求解楔类接触问题的ANSYS方法评价

Evaluation of ANSYS FEM to solve wedge contact problem

选择合适的数值分析方法才能高效、高精度和高可靠性地求解楔类接触问题。介绍了ANSYS中点面接触分析方法和面面接触分析方法,剖析了这两种方法的基本设置及注意事项。然后,在弹性范围内用实例对比其求解楔类接触问题的精度、可靠性、效率及适用范围。分析结果表明:点面接触方法的求解精度和可靠性比面面接触算法高,在计算机硬件资源许可的条件下,建议采用前者;对于楔类接触问题的求解,点面接触方法的求解效率比面面接触方法低;这两种方法不仅适用于平面弹性楔类接触问题,也可推广到塑性和超弹性材料的三维楔类接触问题;点面接触方法在应力集中的区域,能得到较精确的结果,而面面接触方法的求解误差相对较大。

It is an important and urgent problem what numerical method is adopted to solve the problems of wedge contact with high efficiency, high precision and high reliability. Firstly, introduces node-to-surface method and surface-to-surface method and analyzes their basic settings and notices. Secondly, contrasts their precision, reliability, efficiency and scope of application with instances in the elastic range. The analysis results show that： the precision and reliability of node-to-surface method is better than that of surface-to-surface method. So under the computer hardware resources permission, node-to-surface method is proposed. The efficiency of node-to-surface method is not as good as that of surface-to-surface method. The two methods can be used to solve the problems of wedge contact not only for elastic material but also for plastic and hyper elastic materials in 2-D and 3-D. The node-to-surface method can get better precise results in the region of contact stress concentration, but the surface-to-surface method has bigger error at the same condition.