Numerical simulation of tensile performance of polymers
The tensile deformation behavior of polycarbonate (PC) and the alloy of PC and acrylonitrile-butadiene-styrene (PC/ABS) are investigated experimentally and numerically in this paper. The unusual volume deformation ratios measured with three-dimensional digital image correlation (DIC) method are discussed through the numerical simulation of the deformation process. Linear Drucker-Prager yield model is used to simulate the tensile deformation behavior of PC and PC/ABS. It is found that there is no significant plastic volume deformation during tensile deformation of PC. The volume deformation measured in the experiment of PC is partly due to the elastic volume deformation,which is linearly related to the equivalent pressure stress,and partly due to the improper assumption of keeping as square section during the necking deformation stage at the minimum section of specimens. The volume deformation of PC/ABS in tensile deformation is consisted of elastic part,which is also linearly related to the equivalent pressure stress,and the plastic part,which is linearly related with the true axial strain. The difference of two lateral contraction ratios for both polymers is found to be due to the different lateral dimensions,which cause different constraints in these directions.
Large tensile strain Volume deformation Numerical simulation Linear Drucker-Prager yield model Polymer
Qin-Zhi Fang Hyeon-Gyu Beom Song Lin Hui-Min Li
MOE Key Laboratory for the Strength and Vibration of Mechanical Structures,Xian Jiaotong University Department of Mechanical Engineering,Inha University,Incheon 420-751,Korea MOE Key Laboratory for the Strength and Vibration of Mechanical Structures,Xian Jiaotong University
国际会议
Fracture Mechanics and Applications 2008(国际断裂力学2008年年会)(FM2008)
杭州
英文
117-122
2008-10-31（万方平台首次上网日期，不代表论文的发表时间）