Abstract
This thesis aims to discuss the interlaminar stress distribution of a bi-layer cantilever beam caused by ambient temperature change. The effects of temperature change and thickness of layers on the fatigue life of the structure are also studied. The simulation and analysis of this study have been conducted by using ANSYS. The results show that interlaminar stresses are mainly concentrated at the free edge. The interlaminar stresses increase as the temperature increases, and the size of the stress concentration region decreases as the reduction of the thickness of both layers. However, if only the thickness of one layer changes, the size only changes slightly. The simultaneous change of the thickness of both layers will not affect the magnitude of interlaminar stresses, but the thickness change of one layer only will do so. The material properties of the layers used in this study are aluminum alloy 6061-T6 and single-crystal silicon. It is concluded that if the thickness of both layers are the same, for the fatigue life of more than 〖10〗^5 cycles, temperature change must be less than 93.4℃ ; for the fatigue life of more than 〖10〗^6 cycles, temperature change must be less than 74.9℃ .