| 喷丸强化Ti6Al4V钛合金的数值模拟 |
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| 引用本文： | 王成,李开发,姚尚成.喷丸强化Ti6Al4V钛合金的数值模拟[J].航空动力学报,2021,36(3):449-457. |
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| 作者姓名： | 王成 李开发 姚尚成 |
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| 作者单位： | School of Mechanical Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China |
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| 基金项目： | 安徽自然科学基金（2008085QE228）； 安徽省高校自然科学研究重点项目（KJ2019A0126） |
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| 摘 要： | 为了更加真实地模拟Ti6Al4V钛合金的喷丸强化过程,建立了一个基于概率控制多弹丸冲击靶面位置的三维喷丸有限元模型,以考虑喷丸强化过程中弹丸之间的相互作用。模拟了喷丸角度为60°和90°的两种工况,结果表明:对于相同的弹丸尺寸和初始速度,达到完全喷丸覆盖率和饱和喷丸强度,60°喷丸角度工况在单位受喷面积上需要的弹丸个数为15/D2(D是弹丸直径),90°喷丸角度工况需要的弹丸个数为35/D2;在达到完全喷丸覆盖率的过程中,随着弹丸个数的增加,喷丸强化的残余压应力逐渐增大并趋于稳定,而受喷表面粗糙度基本呈线性增大;在完全喷丸覆盖率下,相对于60°喷丸角度工况,90°喷丸角度工况的表面残余压应力较小,但最大残余压应力较大,表面粗糙度也较大。
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| 关 键 词： | 喷丸强化 残余应力 表面粗糙度 喷丸覆盖率 喷丸强度 |
| 收稿时间： | 2020/8/4 0:00:00 |
Numerical simulation of shot peening of Ti6Al4V alloy |
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| WANG Cheng,LI Kaif,YAO Shangcheng.Numerical simulation of shot peening of Ti6Al4V alloy[J].Journal of Aerospace Power,2021,36(3):449-457. |
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| Authors: | WANG Cheng LI Kaif YAO Shangcheng |
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| Affiliation: | School of Mechanical Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China |
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| Abstract: | To simulate the shot peening of Ti6Al4V alloy more factually, a three dimensional finite element model of shot peening based on the probability control multiple shot impact positions was developed for taking into account the interaction between shots in the process of shot peening. Two simulations of the shot peening with the impact angles of 60° and 90° were carried out respectively. The results showed that, with respect to the same shot size and initial velocity, for reaching the full shot peening coverage and saturated shot peening intensity in the two shot peening cases of the impact angles of 60° and 90°, the shot numbers per unit shot-peened area of 15/D2 and 35/D2 were required, (wherein D was the shot diameter). During the process of reaching the full shot peening coverage, with the increase of shot number, the compressive residual stresses induced by shot peening increased and tended to be saturated, but the surface roughness increased linearly. Under the full shot peening coverage, compared with the shot peening case of the impact angle of 60°, the smaller surface compressive residual stress was obtained, while the larger maximum compressive residual stress and the larger surface roughness were obtained by the shot peening with the impact angle of 90°. |
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| Keywords: | shot peening residual stress surface roughness shot peening coverage shot peening intensity |
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