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Bruyneel M, Naito T, Urushiyama Y, et al. Predictive simulations of damage propagation in laminated composite materials and structures with SAMCEF[J]. Sae Technical Papers, 2015, 2015. Composite materials have been used successfully in the aerospace industry for many years due to their light weight and high mechanical performances. At the opposite, the amount of carbon fiber reinforced plastics (CFRP) used in the automotive industry is still limited to very specific applications and still not really appears as a reliable solution as far as structural heavily loaded components are concerned. However, vehicle manufacturers and tier suppliers are facing the challenge of consistently maintaining high quality endproduct with safety constraints while designing lightweight structures with fuel economy concerns. Carbon fiber-reinforced plastics, because of their high strength to density ratio, represent a serious alternative to classical metallic approach but generate the need to completely redefine the design and sizing methodology of the structural parts. Indeed, composites exhibit complex material behaviors, especially when the assumption of linearity cannot be done anymore. Moreover, composite materials and structures have complex failure modes, which must be well controlled in the sizing process. In this context, predictive simulation tools can be a helpful companion to the physical tests. In order to propose predictive simulation tools, it is important to use material models able to represent the different modes of degradation of the plies forming the laminated composite structure. Although delamination is a very important mode of failure, intra-laminar failure modes can’t be ignored. Inter- and intra-laminar damage modes are studied in this paper, and progressive damages impacting delamination, matrix cracking, fibers breaking, and de-cohesion between fibers and matrix are considered.  3.jpg |
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