Stable crack growth in ductile polymers

被引：8
|
作者：
Bazhenov, S
机构：
[1] Institute of Chemical Physics, 117977 Moscow
来源：
JOURNAL OF MATERIALS SCIENCE | 1997年 / 32卷 / 03期
关键词：
PTFE; Crack Extension; Linear Elastic Fracture Mechanic; Stable Crack Growth; Initial Crack Length;
D O I：
10.1023/A:1018572726615
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Growth of a crack in ductile polymers (polyarylate, PTFE, and PU/PMMA blends) was studied. The crack growth was described assuming that local yielding in the crack tip is similar to large-scale shear yielding in rigid-plastic materials. Crack growth was stable, and a wedge shaped crack tip was formed. The crack tip opening displacement and the crack extension in the initial stage of the crack growth were proportional to the square of the strain up to 11% elongation. Dugdale's equation was modified to describe the magnitude of the crack tip opening. In PA, a yield subzone near the crack tip was observed.
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页码：797 / 802
页数：6
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