Research Initiation: Experimental and Analytical Studies inFatigue Crack Initiation

本研究的目的是从理论和实验两方面研究疲劳载荷作用下高分子材料的裂纹萌生和损伤演化过程。通过对疲劳试样切片的显微观察，可以确定损伤演化的机理。损伤增长的动力学将在分析研究中建模。研究结果将为损伤演化和疲劳裂纹萌生提供一种预测形式。另外，这些结果可以用于开发更可靠的技术来预测结构部件在疲劳载荷下的寿命。

The objective of this research is to study theoretically and experimentally, crack initiation and damage evolution in polymeric materials under fatigue loading. The mechanism of damage evolution will be determined by microscopic observation of the sectioned fatigue specimens. The kinetics of damage growth will be modelled in the analytical study. The results will lead to a predictive formalism for damage evolution and fatigue crack initiation. Alternatively, the results can be used to develop more reliable techniques for predicting the life time of a structural component subjected to fatigue loading.