Analytical modelling of residual stresses in machining
Analytical modelling of residual stresses in machining
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DOI：
10.1016/j.jmatprotec.2006.09.032
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发表时间：
2007-03-05
影响因子：
6.3
通讯作者：
Lazoglu, I.
中科院分区：
文献类型：
--
作者：
Ulutan, D.;Alaca, B. Erdem;Lazoglu, I.
开发了一个分析模型来预测加工中的残余应力。在残余应力的热机械模型中，工件的热场和机械切削力是耦合的。基于热力学第一定律，考虑了主剪切区产生的剪切能、前刀面-切屑接触区产生的摩擦能、切屑、刀具和工件之间的热平衡。采用有限差分法求解工件、刀具和切屑上的温度分布。计算出的工件温度场用于热负荷计算。使用分析弹塑性模型和松弛程序计算热载荷和机械载荷产生的应力。该模型通过文献中轴承钢 100Cr6 (JIS SUJ2) 残余应力的实验测量得到验证。利用此处提出的分析模型，残余应力预测的计算时间显着减少。 (c) 2006 Elsevier B.V. 保留所有权利。
An analytical model is developed for prediction of residual stresses in machining. In the thermo-mechanical model of residual stresses both the thermal field of the workpiece and mechanical cutting forces are coupled. The shear energy created in the primary shear zone, the friction energy produced at the rake face-chip contact zone, the heat balance between the chip, tool and workpiece are considered based on the first law of thermodynamics. The temperature distributions on the workpiece, tool and chip are solved by using finite difference method. The calculated workpiece temperature field is used in thermal load calculations. Stresses resulting from thermal and mechanical loading are computed using an analytical elasto-plastic model and a relaxation procedure. The model is verified with experimental measurements of residual stresses on bearing steel 100Cr6 (JIS SUJ2) in the literature. With the analytical model presented here, substantial reduction in computational time is achieved in the predictions of residual stresses. (c) 2006 Elsevier B.V. All rights reserved.