利用SHPB实验装置,测试TC4钛合金在20～600℃、应变率为103～104 s-1下的流动应力和应变的关系,应用自适应遗传算法(GA)优化建立适合高速切削模拟的Johnson-Cook(JC)热粘塑性本构模型,该模型可在较高温度和较宽应变率范嗣内精确预测TC4的流动应力.以所建的Johnson-Cook模型为材料本构模型,应用大型商用有限元软件ABAQUS,并使用切屑分离准则,建立高速正交切削有限元模型.将模拟结果与高速正交车削的实验数据进行比较,证实本构模型和有限元模拟的正确性.
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