期刊
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
卷 95, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.euromechsol.2022.104598
关键词
Fiber reinforced composites; Anisotropic fracture toughness; Stochastic fiber orientations; Anisotropy ratio; Crack deflection; Finite elements
类别
Due to the production process, short fiber reinforced composites exhibit significant anisotropy in both elastic properties and crack growth resistance. The influence of crack deflection on accurate prediction of crack paths must be considered. Statistical variations in fiber orientations and fiber-matrix adhesion lead to stochasticity in local fracture toughness anisotropy.
Owing to the production process, short fiber reinforced composites exhibit a pronounced anisotropy of both elastic properties and crack growth resistance. In particular the latter issue has a major impact on crack deflection and inevitably has to be taken into account for the sake of an accurate prediction of crack paths. The perpendicular axes of transverse isotropy are associated with the fiber orientations, whereupon a crack in transverse direction encounters the largest fracture toughness. While the local mean fiber orientations in polymer matrix composites are determined by the injection molding process, their statistical fluctuations can approximately be described in terms of Gaussian random field models. Furthermore, statistical variations of the volume fraction of fibers and the fiber-matrix adhesion give rise to stochasticity of the local ratio of fracture toughness anisotropy. Influencing factors of prediction regions of crack paths obtained from finite element simulations with an adapted J-integral deflection criterion are investigated, just as stochastic aspects of bifurcation phenomena of crack deflection observed under mode-I loading.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据