Theoretical tensile model and cracking performance analysis of laminated rubber bearings under tensile loading
Theoretical tensile model and cracking performance analysis of laminated rubber bearings under tensile loading
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板式橡胶支座拉伸理论拉伸模型及开裂性能分析
DOI：
10.12989/sem.2014.52.1.075
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发表时间：
2014-10
影响因子：
2.2
通讯作者：
Yan, Weiming
中科院分区：
文献类型：
--
作者：
Chen, Shicai;Wang, Tongya;Yan, Weiming
为了分析叠层橡胶支座在拉伸荷载作用下的拉伸性能，基于弹性力学理论，提出了一种分析叠层橡胶支座拉伸性能的理论模型。应用边界约束条件和橡胶材料不可压缩的假设（根据已有的研究结果，橡胶材料的泊松比约为0.5），推导了受拉橡胶层的应力和变形表达式。在此基础上，分析了橡胶层自由边变形区的应力分布和变形规律，并通过数值计算进行了验证，同时应用断裂能理论分析了预测断裂能密度和梯度方向的分布。研究了橡胶层裂纹萌生和裂纹扩展方向的预测。分析结果表明，
和变形表达式可以模拟弹性范围内叠层橡胶支座橡胶层的应力分布和变形规律，根据试验现象，采用裂纹能量法预测叠层橡胶支座的破坏机理是可行的。
To analyze the tension performance of laminated rubber bearings under tensile loading, a theoretical tension model for analyzing the rubber bearings is proposed based on the theory of elasticity. Applying the boundary restraint condition and the assumption of incompressibility of the rubber (Poisson\'s ratio of the rubber material is about 0.5 according the existing research results), the stress and deformation expressions for the tensile rubber layer are derived. Based on the derived expressions, the stress distribution and deformation pattern especially for the deformation shapers of the free edges of the rubber layer are analyzed and validated with the numerical results, and the theory of cracking energy is applied to analyze the distributions of prediction cracking energy density and gradient direction. The prediction of crack initiation and crack propagation direction of the rubber layers is investigated. The analysis results show that the stress
and deformation expressions can be used to simulate the stress distribution and deformation pattern of the rubber layer for laminated rubber bearings in the elastic range, and the crack energy method of predicting failure mechanism are feasible according to the experimental phenomenon.
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