基于数字图像方法的加筋板屈曲失效路径试验研究  

Experimental study on the buckling failure process of stiffened panel based on 3D-DIC method

作　　者：杨弋 孔祥韶[1,2] 袁天[1] 吴卫国[1,2] YANG Yi;KONG Xiangshao;YUAN Tian;WU Weiguo(School of Transportation,Wuhan University of Technology,Wuhan 430063,China;Engineering Research Center on Green&Smart River-sea-going Ship,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学交通学院,湖北武汉430063 [2]武汉理工大学绿色智能江海直达船舶与邮轮游艇研究中心,湖北武汉430063

出　　处：《中国舰船研究》2020年第5期132-140,共9页Chinese Journal of Ship Research

基　　金：装备预先研究教育部联合基金青年人才项目资助(6141A02033108);国家自然科学基金资助项目(51509196)。

摘　　要：[目的]为记录和分析轴向受压加筋板的实际屈曲失效历程,开展基于三维数字图像相关(3D-DIC)方法的加筋板轴向受压屈曲失效路径试验研究。[方法]建立测量轴向受压加筋板的三维变形场方法,通过用有限元分析软件ABAQUS进行数值仿真计算,确定几种不同尺寸加筋板试件并开展加载试验,使用3D-DIC方法测量轴压加筋板屈曲失效全场位移和应变信息,获取轴压加筋板的屈曲失效路径。[结果]试验结果表明:在初始压缩阶段,加筋板局部各跨出现了屈曲鼓包,且数目会随着载荷的增加而逐步增多;在后屈曲阶段,加筋板承载能力逐渐降低而离面位移持续增大,板格的屈曲波形发展合并为最终的位移分布;加筋板最终的失效模式表现为板的整体屈曲失效和加强筋的扭转屈曲失效。[结论]采用3D-DIC方法试验研究轴向受压下加筋板的屈曲失效路径,所得结果可为加筋板稳定性数值计算方法的研究提供可靠的验证信息。[Objectives]In this paper,in order to record and analyze the buckling failure path of stiffened panels during the loading process,a method for measuring the three-dimensional deformation field stiffened panel was established.[Methods]By means of the numerical simulations through finite element analysis software ABAQUS,several different sizes of stiffened panels was determined,and the loading tests were carried out.The full-field displacement and strain information were measured by 3D digital image correlation(3D-DIC)measurement system,which obtained buckling failure process of stiffened panels.[Results]The results show that the buckling bulges appear in each bay of the stiffened panel in the initial compression stage,and the number of buckling bulges gradually increases as the load increases.In the post-buckling stage,the loading capacity of the stiffened panel decreases but the out-of-plane displacement continues to increase,and the buckling waves gradually develop into the final displacement distributions.The collapse modes of the stiffened panel are the overall buckling of the plating and the tripping of the stiffeners.[Conclusions]The 3D-DIC measurement system is adopted to measure the whole displacement and strain fields of the specimens in the test and obtain the buckling failure path,which provides reliable information for the study into the theory and numerical calculation methods of the stability of stiffened panels.

关 键 词：加筋板 屈曲失效路径 极限强度 模型试验 3D-DIC 

分 类 号：U661.43[交通运输工程—船舶及航道工程]