damage mechanics;
finite element analysis (FEA);
impact behavior;
crack-weakened composites;
D O I:
10.1016/S1359-8368(01)00048-8
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
A micromechanical approach recently proposed by Lee and Simunovic [Compos, Part B: Engng. 31 (2000) 77] is introduced to develop analytical and numerical models that efficiently predict the behavior of chopped fiber based composites containing microcracks under impact loading. Based on the ensemble-volume averaging process and the first-order effects of eigenstrains due to the existence of chopped fibers and microcracks, an effective yield criterion of the composites is derived. Microcracks in the matrix are considered by employing the Eshelby's equivalence principle and their influence on the stress-strain relations of the composites is investigated. Further, the Weibull's probabilistic function is used to model the varying probability of progressive partial fiber debonding. The developed micromechanical constitutive model is then implemented into the finite element code DYNA3D to perform impact simulation of the composites. Finally, numerical simulations for cantilever beam test and composite contact test are carried out to validate the finite element implementation and predict the impact behavior of composite structures. (C) 2002 Published by Elsevier Science Ltd.
机构:
Univ Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA 90095 USAUniv Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA 90095 USA
Ju, JW
;
Lee, HK
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA 90095 USAUniv Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA 90095 USA
机构:Universitéde Technologie de Compiègne, Laboratoire de Génie Mécanique pour les Matériaux et les Structures, LG2mS-Polymères et Composites, Centre de Recherches Royallieu, BP 649
MERAGHNI, F
;
BENZEGGAGH, ML
论文数: 0引用数: 0
h-index: 0
机构:Universitéde Technologie de Compiègne, Laboratoire de Génie Mécanique pour les Matériaux et les Structures, LG2mS-Polymères et Composites, Centre de Recherches Royallieu, BP 649
机构:
Univ Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA 90095 USAUniv Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA 90095 USA
Ju, JW
;
Lee, HK
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA 90095 USAUniv Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA 90095 USA
机构:Universitéde Technologie de Compiègne, Laboratoire de Génie Mécanique pour les Matériaux et les Structures, LG2mS-Polymères et Composites, Centre de Recherches Royallieu, BP 649
MERAGHNI, F
;
BENZEGGAGH, ML
论文数: 0引用数: 0
h-index: 0
机构:Universitéde Technologie de Compiègne, Laboratoire de Génie Mécanique pour les Matériaux et les Structures, LG2mS-Polymères et Composites, Centre de Recherches Royallieu, BP 649