摘要
为得到粘接界面的力学行为和破坏模式,对HTPB推进剂/衬层粘接试件进行了单向拉伸宏观观察试验,获得不同拉伸阶段的变形图片,记录了界面破坏的全过程;使用界面元模型表征推进剂/衬层界面,数值模拟了粘接界面试件在单向拉伸作用下的脱粘过程。结果表明:界面拉伸变形破坏过程表现为裂纹的起裂、扩展和失效;粘接试件的拉伸应力-应变曲线表现出明显的非线性特征;数值计算结果与试验得到的应力-应变曲线及试件宏观变形失效形态一致。
In order to obtain the mechanical behavior and failure mode of interface,the uniaxial tension experiments are conducted on HTPB propellant /liner adhesive specimen. The deformation images of various stages are achieved,and the debonding process is observed macroscopically. A cohesive element model is adopted to simulate propellant /liner interface. The results show that the failure mode experiences damage initiation,damage evolution and debonding,and the stress-strain response of adhesive specimen has a distinct nonlinear characteristic. The simulated results of stress-strain response and deformation are consistent with the data obtained from experiment.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2014年第10期1619-1624,共6页
Acta Armamentarii
关键词
兵器科学与技术
粘接试件
脱粘
界面元
ordnance science and technology
adhesive specimen
debonding
cohesive element
