This paper investigates the applicability of a new constitutive model with acoustoplasticity (CMA) to characterise the material deformation at ultra-high strain rates. It shows that this constitutive model enables the predictions of the material softening effect under high frequency impacts. Both the finite element analysis incorporating the CMA and experimental validations have been conducted with a specifically designed ultrasonic vibrator that can generate high frequency impacts. The study concludes that the CMA can reliably capture the material deformation responses to ultra-high strain rates and that it is applicable to problems when acoustoplasticity becomes important.

本文研究了具有声塑性 (CMA) 的新本构模型在超高应变率下表征材料变形的适用性。它表明，该本构模型能够预测高频冲击下的材料软化效应。结合 CMA 的有限元分析和实验验证都是使用专门设计的超声波振动器进行的，该振动器可以产生高频冲击。该研究得出的结论是，CMA 可以可靠地捕获材料对超高应变率的变形响应，并且它适用于声塑性变得重要时的问题。