Research Initiation: Experimental and Analytical Studies inFatigue Crack Initiation

本研究的目的是从理论和实验上研究聚合物材料在疲劳载荷作用下的裂纹萌生和损伤演化。损伤演化机制将通过对疲劳断口的微观观察来确定。损伤增长的动力学将在分析研究中建立模型。研究结果将给出损伤演化和疲劳裂纹萌生的预测公式。或者，这些结果可以用来开发更可靠的技术来预测承受疲劳载荷的结构部件的寿命。

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.