【摘要】 针对热防护涂层的承载特征,建立了涂层、基体体系的平面应变模型.以均匀应变差比拟热膨胀失配,基于最小功原理,推导了完整涂层/基体界面应力的级数解.分析结果表明,在自由端面附近,界面应力集中明显,其峰值达到了与涂层内拉应力相当的量级.涂层膨胀或收缩,界面正应力分别呈现压应力或拉应力状态,界面剪应力也发生方向交变.更多还原

【Abstract】 A plane strain model is constructed for a thermal protective coating,in which the thermal mismatch is analogized with uniform difference in strain.The interfacial stresses are obtained in series form based on the principle of minimum work.The results indicate that there exists a distinct interfacial stresses concentration near the free end,and the maximum interfacial stresses can reach the order of tension in coating.更多还原