摘要
对玻/碳混杂纤维复合材料加筋板进行了研究,借助有限元软件ABAQUS对加筋板的屈曲载荷和极限承载能力进行了计算,讨论了筋条截面形式、筋条数量、筋条尺寸对复合材料加筋板屈曲载荷的影响,研究了后屈曲阶段结构的载荷-位移曲线以及损伤失效模式。结果表明:工字形加筋方式优于J形和T形加筋方式。相同的加筋方式下,玻/碳夹芯混杂纤维复合材料加筋板的抗屈曲能力优于层间混杂复合材料加筋板抗屈曲能力。三种加筋方式下,结构的屈曲载荷均随着筋条数量的增加而提高,且筋条数目为3时提升效率最大;筋条高度为10 mm时对结构抗屈曲能力的提高效率最高,上缘条宽度和下缘条宽度对屈曲载荷的影响较小。此外,后屈曲失效模式主要为基体的拉伸损伤失效和纤维的压缩损伤失效,损伤的区域和趋势主要与纤维铺设角度和铺设顺序有关。
The glass/carbon hybrid fiber composite reinforced panel was studied.The buckling load and ultimate bearing capacity of the stiffened plates are calculated by the finite element software ABAQUS,and the effects of re inforcement section form,number of reinforcements and size of reinforcements on the buckling load of the composite stiffened plates are discussed,and the load-displacement curves of the structure and the damage failure modes during post-buckling arestudied.The results show that the I-shaped reinforcement method is better than the J-shaped and T-shaped reinforcement methods.The buckling resistance of the glass/carbon fiber sandwich composite reinforced panel is better than that of the interlayer hybrid composite reinforced panel under the same reinforcement method.The buckling load of the structure increases with increasing the number of reinforcement bars in all three reinforce ment methods,and the lifting efficiency is the highest when the number of reinforcement bars is 3;the height of 10 mm has the highest efficiency for the buckling resistance of the structure,while the width of the upper edge and the width of the lower edge have less influence on the buckling load.In addition,the failure modes of post-buckling are mainly of tensile damage failure of the matrix and compressive damage failure of fibers,and the damage area and trend are mainly related to the laying angle and laying sequenc of fibers.
作者
孙双双
王修刚
王强强
SUN Shuangshuang;WANG Xiugang;WANG Qiangqiang(College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)
出处
《复合材料科学与工程》
北大核心
2024年第11期22-33,共12页
Composites Science and Engineering
基金
山东省自然科学基金(ZR2014AL011)。
关键词
玻/碳混杂纤维复合材料
加筋板
屈曲
后屈曲
渐近损伤
glass/carbon hybrid fiber composite
stiffened plate
buckling
post-buckling
progressive damage
