(浙江大学机械与能源工程学院, 杭州 310027)
摘 要: 运用有限元软件ABAQUS， 对7075铝合金板材淬火过程进行了模拟。 比例件的加工变形表明淬火模拟所得的残余应力是可信的。在获得淬火残余应力的基础上， 模拟了不同预拉伸量对毛坯的淬火残余应力的消除。 结果表明： 拉伸量为3%时， 毛坯产生2.1%~2.6%的永久变形， 残余应力消除量约为86%， 完全符合航空铝合金厚板生产工艺的规定。
关键字: 预拉伸； 7075铝合金；淬火； 残余应力； 变形
（ College of Mechanical and Energy Engineering,
Zhejiang University， Hangzhou 310027, China）
Abstract: A quenching process of 7075 aluminum plates was simulated by ABAQUS—a powerful FEA program. To verify the simulation result of quenching process, a reduced-scale part was machined and tested. The result between FEA and experiment was discovered accordantly. With FEA based quenched stress, different stress distributions were obtained under different conditions of pre-stretching. The research shows that the blank is pre-stretched about 3%, the magnitude of plastic strain is between 2.1%-2.6%, and the quenched-stress is removed about 86%. All these quantities agree well with the manufacturing technics of aviation aluminum alloy thick-plate.
Key words: pre-stretching; 7075 aluminum alloy; quenching; residual stress; distortion
