FEM modeling of in-plane stress distribution in thick brittle coatings/films on ductile substrates subjected to tensile stress to determine interfacial strength
文献类型：期刊论文
| 作者 | Wang, Kaishi1; Zhang, Fangzhou2; Bordia, Rajendra K.3 |
| 刊名 | Materials
 |
| 出版日期 | 2018 |
| 卷号 | 11期号:4 |
| DOI | 10.3390/ma11040497 |
| 英文摘要 | The ceramic-metal interface is present in various material structures and devices that are vulnerable to failures, like cracking, which are typically due to their incompatible properties, e.g., thermal expansion mismatch. In failure of these multilayer systems, interfacial shear strength is a good measure of the robustness of interfaces, especially for planar films. There is a widely-used shear lag model and method by Agrawal and Raj to analyse and measure the interfacial shear strength of thin brittle film on ductile substrates. The use of this classical model for a type of polymer derived ceramic coatings (thickness ~18 μm) on steel substrate leads to high values of interfacial shear strength. Here, we present finite element simulations for such a coating system when it is subjected to in-plane tension. Results show that the in-plane stresses in the coating are non-uniform, i.e., varying across the thickness of the film. Therefore, they do not meet one of the basic assumptions of the classical model: uniform in-plane stress. Furthermore, effects of three significant parameters, film thickness, crack spacing, and Young's modulus, on the in-plane stress distribution have also been investigated. 'Thickness-averaged In-plane Stress' (TIS), a new failure criterion, is proposed for estimating the interfacial shear strength, which leads to a more realistic estimation of the tensile strength and interfacial shear strength of thick brittle films/coatings on ductile substrates. © 2018 by the authors. |
| 出版者 | MDPI AG, Postfach, Basel, CH-4005, Switzerland |
| 源URL | [http://ir.sic.ac.cn/handle/331005/25324]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 作者单位 | 1.Aerospace Research Institute of Materials and Processing Technology, Beijing; 100076, China; 2.Research Center for Composite Materials, School of Materials Science and Engineering, Shanghai University, Shanghai; 200072, China; 3.Department of Materials Science and Engineering, Clemson University, Clemson; SC; 29634, United States |
| 推荐引用方式 GB/T 7714 | Wang, Kaishi,Zhang, Fangzhou,Bordia, Rajendra K.. FEM modeling of in-plane stress distribution in thick brittle coatings/films on ductile substrates subjected to tensile stress to determine interfacial strength[J]. Materials,2018,11(4). |
| APA | Wang, Kaishi,Zhang, Fangzhou,&Bordia, Rajendra K..(2018).FEM modeling of in-plane stress distribution in thick brittle coatings/films on ductile substrates subjected to tensile stress to determine interfacial strength.Materials,11(4). |
| MLA | Wang, Kaishi,et al."FEM modeling of in-plane stress distribution in thick brittle coatings/films on ductile substrates subjected to tensile stress to determine interfacial strength".Materials 11.4(2018). |
入库方式： OAI收割
来源：上海硅酸盐研究所
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