当等效应变速率较大时,变形热效应对流动应力的影响相当显著,压缩过程基本上成为绝热过程。
While the equivalent strain rate is high, this influence is of importance and the compression process can be approximately considered as an adiabatic process.
在等温恒应变速率压缩过程中,随着等效应变速率的增大,变形热效应对流动应力的影响程度增大。
During the isothermal constant strain rate compression process, the effect of deformation heating on flow stress increases with increasing equivalent strain rate.
采用刚塑性有限元法研究了多轴压缩过程中的坯料变形行为、等效应变大小、分布以及损伤值。
The billet deformation behavior, the magnitude and distribution of effective strain and damage value were investigated by rigid-plastic finite element method during multi-axial compressions.
结果表明,热压缩变形试样心部的等效应变与应变速率比设定值大40%左右,而端面值则为设定值的1/5~1/4;
The results indicate that the efficient strain and strain rate are higher by about 40% than in the center of deformed samples, but are about 1/5~1/4 of set values at the end surface;
结果表明,热压缩变形试样心部的等效应变与应变速率比设定值大40%左右,而端面值则为设定值的1/5~1/4;
The results indicate that the efficient strain and strain rate are higher by about 40% than in the center of deformed samples, but are about 1/5~1/4 of set values at the end surface;
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