The fracture analysis of a graded coating/substrate system of finite thickness with arbitrary spatial variations of coating properties: Plane deformation
The fracture analysis of a graded coating/substrate system of finite thickness with arbitrary spatial variations of coating properties: Plane deformation
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DOI：
10.1016/j.engfracmech.2004.09.012
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发表时间：
2005-08
影响因子：
5.4
通讯作者：
Yuesheng Wang;Ganyun Huang;D. Gross
中科院分区：
文献类型：
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作者：
Yuesheng Wang;Ganyun Huang;D. Gross
建立了弹性性能连续变化的功能梯度材料的多层模型。该模型将女性生殖器切割分为多层。在每一层中，材料的性质呈线性变化，并且在子界面上是连续的。利用这一新的多层模型，我们解决了FGM涂层带材在面内变形下的裂纹问题。该方法采用傅里叶积分变换技术和奇异积分方程理论。计算了应力强度因子。通过与现有模型的比较，发现了新模型的一些优点：(1)它不涉及子界面处材料性质的不连续；（ii）可用于分析具有任意变化特性的fgm的裂纹问题。
A new multi-layered model for functionally graded materials (FGMs) with continuously varying elastic properties is developed. The model divides the FGM into multiple layers. In each layer the material properties vary linearly and are continuous on the sub-interfaces. With this new multi-layered model, we solve the crack problems of an FGM coated strip under the in-plane deformation. The method employs the Fourier integral transform technique and singular integral equation theory. The stress intensity factors are calculated. Comparisons between the present model and other existing models show some advantages of the new model: (i) it involves no discontinuities of the material properties at the sub-interfaces; and (ii) it can be used to analyze the crack problems of FGMs with properties of arbitrary variations.