摘要
对3种不同厚度的T700碳纤维复合材料多向层合板在2种应力比及3种应力等级下进行三点弯曲试验,对其三点弯曲静态与疲劳性能进行分析。采用不同方式对破坏后形貌进行观察。结果显示:材料厚度的增加使试样弯曲强度与模量增加,复合材料多向层合板的三点弯曲疲劳寿命与材料厚度成正比关系,与试验应力比、应力等级成反比关系。试样最终的疲劳破坏程度与疲劳寿命有关,疲劳循环数越多,层合板在横向和纵向的破坏越剧烈。同时,试样厚度越大,分层现象越明显,同时存在纤维拔出现象。
In this paper,three-point bending tests of T700 carbon fiber composite multi-directional laminates with different thicknesses are carried out under two stress ratios and three stress levels,and the static and fatigue properties of three-point bending are analyzed.The morphology after damage was observed in different ways.The results show that the increase of material thickness increases the flexural strength and modulus of the specimen,and the three-point bending fatigue life of composite multi-directional laminates is proportional to the material thickness,and inversely proportional to the test stress ratio and stress level.The final fatigue failure degree of the sample is related to the fatigue life,the higher the number of fatigue cycles,the more severe the damage in the transverse and longitudinal directions of the plywood.At the same time,the greater the thickness of the sample,the more obvious the delamination phenomenon,and the phenomenon of fiber pull out.
作者
许良
肖景厚
宋万万
周松
XU Liang;XIAO Jing-hou;SONG Wan-wan;ZHOU Song(School of Mechatronics Engineering,Shenyang Aerospace University,Shenyang 110136,China;Factory 53,Shenyang Aircraft Corporation,Shenyang 110034,China)
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2024年第2期400-409,共10页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(51775355)。
关键词
复合材料
三点弯曲
弯曲疲劳
破坏形貌
疲劳性能
composite material
three point bending
bending fatigue
destroy the shape
fatigue performance
作者简介
许良(1965-),男,教授,博士.研究方向:航空材料与结构强度.E-mail:sysyxu@163.com;通信作者:周松(1987-),男,副教授,博士.研究方向:航空材料与结构强度.E-mail:zhousong23@163.com。
