2014
|
Valentino, P.; Sgambitterra, E.; Furgiuele, F.; Romano, M.; Ehrlich, I.; Gebbeken, N. Mechanical characterization of basalt woven fabric composites: numerical and experimental investigation. Leichtbau Artikel In: Frattura ed Integrità Strutturale (Fracture and Structural Integrity), Bd. 8, Nr. 28, S. 1-11, 2014, ISSN: 1971-8993. @article{Valentino2014,
title = {Mechanical characterization of basalt woven fabric composites: numerical and experimental investigation.},
author = {P. Valentino and E. Sgambitterra and F. Furgiuele and M. Romano and I. Ehrlich and N. Gebbeken},
url = {http://www.gruppofrattura.it/ors/index.php/fis/article/view/1229
http://www.gruppofrattura.it/ors/index.php/fis/article/view/1229/1182
http://www.gruppofrattura.it/ors/index.php/fis/article/download/1229/1182
},
doi = {10.3221/IGF-ESIS.28.01},
issn = {1971-8993},
year = {2014},
date = {2014-04-08},
journal = {Frattura ed Integrità Strutturale (Fracture and Structural Integrity)},
volume = {8},
number = {28},
pages = {1-11},
abstract = {Basalt fabric composite, with different twill wave reinforcements, i.e. twill 2/2 and twill 1/3, have been studied in this work by means of experimental tests and numerical finite element (FE) simulations. As fabric reinforcements show repeating undulations of warp and fill yarn, simple mixtures law cannot be applied. As a consequence, the mesoscopic scale, lying between the microscopic and the macroscopic one, has to be taken into account to mechanically characterize a fabric reinforced composite. The aim of this work is to evaluate the stiffness of a fabric reinforced composite in warp and fill direction. In particular a numerical FE model, assuming elliptical sections and sinusoidal shape of the yarns, has been implemented and experimental tests have been carried out in order to validate the proposed model. Finally, the strength and the failure modes of the composite material, for each analysed structure and textile orientation, have been experimentally investigated.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Basalt fabric composite, with different twill wave reinforcements, i.e. twill 2/2 and twill 1/3, have been studied in this work by means of experimental tests and numerical finite element (FE) simulations. As fabric reinforcements show repeating undulations of warp and fill yarn, simple mixtures law cannot be applied. As a consequence, the mesoscopic scale, lying between the microscopic and the macroscopic one, has to be taken into account to mechanically characterize a fabric reinforced composite. The aim of this work is to evaluate the stiffness of a fabric reinforced composite in warp and fill direction. In particular a numerical FE model, assuming elliptical sections and sinusoidal shape of the yarns, has been implemented and experimental tests have been carried out in order to validate the proposed model. Finally, the strength and the failure modes of the composite material, for each analysed structure and textile orientation, have been experimentally investigated. |
Romano, M.; Micklitz, M.; Olbrich, F.; Bierl, R.; Ehrlich, I.; Gebbeken, N. Experimental investigation of damping properties of unidirectionally and fabric reinforced plastics by the free decay method Leichtbau Artikel In: Journal of Achievements in Materials and Manufacturing Engineering (JAMME), Bd. 63, Nr. 2, S. 65-80, 2014, ISSN: 1734-8412. @article{Romano2014e,
title = {Experimental investigation of damping properties of unidirectionally and fabric reinforced plastics by the free decay method},
author = {M. Romano and M. Micklitz and F. Olbrich and R. Bierl and I. Ehrlich and N. Gebbeken
},
url = {http://www.journalamme.org/index.php?id=250
http://www.journalamme.org/vol63_2/6323.pdf
},
issn = {1734-8412},
year = {2014},
date = {2014-04-01},
urldate = {2014-04-01},
journal = {Journal of Achievements in Materials and Manufacturing Engineering (JAMME)},
volume = {63},
number = {2},
pages = {65-80},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Putzer, M.; Rasmussen, J.; Ehrlich, I.; Gebbeken, N.; Dendorfer, S. Muskuloskelettale Simulation zur Untersuchung des Einflusses geometrischer Parameter der Wirbelkörper auf die Belastung der Lendenwirbelsäule. Leichtbau Forschungsbericht Ostbayerische Hochschule Regensburg inixmedia GmbH Marketing & Medienberatung, Forschungsbericht 2013, 2014. @techreport{Putzer2014,
title = {Muskuloskelettale Simulation zur Untersuchung des Einflusses geometrischer Parameter der Wirbelkörper auf die Belastung der Lendenwirbelsäule.},
author = {M. Putzer and J. Rasmussen and I. Ehrlich and N. Gebbeken and S. Dendorfer},
editor = {Ostbayerische Technische Hochschule},
year = {2014},
date = {2014-01-01},
address = {inixmedia GmbH Marketing & Medienberatung},
institution = {Ostbayerische Hochschule Regensburg},
abstract = {Zur Simulation von patientenspezifischen Belastungen in der Lendenwirbelsäule werden muskuloskelettale Modelle mit patientenspezifischer Geometrie verwendet. Diese Daten besitzen allerdings eine inhärente Ungenauigkeit. Diese Studie untersuchte den Einfluss definierter geometrischer Parameter auf die Lasten in der Lendenwirbelsäule anhand eines parametri-sierten muskuloskelettalen Modells in vier verschiedenen Körperhaltungen: aufrecht stehend, vorgebeugt, zur Seite gedreht und zur Seite geneigt. Variiert wurden die Abmessungen des Wirbelkörpers, des Wirbelbogens und der Dornfortsätze sowie die Orientierung der Facettengelenke und die Krümmung der Lendenwirbelsäule. Anschließend wurden die Parameter mit den größten Einflüssen in weiteren Simulationen kombiniert. Die Änderung der Last zwischen L4 und L5 wurde als Ziel der Untersuchung festgelegt. Die größten Lastunterschiede ergaben sich durch die Änderung der Wirbelkörperhöhe, der Band-scheibenhöhe, der Wirbelkörpertiefe und der Krümmung der Lendenwirbelsäule.},
type = {Forschungsbericht 2013},
keywords = {},
pubstate = {published},
tppubtype = {techreport}
}
Zur Simulation von patientenspezifischen Belastungen in der Lendenwirbelsäule werden muskuloskelettale Modelle mit patientenspezifischer Geometrie verwendet. Diese Daten besitzen allerdings eine inhärente Ungenauigkeit. Diese Studie untersuchte den Einfluss definierter geometrischer Parameter auf die Lasten in der Lendenwirbelsäule anhand eines parametri-sierten muskuloskelettalen Modells in vier verschiedenen Körperhaltungen: aufrecht stehend, vorgebeugt, zur Seite gedreht und zur Seite geneigt. Variiert wurden die Abmessungen des Wirbelkörpers, des Wirbelbogens und der Dornfortsätze sowie die Orientierung der Facettengelenke und die Krümmung der Lendenwirbelsäule. Anschließend wurden die Parameter mit den größten Einflüssen in weiteren Simulationen kombiniert. Die Änderung der Last zwischen L4 und L5 wurde als Ziel der Untersuchung festgelegt. Die größten Lastunterschiede ergaben sich durch die Änderung der Wirbelkörperhöhe, der Band-scheibenhöhe, der Wirbelkörpertiefe und der Krümmung der Lendenwirbelsäule. |
Valentino, P.; Romano, M.; Ehrlich, I.; Furgiuele, F.; Gebbeken, N. Mechanische Charakterisierung von basaltfaser-verstärkten Kunststoffen mit Gewebeverstärkung – Numerische und experimentelle Untersuchungen. Leichtbau Forschungsbericht Ostbayerische Hochschule Regensburg inixmedia GmbH Marketing & Medienberatung, Forschungsbericht 2013, 2014. @techreport{Valentino2014b,
title = {Mechanische Charakterisierung von basaltfaser-verstärkten Kunststoffen mit Gewebeverstärkung – Numerische und experimentelle Untersuchungen.},
author = {P. Valentino and M. Romano and I. Ehrlich and F. Furgiuele and N. Gebbeken},
editor = {Ostbayerische Technische Hochschule},
year = {2014},
date = {2014-01-01},
address = {inixmedia GmbH Marketing & Medienberatung},
institution = {Ostbayerische Hochschule Regensburg},
abstract = {This paper describes the results of tensile tests and finite element (FE) calculations with representative volume elements (RVEs) of basalt fibre reinforced plastic with two different types of fabric reinforcements. As fabric reinforcements show repeating ondulations of warp and fill yarn, simple mixtures laws reach their limits. The aim of this work is to determine the stiffness of a fabric reinforced composite in warp and fill direction with numerical investigations. The tensile tests and the FE-calculations have been carried out for two different types of basalt fabrics, namely twill 2/2 and twill 1/3. The comparison between the experimental data and the results of the FE-calculations are provided in order to support the validity of the proposed model.},
type = {Forschungsbericht 2013},
keywords = {},
pubstate = {published},
tppubtype = {techreport}
}
This paper describes the results of tensile tests and finite element (FE) calculations with representative volume elements (RVEs) of basalt fibre reinforced plastic with two different types of fabric reinforcements. As fabric reinforcements show repeating ondulations of warp and fill yarn, simple mixtures laws reach their limits. The aim of this work is to determine the stiffness of a fabric reinforced composite in warp and fill direction with numerical investigations. The tensile tests and the FE-calculations have been carried out for two different types of basalt fabrics, namely twill 2/2 and twill 1/3. The comparison between the experimental data and the results of the FE-calculations are provided in order to support the validity of the proposed model. |
Eisenried, M.; Romano, M.; Jungbauer, B.; Ehrlich, I.; Gebbeken, N. Herstellung von unidirektional verstärkten Prepregs im Labormaßstab – Einfluss von Fertigungsparametern auf die Materialqualität. Leichtbau Forschungsbericht Ostbayerische Hochschule Regensburg inixmedia GmbH Marketing & Medienberatung, Forschungsbericht 2013, 2014. @techreport{Eisenried2014,
title = {Herstellung von unidirektional verstärkten Prepregs im Labormaßstab – Einfluss von Fertigungsparametern auf die Materialqualität.},
author = {M. Eisenried and M. Romano and B. Jungbauer and I. Ehrlich and N. Gebbeken},
editor = {Ostbayerische Technische Hochschule},
year = {2014},
date = {2014-01-01},
address = {inixmedia GmbH Marketing & Medienberatung},
institution = {Ostbayerische Hochschule Regensburg},
abstract = {A prepreg production device in laboratory scale is used to develop the production process of unidirectionally reinforced prepregs. The aim of the prepreg production machine is to impregnate different types of reinforcement fibers with an arbitrarily selectable thermoset matrix system that completely satisfies the requirements for autoclave processing. To identify the parameters of the production process and investigate its sensitivity on the quality of the semi-finished product, experimental investigations regarding fiber volume content and resin flow while curing are carried out with specimens out of test panels cured in autoclave processing. The investigated parameter is the width of the wiping gap and its effects on fiber volume content and resin flow. The parameter clearly affects both properties so that a proper impregnation and curing process can be achieved by optimizing the parameter to desired values.},
type = {Forschungsbericht 2013},
keywords = {},
pubstate = {published},
tppubtype = {techreport}
}
A prepreg production device in laboratory scale is used to develop the production process of unidirectionally reinforced prepregs. The aim of the prepreg production machine is to impregnate different types of reinforcement fibers with an arbitrarily selectable thermoset matrix system that completely satisfies the requirements for autoclave processing. To identify the parameters of the production process and investigate its sensitivity on the quality of the semi-finished product, experimental investigations regarding fiber volume content and resin flow while curing are carried out with specimens out of test panels cured in autoclave processing. The investigated parameter is the width of the wiping gap and its effects on fiber volume content and resin flow. The parameter clearly affects both properties so that a proper impregnation and curing process can be achieved by optimizing the parameter to desired values. |
