Effect of residual stress on fracture properties of thin films under bending
The aim of this paper was to address the effect of residual stress on the fracture properties of brittle films on relatively soft substrate. Multiple film cracking due to the combination of the residual stresses and the applied bending stress was analyzed. First, an analytical model was developed to derive the closed-form solutions for the stress distribution and redistribution due to the edge effects in the film segment. Second, the energy and strength criteria were adopted to carry out the analysis on the multiple film cracking on the basis of the knowledge on the residual stress redistribution. Third, the case of Yttria-stabilized zirconia fihn/Inconel 617 substrate system was used to illustrate the implementation of this model. The predicted crack density against the applied strain was compared with the existing experimental measurements. The relationship between the fracture energy and the film strength was obtained.
Residual stress Film Cracking Fracture properties
Xiancheng Zhang Fu-Zhen Xuan Zhengdong Wang Shan-Tung Tu
Key Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
国际会议
2011 International Symposium on Structural Integrity 2011国际结构完整性学术研讨会--核工程结构完整性技术 ISSI 2011
合肥
英文
351-359
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）