论文期刊

‘Tail’ phenomenon and fatigue crack propagation of PC/ABS alloy




作者: Qin-Zhi Fang, T.J. Wang, Hui-Min Li.
发表/完成日期: 2007-11-16
期刊名称: Polymer Degradation and Stability
期卷:
相关文章: Tail’ phenomenon and fatigue crack propagation of PC-ABS alloy.pdf   
论文简介
The fatigue crack propagation (FCP) behavior of the alloy of polycarbonate (PC) and acrylonitrileebutadieneestyrene (PC/ABS) is experimentally
investigated in this paper. An improved compliance method is employed to measure the fatigue crack length and optical and scanning
electron microscopes (SEM) are used to observe the features of crack tip deformation in situ. ‘Tail’ phenomenon has been observed at the initial
stage of fatigue for each specimen, which is regarded as a reflection of the transition process of accumulation of damage and plastic deformation
during FCP. The law of FCP from low to high crack growth rate (106e103 mm/cycle) is obtained and described with Paris law. Porous or
dimple features govern the fatigue crack surfaces and coarse features have been seen on the crack surfaces with higher crack growth rate, while
smooth features have been observed on the crack surfaces with lower crack growth rate. A stretched band appears when the crack growth transforms
from lower to higher region of FCP rate.