摘要
报导了由短脉冲激光引起的应力波加载及电炮驱动Ｍｙｌａｒ膜平面飞片碰撞ＴＣ４、ＴＣ９钛合金靶的实验及数值计算研究结果。由回收靶样品的金相分析表明：在电炮驱动飞片碰撞及由激光引起的应力波加载所造成的应变率分别在１０￣６ｓ￣（－１）左右及１０￣７ｓ￣（－１）以上两种情形下，ＴＣ４、ＴＣ９钛合金的层裂特性都是以微孔洞的成核、增长、汇合为特征的韧性断裂。运用一维流体弹塑性动力学程序进行数值研究表明：成核增长ＮＡＧ模型在一定程度上可以用来描述高应变率下ＴＣ４、ＴＣ９钛合金的损伤破坏特性。
The experimental and numerical simulation.results of dynamic failure of TC4 andTCg titanium alloys under shock loadings induced by short pulse duration laser beam and electricgun drived Mylar plane flyer impacting the specimen is reported in this paper.The detail metallur-gical analysis of recovered specimen indicates that for both loading conditions,the strain rateabout 10￣6s￣(-1) by electric gun drived flyer impacting target and the strain rate over 10￣7s￣(-1)by shortpulse duration laser beam loading,the failure and fracture of TC4 and TC9 titanium alloys are allductile in the course of microvoid nucleation,growth and coalescence.Thenumerical investigationby one dimensional code SSS shows that to some extent the nucleation and growth (NAG)damagemodel can be used to describe the faiture of TC4 and TC9 titanium alloys under high strain rates.
出处
《高压物理学报》
CAS
CSCD
北大核心
1995年第2期96-106,共11页
Chinese Journal of High Pressure Physics
基金
中国工程物理研究院科学基金及国防科工委跨行业基金
关键词
激光
应力波
高应变率
损伤断裂
钛合金
laser-induced stress waves,plane-plate impact,high strain rates,failure and frac-ture.
