Proceedings of the
9th International Conference of Asian Society for Precision Engineering and Nanotechnology (ASPEN2022)
15 – 18 November 2022, Singapore

Effect Analysis of the Resolution of Non-Ideal Surface Models for Mechanical Contact Simulations

Akimasa Otsuka1,a and Fusaomi Nagata1

1 Department of Mechanical Engineering, Sanyo-Onoda City University, 1-1-1 Daigaku-Dori., Sanyo-Onoda, Yamaguchi, 756-0884, Japan


CAD and CAE are indispensable tools for the design and development of mechanical products. Especially in the field of tolerance analysis, researchers have studied a model with unevenness actively since around 2010. These studies are mainly divided into research on how to create unevenness models and research on how to apply unevenness models. The model is defined as a non-ideal model in ISO 17450 and represents the models by a set of points or mesh called skin model shapes. When applying the non-ideal model to an actual product, the resolution of the surface models affects the calculation time and accuracy. For example, to obtain highly accurate results in contact analysis, it is necessary to rotate small changes in posture for each step. The repetition numbers in loops in the calculation program increase and calculation time also proportionally increase if the number of the points of the surfaces is large. Therefore, the suitable resolution of the surface models should be set. In this study, several resolution conditions for the non-ideal model are prepared to compare the calculation results. The Monte-Carlo simulations of contact analysis are performed using the non-ideal model pair of each resolution condition. The Monte-Carlo simulations are performed 100 times for each resolution condition, such as the square of 21, 42, 63, 84, and 105, to investigate the distribution of rotation angles.

Keywords: Non-ideal model, Contact surface, Simulation, Resolution, Tolerance analysis

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