Experimental investigations and modeling of volume change induced by void growth in polyamide 11

被引:73
作者
Boisot, G. [1 ,2 ,3 ]
Laiarinandrasana, L. [1 ]
Besson, J. [1 ]
Fond, C. [3 ]
Hochstetter, G. [2 ]
机构
[1] MINES ParisTech, Ctr Mat, CNRS UMR 7633, F-91003 Evry, France
[2] ARKEMA Cerdato, F-27470 Serquigny, France
[3] Inst Charles Sadron, CNRS UPR 22, F-67034 Strasbourg 2, France
关键词
Polymers; Damage mechanics; Volume change; Hydrostatic pressure; Finite element; POLYVINYLIDENE FLUORIDE; PLASTIC-DEFORMATION; CONSTITUTIVE MODEL; DAMAGE BEHAVIOR; CAVITATION; POLYMER; EQUILIBRIUM; FRACTURE; STRAINS; SOLIDS;
D O I
10.1016/j.ijsolstr.2011.05.016
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Polymers are known to be sensitive to hydrostatic pressure. The influence of stress triaxiality ratio on cavitation and damage has been highlighted in numerous studies. This paper proposes experimental investigations allowing the control of both the stress triaxiality ratio and the void distribution via microscopic observations of microtome-cut surfaces from interrupted tests. With the help of a finite element code, the Gurson-Tvergaard-Needleman model was calibrated by using these multi-scale experimental data. Then comparison between both numerical and analytical models and experimental data was performed. Bridgman formulae were reported to be valid up to the peak load. Moreover, a better understanding of the time evolution of significant parameters such as the porosity (volume change) and the stress triaxiality ratio (hydrostatic pressure), was highlighted. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2642 / 2654
页数:13
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