圓柱/溝槽接觸應變分析

• Main Authors: Chen-Yu Yang, 楊振宇
• Other Authors: Pai-Chen Lin
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/22363333735463568217

碩士 === 國立中正大學 === 機械工程學系暨研究所 === 101 === This paper tends to develop an equivalent experimental platform to present the complex contact behavior between the ball, screw shaft, and screw nut by a simple groove-to-roller contact model. Digital image correlation (DIC) technology is then used to measure the strain fields of the roller under different groove shapes and loading conditions. The experimental results are further verified by finite element analyses and Hertz contact theory. The results show that when the applied load is relatively large, the contact regions of the roller show significant strain concentration phenomena and present similar strain fields as the numerical results. A 2D ball screw finite element model is then developed to obtain the contact load of each roller. The numerical results are then verified by the analytical solutions from the ball screw contact model of Mei et al. The general trends of these two solutions are similar general trends but have significant deviations between them.