弯曲铝合金方管的轴压性能试验研究

Experimental Study on Axial Compression Performance of Bent Aluminum Alloy Square Tube

摘要:

为研究带初弯曲度铝合金方管的轴压承载力，完成了8个试件的轴压稳定性试验，并建立了与试验条件一致的有限元模型。通过对比试验和有限元分析结果验证了有限元模型的可靠性。结果表明，带有较大初弯曲度铝合金方管的破坏模式为整体弯曲失稳。最后，根据有限元分析结果拟合得到较大初弯曲度铝合金方管的整体稳定系数计算式，并将拟合计算式结果和数值分析结果及试验结果进行对比，验证了计算式的正确性。

关键词:弯曲铝合金方管;轴压承载力;初始缺陷

Abstract:

In order to study the axial compression capacity of the aluminum alloy square tube with initial bending， the axial compression stability test of 8 specimens was completed， and a finite element model with the same test conditions was established. The reliability of the finite element model was verified by comparing the results of experiments and finite element analysis. The results show that the failure mode of the aluminum alloy square tube with large initial bending is the overall bending instability. Finally， according to the finite element analysis results， the calculation formula of the overall stability coefficient of the aluminum alloy square tube with large initial bending was obtained， and by comparing results of the fitting calculation formula with the numerical analysis results and the test results， the correctness of the calculation formula was verified.

Key words:bent aluminum alloy square tube;axial compression capacity;initial defects