EFFECT OF TRIAXIAL STRESS CONSTRAINT ON THE DEFORMATION AND FRACTURE OF POLYMERS

作     者：王铁军 Kikno Kishimoto Mitsuo Notomi 

作者机构：Department of Engineering MechanicsXi'an Jiaotong UniversityXi'an 710049China Department of Mechanical and Control EngineeringTokyo Institute of TechnologyTokyo 152-8552Japan Department of Mechanical EngineeringMeiji UniversityKawasaki-shiKanagawa 214-8571Japan 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2002年第18卷第5期

页      面：480-493页

核心收录：

学科分类：08[工学] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：The project supported by the National Natural Science Foundation of China (10125212) the Trans-Century Training Program Foundation and the Key Research Fund of the Education Ministry of China (01159) 

主　　题：deformation fracture toughening cavitation crazev micromechanics PC ABS polymer alloy 

摘      要：One purpose of this paper is to give a brief overview on the research status of deformation,fracture and toughening mechanisms of polymers,including experimental,theoretical and numerical *** is on the more recent progresses of micromechanics of rubber particle cavitation and crazing,and the de- velopment of fracture criteria for ductile polymers. The other purpose is to study the effect of triaxial stress constraint on the deforma- tion and fracture behavior of ***(PC),acrylonitrile-butadiene- styrene(ABS)and PC/ABS alloy are considered in this investigation.A series of circumferentially blunt-notched bars are used to experimentally generate different tri- axial stress *** fracture surfaces of specimens with different notch radius are examined by scanning electron microscope(SEM)to study the fracture and tough- ening mechanisms of polymer *** is shown that the triaxial stress constraint has a significant effect on the deformation,fracture and toughening of PC,ABS and PC/ABS *** will also discuss the extent to which a micromechanies criterion proposed by the first author can serve as a fracture criterion for ductile polymers. A new ductile fracture parameter is emphasized,which can be employed to evaluate the fracture ductility of *** state independence of the parameter for the PC,ABS and PC/ABS alloy has been experimentally verified.