| SHI Chang-shuai,WANG Ao,ZHU Xiao-hua,WAN Xiao-feng,CHAI Guo-dong,LI Bo.Tensile Mechanical Behavior and Bonding Failure Mechanism of Carbon Steel-rubber Vulcanizing Bonding[J],52(4):417-426 |
| Tensile Mechanical Behavior and Bonding Failure Mechanism of Carbon Steel-rubber Vulcanizing Bonding |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.04.038 |
| KeyWord:vulcanizing bonding cohesive zone model bonding failure tensile failure rubber numerical simulation |
| Author | Institution |
| SHI Chang-shuai |
School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu , China |
| WANG Ao |
School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu , China |
| ZHU Xiao-hua |
School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu , China |
| WAN Xiao-feng |
CNPC Jichai Power Company Limited Chengdu Compressor Branch, Chengdu , China |
| CHAI Guo-dong |
School of Engineering, Southwest Petroleum University, Sichuan Nanchong , China |
| LI Bo |
School of Engineering, Southwest Petroleum University, Sichuan Nanchong , China |
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| Abstract: |
| The work aims to research the tensile mechanical behavior and bonding failure mechanism of carbon steel-rubber bonding structural parts and to obtain the effects of bonding process parameters on the quality of carbon steel-rubber bonding interfaces. The cohesive zone model was introduced to describe the bonding failure process of bonding interface. The cohesive parameters were obtained based on the experimental fitting of interfacial mechanical properties of bonding structural parts. A three-dimensional tensile numerical model of carbon steel-rubber bonding was established. The bonding failure behavior of carbon steel-rubber under tensile load was analyzed from the perspectives of tensile stress, peel stress, damage factor and stiffness weakening. The effects of stiffness, initial damage strength and fracture energy on mechanical properties of carbon steel-rubber bonding interface were studied. Under the cohesive parameters obtained from the experiment. The maximum tensile stress in the middle of carbon steel-rubber bonding interface was 0.42 MPa larger than that in the edge, and the maximum peel stress at the edge of the bonding interface was 0.77 MPa greater than the maximum tensile stress. When the tensile displacement was 1.35 mm, the middle of the bonding interface first entered damage evolution. When the tensile displacement increased to 1.8 mm, the edge of the bonding interface entered damage evolution, and the middle of the bonding interface was completely failed. The tensile strength of the bonding interface increased with the decrease of the stiffness. The tensile strength of the adhesive interface increased with the decrease of the stiffness. The smaller the stiffness, the more obvious the tensile resistance of the bonding interface. When the initial damage strength was less than 3.42 MPa, the damage evolution rate of bonding interface was obviously slow, and the bonding failure occurred under large tensile displacement. The tensile displacements of the bonding interfaces with different fracture energy were the same when the bonding interfaces entered into damage evolution, and the larger the fracture energy, the slower the damage of the bonding interface evolved to complete failure. The results show that, the larger the maximum tensile stress in the middle of carbon steel-rubber bonding interface, and the smaller the maximum peel stress. The bonding failure occurs first in the middle of the bonding interface. The carbon steel-rubber bonding interface enters the damage evolution stage, resulting in the decrease of bonding force and tensile stress. As long as the carbon steel-rubber bonding interface entered damage evolution, it will rapidly evolve to complete failure. The larger the tensile displacement, the greater the trend of rubber edge shrinkage to the middle, and the greater the elastic deformation energy. Once the bonding failure occurs, the bonding interface will quickly spread from the middle to the edge and the area where bonding failure occurs is large. Reducing the stiffness of carbon steel-rubber bonding interface, increasing initial damage strength and fracture energy can effectively prevent bonding failure. The location and range of initial bonding failure at the carbon steel-rubber bonding interface with different cohesion parameters are random, but the bonding failure spreads from the middle of the bonding interface to the edge. The results can provide a theoretical basis for the vulcanizing bonding process of carbon steel - rubber. |
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