期刊论文

Influence of Shot Peening Method on the Distribution Rule of Surface Residual Stress for the Irregular Component

中文

表面技术

1001-3660

2018

47

12

99-104

10.16490/j.cnki.issn.1001-3660.2018.12.014

国家自然科学基金项目(51575117) 国家自然科学基金(民航联合基金)(61179051) 湖南省教育厅项目(15C1183)。

本校为第一机构

目的优化喷丸强化工艺,提升喷丸工艺的强化效果。方法采用预定义场和基于移动矢量的快速建模方法,实现满足表面全覆盖和不同喷丸方法的有限元模拟。通过对模拟结果中的应力值进行局部坐标转换,分析不同喷丸方法条件下残余应力沿受喷构件表面切线方向的分布规律。结果在喷射方向固定的喷丸方法中(方法-1),弹丸撞击角度在不同区域内的变化范围为60°~90°,且随弹丸撞击角度的增加,弹丸撞击时的动能消耗率和应变能转变率分别由71.6%和5.3%提高到89.0%和7.5%,表面覆盖率也随之增加。在喷射角度固定的喷丸方法中(方法-2),弹丸撞击角度始终为90°,表面覆盖率分布均匀,从而使得在凸圆弧面、斜面和凹圆弧...

The work aims to optimize the shot peening process and further improve the strengthening effect of shot peening. The finite element modelling in conformity with full surface coverage and different shot peening methods was established by the predefined field and the rapid modeling method based on moving vector. The distribution rule of residual stress along with the tangential direction of the peened component surface by different shot peening methods was analyzed through the local coordinate conversion of stress in the simulation results. As fo...