考虑形状因素的有限元模拟中橡胶压缩性对钢增强弹性轴承压缩刚度的影响,Polymer Engineering and Science

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考虑形状因素的有限元模拟中橡胶压缩性对钢增强弹性轴承压缩刚度的影响
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2022-11-01 , DOI: 10.1002/pen.26182
Ana Skender ₁ , Domagoj Damjanović ₁ , Marko Bartolac ₁ , Ivan Duvnjak ₁

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在受压钢筋弹性轴承 (SREB) 的有限元分析中，需要特别注意将橡胶建模为几乎或完全不可压缩的材料。在这项研究中，对受压的圆形弹性体垫和矩形 SREB 进行了有限元模拟，以分析橡胶可压缩性对不同垫几何形状和形状因子值的影响。可压缩橡胶的压缩模量与不可压缩橡胶的压缩模量之比也基于先前导出的精确解以及临时近似值引入。该比率准确地表示了压缩性对相对压缩性 ( K / G)压缩刚度的影响) 和形状因子值。还将数值结果与具有适度形状因子的矩形 SREB 的实验结果进行了比较。炭黑填充橡胶的相对压缩率建议值在 50-200 范围内会导致压缩刚度被低估，特别是对于形状系数值大于 5 的轴承。考虑到形状因素，建议调整相对压缩率，使压缩刚度与不可压缩情况相比下降不超过 50%。

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Influence of rubber compressibility on the compressive stiffness of steel-reinforced elastomeric bearings in finite element simulations considering the shape factor

In finite element analysis of steel-reinforced elastomeric bearings (SREB) under compression, modeling of rubber as a nearly or fully incompressible material requires special attention. In this study, finite element simulations of circular elastomeric pads and rectangular SREB under compression were performed to analyze the effects of rubber compressibility with respect to different pad geometries and shape factor values. The ratio of the compressive modulus for a compressible rubber to that of an incompressible rubber was also introduced based on the previously derived exact solutions as well as the ad hoc approximations. This ratio accurately represents the influence of compressibility on compressive stiffness in terms of relative compressibility (K/G) and shape factor values. Numerical results were also compared with the experimental results on rectangular SREB with moderate shape factors. Recommended values for relative compressibility of carbon black-filled rubbers in the range of 50–200 result in underestimated compressive stiffness, especially for bearings with shape factor values greater than five. It is recommended to adjust the relative compressibility, considering the shape factor, so that the compressive stiffness does not decrease by more than 50% compared to the incompressible case.

更新日期：2022-11-01

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