全受压和局部边缘受压下有裂纹薄板屈曲的试验和数值研究

受压下薄钢板经常发生屈曲失效,尤其当薄钢板存在一些如开口和裂纹等缺陷时。这种失效模式先于强度失效。给出了轴压下有裂纹板的屈曲荷载的试验结果和数值结果。为此,采用1200A铝合金制作成矩形板,且板的中心有斜裂缝。在试验和数值研究中,分析了裂缝的长度和方向、板的厚度和长宽比的影响。对两种不同的支撑形式和荷载条件(如:局部边缘荷载和支撑)的影响进行研究。最后,将试验结果与数值结果进行对比。

Experimental and Numerical Studies on Buckling of Cracked Thin-Plates Under Full and Partial Compression Edge Loading

Buckling failure is a common occurrence in thin plates under compression loading,in particular when there are some imperfections such as openings and cracks.This form of failure can often precede strength failure.In this paper,experimental and numerical studies on the critical buckling load of cracked plates subjected to axial compression is carried out.For this purpose,the rectangular plates made by 1200A aluminum alloy with central inclined crack are considered.The effects of crack length and orientation,thickness of plates and plate aspect ratio are investigated experimentally and numerically.Effects of boundary conditions and loadings are also studied by considering different types of supports and loading such as partial edge acting forces and supports.Finally,the results of experiments are compared with the results of numerical methods.