中文摘要：

针对强动载作用下延性金属的层裂问题,在分析孔洞之间几何关联的基础上,定义了一个新的耦合损伤及孔洞几何信息的孔洞汇合判定方法,同时,基于能量守恒原理,解析了孔洞汇合对损伤快速增长影响的物理机理.通过分析数值计算结果和对比相关文献的实验可知：孔洞汇合后不仅引起损伤增长,而且导致了损伤材料内部微孔洞数目的减少、孔洞平均尺寸的增加。

英文摘要：

In the present study,with a view to solve the spallation of ductile metal under intense dynamic loading,we develop a new void coalescence criterion accounting for the damage and void geometry based on the geometric relationship between voids.Following the principle of energy conservation,we reveal the physical mechanism explaining the influence of void coalescence on the growth of damage.The comparison between calculated results and experiment data indicates that void coalescence leads to rapid growth of damage,reduction of void numbers,and increase of average void size.