A tensile-film-cracking model for evaluating interfacial shear strength of elastic film on ductile substrate
A tensile-film-cracking model for evaluating interfacial shear strength of elastic film on ductile substrate
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DOI：
10.1016/s0257-8972(99)00669-6
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发表时间：
2000-04-24
影响因子：
5.4
通讯作者：
Huang, JH
中科院分区：
文献类型：
--
作者：
Chen, BF;Hwang, J;Huang, JH
通过使用有限元分析（FEA）技术，进一步研究了与最初由Agrawal和Raj提出的膜开裂模型相关的应力分布。有限元分析的结果表明，界面剪应力可以近似为四分之一段的椭圆函数，而不是由一个正弦函数的全波长在原始模型中使用。因此，提出了一个修改后的模型相关的最大界面剪切应力。在TiN涂层-304不锈钢系统中验证了新模型的有效性。结果表明，通过新模型计算的界面剪切强度与基体的屈服剪切强度具有相同的数量级。(C)2000 Elsevier Science S.A. All rights reserved.
The stress distribution associated with the film cracking model originally proposed by Agrawal and Raj is further investigated through the use of the finite element analysis (FEA) technique. The result of the FEA analysis indicates that the interfacial shear stress can be approximated by a quarter segment of an elliptical function, rather than by a sine function of a full wavelength as employed in the original model. A modified model related to the maximum interfacial shear stress is thus proposed. The validity of the new model has been tested in a TiN coating-304 stainless steel system. It is demonstrated that the interfacial shear strength evaluated through the new model is of the same order of magnitude as that of the yield shear strength of the substrate. (C) 2000 Elsevier Science S.A. All rights reserved.