(1. 中南大學 機電工程學院，長沙 410083；2. 桂林電子科技大學 教學實踐部，桂林 541004)
摘 要: 采用非線性有限元軟件MSC.Marc，結合淬火和預拉伸實驗，建立厚板淬火−預拉伸應力預測模型時，運X射線衍射技術的層削測試方法驗證了此模型。結果表明：應力場預測模型計算結果與實驗測算吻合較好，其中淬火應力平均偏差小于10%；有效的實驗測試可以對有限元預測模型的建立進行改進和檢驗；理想假設的存在使得預測結果與實際有所偏離，但應力預測趨勢仍可有效揭示厚板的應力演變規(guī)律。
關鍵字: 應力仿真；淬火；預拉伸；應力測量
aluminum alloy thick plate
（1.School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China;
2. Practice and Experiment Station, Guilin University of Electronic Technology, Guilin 541004, China）
Abstract:The stress prediction model was set up using the software of MSC. Marc, and combining quenching and prestretching experiments. This model was confirmed by X-ray diffractometry and layer removal methods. The experimental results are compared with predicted results. The prediction results of stresses match with experimental results, and the average difference of quenching stress is less than 10%. The effective experimental methods can improve and validate the FEM of stress prediction. The hypotheses in FEM make the results to deviate with the experiment data, but the prediction trend can effectively reveal the evolvement law of stress in thick plate.
Key words: stress simulation; quenching; prestretching; stress measurement
