A fracture analysis of cathodic delamination at polyurea/steel interfaces |
| |
| Affiliation: | 1. Centre for Theoretical Studies, Indian Institute of Technology Kharagpur, 721302, India;2. Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, 721302, India;1. Department of Mechanical Engineering, National Institute of Technology, Raipur, India;2. Department of Mechanical Engineering, Indian Institute of Technology, Patna, India;3. Department of Mechanical Engineering, University of Saskatchewan, Canada;1. State Key Laboratory of Polymer Material and Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, PR China;2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, PR China;1. Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, 310018, China;2. Department of Functional Machinery and Mechanics, Shinshu University, 3-15-1 Tokida, Ueda, 386-8576, Japan;3. EduScience Research Institute Co., Ltd., Higashimita 3-10-1-524, Tama Ward Kawasaki City, Kanagawa Prefecture, 214-0033, Japan;1. Lancaster University, Engineering Department, Gillow Avenue, Lancaster LA1 4YW, United Kingdom;2. Physics Department, Tobruk University, Tobruk, Libya |
| |
| Abstract: | A fracture mechanics approach to accelerated life testing of cathodic delamination between steel and polyurea is presented. This required the hyperelastic behavior of the polyurea to be described by the Marlow model based on uniaxial tension and plane strain compression tests. Time-dependence was also considered but could be neglected if proper test protocols were followed in cathodic delamination tests using a strip blister specimen. The variation of J-integral with specimen geometry and loading parameter was obtained, which allowed the resistance to cathodic delamination to be expressed in terms the J-integral and the crack speeds obtained from the tests at several temperatures. The approach established that both temperature and stress can be used to accelerate the cathodic delamination, thereby providing a quantitative and rational basis for conducting accelerated testing. In addition, the discriminating nature of the approach for design purposes was exemplified by quantitatively establishing differences in the delamination resistance of three surface treatments. |
| |
| Keywords: | Cathodic delamination Polymer/metal interfaces Accelerated testing Fracture mechanics |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
