摘要
为更准确评估飞机复合材料结构的抗冲击能力,开展面内初始应力作用下的复合材料层合板冲击影响与损伤特性研究。设计一种面内拉伸/压缩初始应力施加设备,提出一种初始应力复合材料高速冲击试验方法,针对X850/IM+牌号的复合材料层合板,开展高速冲击试验。结果表明,面内初始应力对其高速冲击行为影响显著;相比无初始应力作用下的结果,面内压缩应力降低了结构抗弯刚度、横向冲击载荷和剩余速度,提高了弹道速度;而面内拉伸应力作用则反之。
In order to reveal the real impact resistance of aircraft composite structures,the impact behavior and damage of composite panels under prestressing are studied.A kind of in-plane tension and compression loading device was designed,and a kind of high-speed impact test method for prestressed composite structures was proposed.High-speed impact tests for X850/IM+composite panels were conducted.The results show that in-plane prestress has a significant influence on the impact response.Compared with non-prestressed impact result,the inplane pre-compression reduces the structural bending stiffness and relieves the lateral impact load,resulting in a decrease of the residual speed and an increase of the ballistic velocity,while the in-plane pretension on the contrary.
作者
王计真
Wang Jizhen(Aviation Key Laboratory of Science and Technology on Structures Impact Dynamics,Aircraft Strength Research Institute of China,Xi’an 710065,China)
出处
《航空科学技术》
2020年第1期81-84,共4页
Aeronautical Science & Technology
基金
航空科学基金(2016ZA23005)~~
