| 基于热力耦合模型的切削加工残余应力的模拟及试验研究 |
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| 引用本文： | 孙雅洲,刘海涛,卢泽生.基于热力耦合模型的切削加工残余应力的模拟及试验研究[J].机械工程学报,2011,47(1). |
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| 作者姓名： | 孙雅洲 刘海涛 卢泽生 |
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| 作者单位： | 哈尔滨工业大学机电工程学院,哈尔滨,150001 |
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| 摘 要： | 航空精密薄壁零件具有复杂的型腔结构,切削加工残余应力是薄壁零件精度稳定性的重要影响因素,因此必须对切削加工残余应力进行研究。根据热—弹塑性有限元理论,建立切削加工三维有限元模型,对航空铝合金材料Al2A12进行切削加工非线性弹塑性有限元模拟分析,对切削加工表面残余应力进行预测和计算。通过有限元分析,得到不同切削参数、刀具参数条件下的已加工表面残余应力的模拟结果,并对结果进行比较分析,得到各个因素对工件已加工表面残余应力的基本影响规律;进行不同加工工序条件下的切削加工残余应力的有限元模拟,在加工表面已有一次切削加工残余应力分布的情况下,进行二次切削加工有限元模拟,得到二次切削加工对工件已加工表面残余应力的影响规律;并且进行不同切削参数对残余应力影响的试验研究,验证有限元模型的正确性。
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| 关 键 词： | 残余应力 有限元模拟 热力耦合模型 切削试验 |
Finite Element Simulation and Experimental Research of Residual Stresses in the Cutting Based on the Coupled Thermo-mechanical Model |
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| SUN Yazhou,LIU Haitao,LU Zesheng.Finite Element Simulation and Experimental Research of Residual Stresses in the Cutting Based on the Coupled Thermo-mechanical Model[J].Chinese Journal of Mechanical Engineering,2011,47(1). |
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| Authors: | SUN Yazhou LIU Haitao LU Zesheng |
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| Affiliation: | SUN Yazhou LIU Haitao LU Zesheng(School of Mechatronics Engineering,Harbin Institute of Technology,Harbin 150001) |
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| Abstract: | Aviation precision thin-walled parts have complex internal structures;and cutting induced residual stresses are important influencing factors for their precision stability.So,it is necessary to research on residual stresses in cutting.According to the thermal-elastic-plastic finite element theory,a 3D finite element model is established,the aviation material aluminum alloy Al2A12 is analyzed in a nonlinear elastic-plastic finite element simulation of orthogonal cutting,and residual stresses on the machined ... |
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| Keywords: | Residual stress Finite element simulation Coupled thermo-mechanical model Cutting experiment |
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