Effective simulation of the mechanics of longitudinal tensile failure of unidirectional polymer composites
An efficient computational model to simulate tensile failure of both hybrid and non-hybrid composite materials is proposed. This model is based on the spring element model, which is extended to a random 2D fibre packing. The proposed model is used to study the local stress fields around a broken fibre as well as the failure process in composite materials. The influence of fibre strength distributions and matrix properties on this process is also analysed. A detailed analysis of the fracture process and cluster development is performed and the results are compared with experimental results from the literature.
KeywordsComposites Fracture Strength Numerical modelling
The first author acknowledges the support of the Portuguese Government’s Fundação para a Ciência e Tecnologia, under the Grant SFRH/BD/115872/2016. The second gratefully acknowledges the funding of Project NORTE-01-0145-FEDER-000022 SciTech Science and Technology for Competitive and Sustainable Industries, cofinanced by Programa Operacional Regional do Norte (NORTE2020), through Fundo Europeu de Desenvolvimento Regional (FEDER). The last author gratefully acknowledges the funding of Project PTDC/EMS-PRO/4732/2014, cofinanced by Programa Operacional Competitividade e Internacionalização and Programa Operacional Regional de Lisboa, through Fundo Europeu de Desenvolvimento Regional (FEDER) and by National Funds through FCT—Fundação para a Ciência e Tecnologia. The authors would like to thank the support of Dr. Stephane Mahdi, Dr. Christian Weimer and Christian Metzner (AIRBUS).
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