摘要
该文研究了玻璃纤维编织复合材料制成的可收卷层板在大变形条件下的弯曲静力性能和疲劳性能。通过弯曲静力试验得到了试验件在大变形条件下的应变和位移的关系;通过有限元模拟静力试验并与试验结果对照,确定了疲劳试验的载荷;研究了在大变形条件下不同铺层层板的弯曲疲劳寿命及失效模式和相同铺层层板的疲劳寿命曲线。结果表明:复合材料层板在大变形弯曲时具有明显的非线性行为,且(±45°)铺层层板弯曲疲劳性能明显优于(0°/90°)铺层层板;在最小应变和最大应变比不变的情况下,相同铺层层板的弯曲最大应变和对数疲劳寿命之间存在线性关系。
The bending static properties and fatigue properties of rollable laminates made of glass fiber braided composites under large deformation are studied.The relationship between strain and displacement under large deformation is obtained by bending static tests.The load of fatigue tests is determined by finite element simulation of static tests and comparing the results of finite element simulation with static tests.The bending fatigue life and failure mode of different laminates,together with fatigue life curve of the same ply composite laminates under large deformation are studied.The results show that the composite laminates have obvious nonlinear behavior in large deformation bending,and the bending fatigue performance of(±45°)laminates is better than that of(0°/90°)laminates.Besides,holding the ratio of minimum strain to maximum strain constant,there is a linear relationship between maximum strain and logarithmic fatigue life.
作者
周震
程小全
张涛
陈磊
吴永康
ZHOU Zhen;CHENG Xiao-quan;ZHANG Tao;CHEN Lei;WU Yong-kang(School of Aeronautic Science and Engineering,Beihang University,Beijing 100083,China;Shanghai Institute of Satellite Engineering,Shanghai 201109,China;Aerospace Specialty Materials and Technology Institute,Beijing 100074,China)
出处
《工程力学》
EI
CSCD
北大核心
2020年第8期213-220,229,共9页
Engineering Mechanics
关键词
复合材料层板
大变形
非线性
弯曲
疲劳
composite laminates
large deformation
nonlinearity
bending
fatigue
