【摘要】 目前复合材料结构已被广泛应用于航空航天、航海、交通、能源等工程领域。一些复合材料壁板结构由于装配、功能布局和维修等原因，往往需要设置大开口，然而，对大开口复合材料壁板结构在受载时产生局部屈曲失稳问题的相关研究还比较缺乏。本文针对碳纤维增强复合材料大开口层合板在单向拉伸加载下的局部屈曲问题开展相关实验，主要采用电阻应变片电测法和数字图像相关(Digital Image Correlation, DIC)光测法，分别进行复合材料层合板开口孔边应变和离面位移的测量，以研究开口孔边的局部屈曲失稳行为。实验结果表明，大开口复合材料层合板在整体结构发生强度破坏失效前，有可能发生孔边局部屈曲失稳，且局部屈曲的产生和屈曲临界载荷的大小会受到层合板铺层方式、开口尺寸的影响。更多还原

【Abstract】 Composite material structures are widely used in fields such as aerospace, maritime vessels, transportation energy, etc. Due to assembly, functional layout, and maintenance reasons, some wall panel structures inevitably have big cutouts, which can easily lead to instability under load. Among them, there is currently a lack of relevant research on the local buckling instability of wall panels with big cutouts under tensile loading. This article conducts experimental study on the local buckling problem of carbon fiber reinforced composite laminates with big cutout under uniaxial tensile loading. For investigating the local buckling failure behavior around the cutout, the resistance strain gauge electrical measurement and DIC(Digital Image Correlation) optical measurement were mainly used to obtain the strain and the out of plane displacement around the cutout of composite laminates in the experiments, respectively. The experimental results indicate that the composite laminates with big cutout may experience local buckling instability at the edge of the opening hole before the overall structure fails due to strength failure, and the local buckling critical loads are influenced by the stacking sequences and the dimension of cutout.更多还原