In this study, a combination of experiments and finite element analyses was conducted to investigate the effect of initial imperfections on the axial compression of the 7A04-T6 aluminum alloy columns. Prior to the loading tests, measurement of the initial geometric imperfections for the columns were performed by optical theodolite and vernier calipert. The failure modes of 10 extruded circular columns were investigated. Meanwhile, the ultimate strengths, deflections and surface strains in whole process under axial compression were recorded. The finite element (FE) models of the tested columns were developed using the non-linear finite element analysis (FEA) software ABAQUS, and the imperfections and material nonlinearities were considered in the FE models. The validation of the FE models was performed against the test results; it was observed that the proposed FE models are sufficiently accurate to predict the ultimate strengths and buckling behaviors of the tested columns.

在这项研究中，结合实验和有限元分析来研究初始缺陷对7A04-T6铝合金柱轴向压缩的影响。在加载测试之前，通过光学经纬仪和游标卡尺来测量色谱柱的初始几何缺陷。研究了10根挤压圆形圆柱的破坏模式。同时，记录了轴向压缩下全过程的极限强度，挠度和表面应变。使用非线性有限元分析（FEA）软件ABAQUS开发了被测柱的有限元（FE）模型，并在FE模型中考虑了缺陷和材料非线性。有限元模型的验证是针对测试结果进行的；