Microscopy Photoelasticity for Studying Crazes in Polycarbonate

Microscopy Photoelasticity for Studying Crazes in Polycarbonate
复制标题

用于研究聚碳酸酯裂纹的显微镜光弹性

DOI:
10.4028/www.scientific.net/amm.37-38.648
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发表时间:
2010-11
期刊:
Applied Mechanics and Materials
影响因子:
--
通讯作者:
Jinlong Chen
Jinlong Chen
中科院分区:
其他
文献类型:
--
作者:
Zongtao Wang;Ricao Wang;Jinlong Chen

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利用偏光显微镜研究了聚碳酸酯中裂纹的萌生、扩展和扩展过程。为适应偏光显微镜的需要,设计了一种单轴拉伸加载仪。利用偏光显微镜,可以同时对裂纹和应力场进行在线观察。裂纹尖端的双侧前缘出现裂纹裂纹,裂纹长度方向与最大主应力方向垂直。以裂纹边界应力为裂纹的起始点,裂纹的长度与时间遵循指数规律。狂热的产生、传播和扩大是一个依赖时间的过程。
The initiation, propagation and broadening of crazes in polycarbonate were studied with the aid of polarizing microscopy. A loading instrument supplying uniaxial stretch is designed to match polarizing microscopy. With polarizing microscopy, online observations of crazes and stress field can be done simultaneously. Crazes appear in bilateral anteriority of the crack tip and direction of length is perpendicular to the maximum principal stress. Stress on the boarder of the crazing zone is taken as the initiating point of the crazes and length to time of crazes follows exponent law. The initiation, propagation and broadening of crazes is a time-dependent process.
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