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A fast correction for half-space theory applied to contact modeling of bodies with curved free surfaces
Tribology International ( IF 6.2 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.triboint.2020.106292
Ali Yalpanian , Raynald Guilbault

Abstract This study proposes a simple method for simulating contacts with curved edges. It develops a fast correction approach to eliminate the errors introduced on curved free surfaces by the half-space assumption in semi-analytical methods. The complete procedure first defines a counterbalance radius to eliminate the shear stress generated on free surfaces, and then introduces a correction factor for the counterbalance load to account for the normal stresses generated on free surfaces. A comparison with FEA results shows a 92% improvement after applying the shear correction and a greater-than-96% improvement after applying the complete correction (shear and normal stresses). Computational costs are also significantly lower than those required by FEA, and are at least 9 times so for the studied cases.

中文翻译:

半空间理论的快速修正应用于自由曲面物体的接触建模

摘要 本研究提出了一种简单的方法来模拟具有弯曲边缘的接触。它开发了一种快速校正方法,以消除半解析方法中半空间假设在弯曲自由表面上引入的误差。完整的程序首先定义平衡半径以消除自由表面上产生的剪切应力,然后引入平衡载荷的校正因子以解释自由表面上产生的法向应力。与 FEA 结果的比较表明,应用剪切校正后提高了 92%,应用完全校正(剪切和法向应力)后提高了 96% 以上。计算成本也明显低于 FEA 要求的成本,至少是研究案例的 9 倍。
更新日期:2020-07-01
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