Effect of strain rate-sensitivity on statistical evolution of microvoids

• 作 者: 李晖凌 黄筑平
• 机 构: (Department of Mechanics, Peking University, Beijing 100871, China),(Department of Mechanics, Peking
• 出 处: Science in China,Ser.A
• 发表日期: 1996年12期
• 关键词: nucleation explanation macroscopic tensile porosity insensitive viscous ductile

The statistical evolution of microvoids under high stress triaxiality is investigated. Based on the expression for the void growth rate in a power-law viscous matrix and the balance law of microvoids’ number, the evolution of microvoids’ number density under dynamic loading is studied. Thus, the si2E distribution functions of microvoids are found from the theoretical analysis, and the effect of strain rate-sensitivity of the matrix on the evolution of microvoids is examined. The present theoretical analysis may provide a reasonable explanation for the experimental phenomena observed by previous researchers.

The statistical evolution of microvoids under high stress triaxiality is investigated. Based on the expression for the void growth rate in a power-law viscous matrix and the balance law of microvoids ’number, the evolution of microvoids’ number density under dynamic loading is studied. The present theoretical analysis may provide a reasonable explanation for the experimental phenomena previously observed. The si2E distribution functions of microvoids are found from the theoretical analysis, and the effect of strain rate-sensitivity of the matrix on the evolution of microvoids is examined. researchers.