摘要
对延性金属靶板在刚性平头弹丸正撞击下的破坏模式进行了研究。一般而言,延性金属靶板的破坏模式可以分为两种:带有总体变形的局部简单剪切破坏和局部化的绝热剪切冲塞破坏。首先基于Bai-Johnson热塑性本构关系建立了一个局部化的绝热剪切冲塞模型,然后结合描述带有总体变形的局部简单剪切破坏的Wen-Jones模型,找出了两种模型之间转化的临界条件。理论预测与文献中的实验结果吻合得很好。
This paper examines the failure modes of ductile metal plates subjected to impact by rigid flat-ended projectiles at normal incidence. General speaking, there are two failure modes which can occur in a ductile metal plate：simple shear failure with global deformation, and localized adiabatic shear plugging. Based on the thermoplastic constitutive relationship of Bai and Johnson, an adiabatic shear plugging model is first proposed. When combined with the Wen-Jones model which describes simple shear failure with global response,a critical condition for the change in these two failure modes is obtained. It transpires that the present theoretical predictions are in good agreement with available experimental observations in terms of failure modes and ballistic limits.
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
2007年第2期157-164,共8页
Chinese Journal of High Pressure Physics
关键词
延性金属靶板
平头弹丸
破坏模式
简单剪切破坏
绝热剪切冲塞
弹道极限
ductile metal plate
flat-ended projectile
failure mode
simple shear failure
adiabatic shear plugging
ballistic limit
