Dynamic fracture toughness of high strength metals under impact loading： increase or decrease

• 作 者: Ze-Jian Xu Yu-Long Li
• 机 构: StateKeyLaboratoryofExplosionScienceandTechnology,SchoolofAeronautics
• 出 处: 力学学报：英文版
• 发表日期: 2011年4期
• 关键词: 动态断裂韧性 高强度钢 冲击荷载作用 30CrMnSiA 金属 动态应力强度因子 40CR钢 DFT Dynamic fracture. Fracture to
• 基金项目: The project was supported by the 111 Project （B07050） and the National Natural Science Foundation of China （10932008）.

An elusive phenomenon is observed in previous investigations on dynamic fracture that the dynamic fracture toughness(DFT) of high strength metals always increases with the loading rate on the order of TPa.m 1 /2.s 1.For the purpose of verification,variati