(浙江大學(xué)機(jī)械與能源工程學(xué)院, 杭州 310027)
摘 要: 運(yùn)用有限元軟件ABAQUS， 對7075鋁合金板材淬火過程進(jìn)行了模擬。 比例件的加工變形表明淬火模擬所得的殘余應(yīng)力是可信的。在獲得淬火殘余應(yīng)力的基礎(chǔ)上， 模擬了不同預(yù)拉伸量對毛坯的淬火殘余應(yīng)力的消除。 結(jié)果表明： 拉伸量為3%時， 毛坯產(chǎn)生2.1%~2.6%的永久變形， 殘余應(yīng)力消除量約為86%， 完全符合航空鋁合金厚板生產(chǎn)工藝的規(guī)定。
關(guān)鍵字: 預(yù)拉伸； 7075鋁合金；淬火； 殘余應(yīng)力； 變形
（ 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
