【摘要】 利用MTS材料试验机和分离式Hopkinson压杆(SHPB)实验装置对经过1100℃固溶处理后的0Cr18Ni9不锈钢的静态力学性能和动态力学性能进行了测量,用Johnson-Cook模型拟合了材料的本构关系,用正交切削实验识别了Johnson-Cook模型材料参数。将SHPB实验和切削实验两种方法得到的Johnson-Cook材料模型应用于切削力的预测,分析了不同实验方法得到的材料模型在切削力的预测中的适用性,为不锈钢切削研究中的分析模型和数值计算中的材料流动应力模型选择提供参考。更多还原

【Abstract】 The static and dynamic mechanical properties of stainless steel 0Cr18Ni9,with solution heat treatment under temperature 1100℃,were analyzed herein,through experiments with material testing system(MTS)and split Hopkinson pressure bar(SHPB)apparatus.On the basis of the above work,the constitutive relations of the material were built using Johnson-Cook constitutive model.In addition,the material parameters of the model were observed by using the orthogonal experimental design.The two sets of the material parameters obtained from SHPB and cutting test were applied to predict cutting force under various machining conditions,and their applicability was compared.The comparison results provide the reference for the analysis model in stainless steel cutting research as well as the selection of material flow stress model during numerical computation.更多还原