中文摘要：

基于数字图像相关法（DIC）与双目视觉技术,提出并实现了一种用于爆炸焊接制备的铜/铝复层板全场三维应变测量的方法。为了验证该方法的可行性,进行了Q235钢拉伸实验,将DIC法与引伸计变形测量结果进行了对比。应用DIC法对预应变下的复层板各向异性进行了性能检测与研究。结果表明：数字图像相关法的应变测量精度高于0.5%,与引伸计所测结果基本相当;随着预应变量的增加,复层板料力学参数的各向异性先增强后减弱;塑性应变比、应变硬化率的变化与预应变量和加载方向密切相关;板料轴向应变与宽向应变间的线性关系也受预应变与加载方向的影响。

英文摘要：

To measure the deformation of Cu/A1 clad metals made by explosive welding technique, a new full-field three-dimensional deformation measurement method was proposed and implemented based on the digital image correlation（DIC） method and binocular stereovision. To validate the feasibility of the proposed method, an extensometer was used during the Q235 steel tensile test. The anisotropy of Cu/A1 clad metals under uniaxial tension after prestrain was investigated. The results demonstrate that the accuracy of strain measurement is not lower than 0.5 %, much close to that of the extensometer. With an increase in prestrain, the anisotropy of Cu/A1 clad metals mechanical parameters increases first and decreases afterwards. The plastic strain ratio, strain hardening rate all strongly depend on loading directions and prestrains. The linear relations between longitudinal strain and transverse strain are also influenced by tensile directions and prestrains.