APPLICATIONS OF A DILATATIONAL YIELDING MODEL TO RUBBER-TOUGHENED POLYMERS

被引：152
|
作者：
LAZZERI, A
BUCKNALL, CB
机构：
[1] CRANFIELD UNIV,ADV MAT GRP,BEDFORD MK43 0AL,ENGLAND
[2] UNIV PISA,CTR MAT ENGN,I-56100 PISA,ITALY
来源：
POLYMER | 1995年 / 36卷 / 15期
关键词：
RUBBER TOUGHENING; YIELDING; DILATATION;
D O I：
10.1016/0032-3861(95)94338-T
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A model for dilatational yielding in rubber-toughened polymers, which was proposed in an earlier paper, is developed further. According to the model, deformation begins with cavitation of the rubber particles, and progresses through the growth of dilatational bands, which are cavitated planar yield zones combining inplane shear with extension normal to the band. The model is used to predict band angles and other characteristics of yielding in toughened plastics, including the conditions under which polymers yield without cavitating. Electron micrograph evidence for the formation of dilatation bands is presented, and the influence of these bands on deformation and fracture behaviour is discussed, using a novel method of presentation based on cavitation diagrams.
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页码：2895 / 2902
页数：8
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