When we draw the stress - strain relation of monotonic tension and pure torsion at the same co - ordinate namely equivalent effective stress and equivalent effective strain co - ordinate , it is obviously that the equivalent effective stress - strain curve of monotonic tension and pure torsion are basicly superposition while the equivalent effective strain is smaller . but equivalent effective stress level of monotonic tension was higher a little than that of pure torsion 把a3钢试件单一拉伸和纯扭转时应力应变关系绘于同一个坐标中即等效应力和等效应变坐标中，可以看出当等效应变较小时拉伸实验得到的等效应力应变曲线与纯扭转实验得到的等效应力应变曲线基本重合。但单一拉伸较纯扭转得到的等效应力要略高一些。
In those experiments wave shapers have been utilized to modify the incident wave so that the condition of constant strain rate is satisfied more sufficiently . the effect of outer factors on the stress equilibrium of early stage in the specimen was analyzed , and the methods to improve the uniformity of stress in specimen at early stage were given . the elastic wave velocity of specimens can be determined by the wave shape fitting of the predicted transmitted wave with the measured transmitted wave at the early stage , furthermore , the shifting - time in shpb data processing can be determined 在shpb实验中采用波形整形技术使入射波的上升沿变宽；分析了影响shpb实验中试件早期应力平衡的外部因素，给出了改善早期应力均匀性的方法；采用透射波的早期预估波形与实测波形作对比的方法确定了shpb实验数据处理中的延迟时间；因而在实验中得到了比较准确的应力应变曲线。
