Relative damage stress and its application in the case of temperature cycling load

摘要

Void damage is the main failure characteristics of constrained ductile metal foil. In order to evaluate the mechanical response of ductile metal under different temperatures, the concept of equivalent damage stress proposed by Lemaitre is modified by temperature normalization. A new concept of relative damage stress is advanced, and in the light of this concept, a reasonable explanation is given to the thermal fatigue life data of solder joints under temperature cycling.