A Generalized Model for Residual Stress Caused by Thermal Mismatch in Multilayer Structures
An analytical model based on multilayer structure with thermal expansion mismatch caused by temperature gradients was established to predict the residual stress in the system. The solution obtained from the model is independent of the number of layers. Three simplified models: bi-layer structure, coating system and film system with great compatibility are developed considering different engineering application. And the bilayer structure is verified by Stoneys equation under the same conditions. Tri-layer coating system ZrO2/Al2O3/1Cr18Ni9Ti is established in order to research the effect of temperature variations on the residual stress between different layers. The results suggested the stress has obvious mutation in coating interface with different temperature variation. And the residual stress with different temperature variation in different layers is larger than that with identical temperature variation.
BAI Yumei XU Yingqiang ZHANG Tao
School of Mechanical Engineering,Northwestern Polytechnica1 University,Xi’an 710072,China
国际会议
桂林
英文
1-6
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）