Shaker}, pages = {286 -- 288}, language = {en} } @inproceedings{NiebauerSchmidEhrlich, author = {Niebauer, M. and Schmid, Vinzent and Ehrlich, Ingo}, title = {Failure Criteria of Adhesively Bonded Joints}, series = {Applied Research Conference 2015 - ARC 2015, N{\"u}rnberg, 3rd July 2015 - 16. Juli 2015}, booktitle = {Applied Research Conference 2015 - ARC 2015, N{\"u}rnberg, 3rd July 2015 - 16. Juli 2015}, editor = {Mottok, J{\"u}rgen and Reichenberger, Marcus and Scharfenberg, J. and Ziemann, Olaf}, publisher = {Pro Business Verlag}, address = {Berlin}, isbn = {978-3863869458}, pages = {347 -- 351}, language = {en} }