A damage mechanics model of crack-weakened, chopped fiber composites under impact loading

被引:16
作者
Lee, HK [1 ]
Simunovic, S
机构
[1] Univ Miami, Dept Civil Architectural & Environm Engn, Coral Gables, FL 33124 USA
[2] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA
关键词
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.
引用
收藏
页码:25 / 34
页数:10
相关论文
共 17 条
[1]   MICROMECHANICS AND EFFECTIVE MODULI OF ELASTIC COMPOSITES CONTAINING RANDOMLY DISPERSED ELLIPSOIDAL INHOMOGENEITIES [J].
JU, JW ;
CHEN, TM .
ACTA MECHANICA, 1994, 103 (1-4) :103-121
[2]   EFFECTIVE ELASTIC-MODULI OF 2-PHASE COMPOSITES CONTAINING RANDOMLY DISPERSED SPHERICAL INHOMOGENEITIES [J].
JU, JW ;
CHEN, TM .
ACTA MECHANICA, 1994, 103 (1-4) :123-144
[3]   A micromechanical damage model for effective elastoplastic behavior of ductile matrix composites considering evolutionary complete particle debonding [J].
Ju, JW ;
Lee, HK .
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, 2000, 183 (3-4) :201-222
[4]   COMPOSITE PANELS CONTAINING MULTIPLE THROUGH-THE-WIDTH DELAMINATIONS AND SUBJECTED TO COMPRESSION .1. ANALYSIS [J].
KUTLU, Z ;
CHANG, FK .
COMPOSITE STRUCTURES, 1995, 31 (04) :273-296
[5]   Modeling of progressive damage in aligned and randomly oriented discontinuous fiber polymer matrix composites [J].
Lee, HK ;
Simunovic, S .
COMPOSITES PART B-ENGINEERING, 2000, 31 (02) :77-86
[6]   A damage constitutive model of progressive debonding in aligned discontinuous fiber composites [J].
Lee, HK ;
Simunovic, S .
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 2001, 38 (05) :875-895
[7]   A computational approach to the investigation of impact damage evolution in discontinuously reinforced fiber composites [J].
Lee, HK .
COMPUTATIONAL MECHANICS, 2001, 27 (06) :504-512
[8]  
LEE HK, 1999, ORNLTM1999158
[9]  
MATZENMILLER A, 1991, CRASHWORTHINESS SIMU
[10]   MICROMECHANICAL MODELING OF MATRIX DEGRADATION IN RANDOMLY ORIENTED DISCONTINUOUS-FIBER COMPOSITES [J].
MERAGHNI, F ;
BENZEGGAGH, ML .
COMPOSITES SCIENCE AND TECHNOLOGY, 1995, 55 (02) :171-186