A single‐camera special stereo‐DIC (SS‐DIC) is proposed for accurate virtual fields method (VFM) identification. The single‐camera SS‐DIC allows accurate surface 3D deformation measurements using a single colour camera and a specially designed colour separation device. It not only effectively eliminates the unavoidable out‐of‐plane movement/rotation due to unideal in‐plane loading but also delivers uniformly distributed measurement points that brings great simplicity and convenience for internal virtual work calculation in VFM. In addition, since only a single camera is used for stereovision, the proposed SS‐DIC system requires no complicated synchronisation devices. The effectiveness and practicality of the proposed method are evaluated by heterogeneous deformation experiments of a holed aluminium alloy and 304 stainless steel plate. Combined with a high‐speed colour camera, the proposed method is expected to be a simple and practical method for the calibration of material constitutive model under intermediate and high strain rate conditions using VFM.

中文翻译：

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单相机特殊立体数字图像相关技术可用于准确的虚拟场方法识别

提出了一种单摄像头专用立体声DIC（SS-DIC），用于精确的虚拟场方法（VFM）识别。单相机SS‐DIC可以使用一台彩色相机和专门设计的分色设备进行精确的表面3D变形测量。它不仅有效消除了由于不理想的平面载荷而不可避免的平面外移动/旋转，而且还提供了均匀分布的测量点，为VFM中的内部虚拟工作计算带来了极大的简便性。此外，由于仅将单个摄像机用于立体视觉，所以建议的SS-DIC系统不需要复杂的同步设备。通过多孔铝合金和304不锈钢板的异质变形实验，评价了该方法的有效性和实用性。