邢家麒,吴跟上,赵树森,贺占蜀,李延民,邵景干,余桧鑫.喷丸改善Q235B焊接接头残余应力场的数值模拟[J].表面技术,2021,50(9):70-80.
XING Jia-qi,WU Gen-shang,ZHAO Shu-sen,HE Zhan-shu,LI Yan-min,SHAO Jing-gan,YU Hui-xin.Numerical Simulation of Shot Peening for Improving Residual Stress Field of Welded Joint of Q235B[J].Surface Technology,2021,50(9):70-80 |
| 喷丸改善Q235B焊接接头残余应力场的数值模拟 |
| Numerical Simulation of Shot Peening for Improving Residual Stress Field of Welded Joint of Q235B |
| 投稿时间：2020-09-24 修订日期：2021-03-11 |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.09.006 |
| 中文关键词: Q235B 焊接 随机喷丸 残余应力 最优参数 数值模拟 |
| 英文关键词:Q235B weld random shot peening residual stress optimal parameters numerical simulation |
| 基金项目:国家自然科学基金项目(51305408);河南省交通运输重点科技计划项目(2019J2);河南省重点研发与推广专项(科技攻关)项目(202102110113) |
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| Author | Institution |
| XING Jia-qi | Henan Province Engineering Laboratory for Anti-fatigue Manufacturing Technology, School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, China |
| WU Gen-shang | School of Highway, Henan College of Transportation, Zhengzhou 450005, China |
| ZHAO Shu-sen | Henan Province Engineering Laboratory for Anti-fatigue Manufacturing Technology, School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, China |
| HE Zhan-shu | Henan Province Engineering Laboratory for Anti-fatigue Manufacturing Technology, School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, China |
| LI Yan-min | Henan Province Engineering Laboratory for Anti-fatigue Manufacturing Technology, School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, China |
| SHAO Jing-gan | School of Highway, Henan College of Transportation, Zhengzhou 450005, China |
| YU Hui-xin | Henan Province Engineering Laboratory for Anti-fatigue Manufacturing Technology, School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, China |
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| 中文摘要: |
| 目的 建立随机喷丸模型，模拟喷丸改善Q235B焊接接头残余应力场。方法 首先，建立Q235B焊接接头模型，通过间接耦合法计算焊接残余应力。然后，将残余应力作为初始条件导入焊接接头喷丸模型，研究弹丸直径d、弹丸速度v、弹丸入射角θ和弹丸质量流量rm对焊接接头残余应力场的影响规律。最后，分析喷丸后焊接接头残余应力场的改善情况。结果 焊后焊缝横向残余应力σx和纵向残余应力σz分别可达227、196 MPa，调整喷丸参数可以消除残余拉应力并引入残余压应力。本仿真范围内，d=1 mm、θ=60°、v=60 m/s、rm=9 kg/min为最优喷丸参数，此时对于σx和σz，表面残余压应力分别可达–246、–275 MPa，最大残余压应力分别为–306、–310 MPa，最大残余压应力深度分别为0.24、0.27 mm，残余压应力层深度分别为0.78、0.66 mm。结论 无论是σx，还是σz，增大d和θ，最大残余压应力深度和残余压应力层深度显著增大;增大v，最大残余压应力、最大残余压应力深度和残余压应力层深度显著增加。因此，喷丸强化能够明显改善Q235B焊接接头残余应力场。 |
| 英文摘要: |
| The work aims to simulate improvement of residual stress field of welded joint by establishing random shot peening (SP) model. Firstly, the model of Q235B welded joint was established, and the residual stress of the welded joint was calculated by indirect coupling method. Then, the residual stress was introduced into the SP model of the welded joint as the initial condition to evaluate the influence law of shot diameter d, shot velocity v, shot impact angle θ and shot mass flow rate rm on the residual stress field of the welded joint. Finally, the improvement of residual stress field of welded joint after SP was analyzed. The results show that the transverse residual stress σx and the longitudinal residual stress σz of the weld seam can reach 227 MPa and 196 MPa as welded, respectively. Adjusting SP parameters can eliminate tensile residual stress and introduce compressive residual stress. In this simulation d=1 mm、θ=60°、v=60 m/s、rm=9 kg/min are the optimal SP parameters. For σx and σz, the corresponding surface compressive residual stress can reach -246 MPa and -275 MPa, the corresponding maximum compressive residual stress are -306 MPa and -310 MPa, the corresponding depths of the maximum compressive residual stress are 0.24 mm and 0.27 mm, and the corresponding depths of the compressive residual stress layer are 0.78 mm and 0.66 mm. Whether σx or σz, the depth of the maximum compressive residual stress and the depth of the compressive residual stress layer significantly increase with the increase of d and θ,and increasing v can significantly increase the maximum compressive residual stress, the depth of the maximum compressive residual stress and the depth of the compressive residual stress layer. So SP can improve residual stress field of welded joint efficiently. |
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