The structural response of metal sheets under various in-plane loads are investigated in this article using a combined experimental and numerical approach. For this purpose, four different specimen shapes, made from 2 mm thin sheets of aluminum (AL1100) and mild steel (IS 1570), are tested at different loading angles, e.g., pure shear (0°), pure tension (90°) and mixed mode (30°, 60°) in the Arcan fixture. Both the full field displacement and full field strain profiles of the gauge section are investigated using the stereo imaging (3D DIC). The possibility of achieving the ultimate shear strength in the specimen or the plastic buckling (out-of-plane deformation) of the specimen during the in-plane shear test is explored at the beginning. In the absence of out-of-plane deformation, the material behavior is studied at different loading angles, while the other sets of experiments are focused towards understanding the structural behavior of thin metal sheets. The experimental observations are also compared with the finite element simulation and excellent similarity is observed.

本文采用实验和数值方法相结合的方法研究了金属板在各种平面载荷下的结构响应。为此，以2 mm的薄铝片（AL1100）和低碳钢（IS 1570）制成的四种不同样品形状在不同的加载角度下进行了测试，例如，纯剪切力（0°），纯张力（90°）和Arcan灯具中的混合模式（30°，60°）。使用立体成像（3D DIC）研究了规范截面的全场位移和全场应变曲线。在试样或塑性屈曲中达到极限剪切强度的可能性刚开始时在平面内剪切试验中研究了试样的（平面外变形）。在没有平面外变形的情况下，研究了在不同加载角度下的材料行为，而其他实验则集中于理解薄金属板的结构行为。实验结果也与有限元模拟进行了比较，并观察到了极好的相似性。