Development and implementation of a multi-scale model for matrix micro-cracking prediction in composite structures subjected to low velocity impact

被引:18
作者
Berton, Thomas [1 ]
Najafi, Farzin [2 ]
Singh, Chandra Veer [1 ,2 ]
机构
[1] Univ Toronto, Dept Mat Sci & Engn, 184 Coll St,Suite 140, Toronto, ON M5S 3E4, Canada
[2] Univ Toronto, Dept Mech & Ind Engn, 5 Kings Coll Rd, Toronto, ON M5S 3G8, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Damage mechanics; Computational modelling; Finite element analysis; Impact behavior; Micro-mechanics; PROGRESSIVE FAILURE; LAMINATED COMPOSITES; DAMAGE MECHANISMS; PLY CRACKS; BEHAVIOR; DELAMINATION; SIMULATION; COMPRESSION; TESTS; BEAMS;
D O I
10.1016/j.compositesb.2018.12.033
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this paper, a novel multi-scale damage model has been developed to predict the progression of matrix micro-cracking in a prototype car bumper under low-velocity impact. The methodology is based on FE micro-damage modelling to calibrate the parameters of a Synergistic Damage Mechanics model considering multi-axial loading, combined with a matrix micro-crack multiplication model. Python scripting was used to model a series of micro-mechanical FE models to determine the damage parameters, which were then used to simulate damage evolution at the structural scale, using a VUMAT subroutine. Following validation, the effects of the impactor's initial velocity, stacking sequence, rate-dependency and bumper's cross sectional profile have been evaluated for different material systems. The patterns of damage progression show that the damage model can accurately predict the progression of matrix micro-cracking, paving the way for the utilization of accurate multi-scale analysis tools in composite structures.
引用
收藏
页码:140 / 151
页数:12
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