CAJ | 학술논문

花键冷敲成形归结于材料的动态塑性变形过程，为了研究该过程材料动态响应特性，对三种常用冲击载荷下材料本构模型进行理论解析，并根据花键冷敲成形工艺参数对JC本构模型进行修正改进；通过三种本构模型在不同应变率和温度条件下的应力情况，使用流动应力预测值和实验值之差来评估模型误差值。最终结合成形过程物理机制、工艺参数和误差对比，结果表明：在大范围应变率和温度条件下，各本构模型均有其在一定范围内的适用性和精度，但对于花键成形应变率和温度范围内， PTW模型的误差率最小，能够较好预测金属流动应力。
화건랭고성형귀결우재료적동태소성변형과정，위료연구해과정재료동태향응특성，대삼충상용충격재하하재료본구모형진행이론해석，병근거화건랭고성형공예삼수대JC본구모형진행수정개진；통과삼충본구모형재불동응변솔화온도조건하적응력정황，사용류동응력예측치화실험치지차래평고모형오차치。최종결합성형과정물리궤제、공예삼수화오차대비，결과표명：재대범위응변솔화온도조건하，각본구모형균유기재일정범위내적괄용성화정도，단대우화건성형응변솔화온도범위내， PTW모형적오차솔최소，능구교호예측금속류동응력。
The process of spline cold rolling attributes to the dynamic plastic deformation of materials. In order to study the dynamic response characteristics of material,three constitutive model under impact load were analyzed, and the JC constitutive model was amended based on the parameters of spline cold rolling. The error value was e-valuated by using the difference of the predicted flow stress and experimental values of material under different strain rate and temperature conditions. Ultimately,by combining the physical mechanisms,parameters of forming and error contrast,the results show that each constitutive model has its applicability and accuracy within a certain range in the large range of strain rate and temperature conditions,however,the PTW model has the minimum error in the range of strain rate and temperature of spline cold rolling,and the flow stress is predicted to be better.