This paper relates to an experimental study on the compression of thin-walled composite profiles with open cross-sectional shapes and a symmetric layup. The primary objective of the study was to determine the effect of eccentric compressive load on the stability and load-carrying capacity of the analysed profiles. The study investigated the effect of laminate layup and cross-sectional shape on the buckling load, postbuckling equilibrium path and failure load of the structures under compression. The experiments were performed on samples of short columns made of CFRP by autoclaving. Real composite structures were subjected to compression until failure; test parameters were measured in order to determine post-buckling equilibrium paths for the full range of loading conditions. The initiation of composite material damage was assessed by acoustic emission. The employed research methods made it possible to examine the problems of nonlinear stability and load-carrying capacity of the compressed structures.

本文涉及对具有开放横截面形状和对称叠层的薄壁复合型材进行压缩的实验研究。该研究的主要目的是确定偏心压缩载荷对分析型材的稳定性和承载能力的影响。该研究调查了层压板铺层和横截面形状对受压结构的屈曲载荷、屈曲后平衡路径和破坏载荷的影响。通过高压灭菌对由 CFRP 制成的短柱样品进行了实验。真正的复合结构受到压缩直至失效；测试参数的测量是为了确定全范围载荷条件下的屈曲后平衡路径。通过声发射评估复合材料损坏的开始。所采用的研究方法使得研究受压结构的非线性稳定性和承载能力问题成为可能。