Void nucleation and growth in mineral-filled PVC - An experimental and numerical study

被引：25
|
作者：
Ognedal, Anne Serine [1 ,2 ]
Clausen, Arild H. [1 ,2 ]
Berstad, Torodd [1 ,2 ]
Seelig, Thomas [3 ]
Hopperstad, Odd Sture [1 ,2 ]
机构：
[1] Norwegian Univ Sci & Technol NTNU, Struct Impact Lab SIMLab, NO-7491 Trondheim, Norway
[2] Norwegian Univ Sci & Technol NTNU, Dept Struct Engn, NO-7491 Trondheim, Norway
[3] KIT, Inst Mech, D-76131 Karlsruhe, Germany
来源：
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES | 2014年 / 51卷 / 7-8期
关键词：
Composite materials; Debonding; Plastics; Polymers; Tensile; Tension; Voids; Finite element; Damage; Void nucleation; Void growth; Unit cell simulation; Scanning electron microscopy; SEM; Ductile fracture; GLASSY-POLYMERS; MECHANICAL-PROPERTIES; SEMICRYSTALLINE POLYMER; PLASTIC-DEFORMATION; CALCIUM-CARBONATE; BLENDS; DAMAGE; MODEL; COMPOSITES; PARTICLES;
D O I：
10.1016/j.ijsolstr.2013.12.042
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The nucleation and growth of voids in mineral-filled PVC have been investigated through experimental and numerical studies. Uniaxial tensile specimens were deformed in tension to different elongation levels and then unloaded. The macroscopic strain fields were recorded by use of digital image correlation. After the test, the microstructure of the deformed specimens was investigated in a scanning electron microscope. It was found that the observed volume strain on the macroscale is related to void growth on the microscale. In addition, finite element simulations were performed on unit cell models representing the microstructure of the material in a simplified manner. The numerical simulations demonstrate macroscopic dilation as a result of void growth. Moreover, the numerical simulations indicate that the experimentally observed stress-softening response of the PVC composite material may result from matrix-particle debonding. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1494 / 1506
页数：13
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