论文期刊

Overload effect on the fatigue crack propagation of PC/ABS……




作者: Qin-Zhi Fanga, T.J. Wang
发表/完成日期: 2007-10-19
期刊名称: Polymer
期卷: Volume 48, Issue 22
相关文章:
论文简介
The effect of single overload within an otherwise constant amplitude loading

sequence on the fatigue crack propagation (FCP) behavior of the alloy of

polycarbonate and acrylonitrile–butadiene–styrene (PC/ABS) is experimentally

investigated in this paper. An improved compliance method is employed to measure the

fatigue crack length of the specimen. Optical and scanning electron microscopes are

used to observe the features of crack surface and the process of crack tip

deformation. The overload waveform has slight effect, while the overload ratio has

great effect on the crack growth retardation. A small crack increment is produced

during overloading. The crack growth rate reduces quickly, and then increases

gradually until it reaches the steady crack growth rate level when the loading

recovers to normal constant amplitude fatigue loads. Porous or dimple features

govern the fatigue crack surfaces.