摘要
Abstract
This paper takes composite T-shaped stiffened panels as the research object,and completes the multi-point impact damage intro-duction at different positions(center of the stiffener,edge of the stiffener)through the impact test,and examines the impact damage morpholo-gy through the visual damage detection and non-destructive testing techniques;after that,it completes the axial compression test of impacted specimens and intact specimens(the reference group),and combines with the electro-metry method to examine the compression failure process of impacted and intact specimens,and analyzes the compression failure modes.The results show that:(1)Group B is different from Group A,the impact damage is more complex,including layer fracture damage,and the impact damage in both Group A and Group B tends to expand in the direction of the stiffener,which significantly affects the supporting effect of each stiffener on the skin.(2)The impact damage in Group B is more obvious than that in Group A.The depth of pit and the delamination area are 2.32 and 2.38 times of Group A,respectively.(3)Group B caused the compression failure of the structure due to the eccentric compression caused by the local buckling on the impact side of the flange edge of each stiffener,but Group A caused the compression failure due to the skin compression failure after each stiffener reached the load-bearing limit.关键词
复合材料加筋壁板/冲击损伤/压缩强度/压缩失效Key words
Composite stiffened plates/Impact damage/Compression strength/Compression failure分类
信息技术与安全科学
