With the rapid development of manufacturing technology in the fields such as aerospace, aviation, national defense, and automobiles, the demands for lightweight, toughening, and forming accuracy of products have increased. As one of the main defects in the plastic forming of thin-walled components, wrinkling failure has always been a key element in forming control. The sheet metal is restrained by the mold in actual forming process and the wrinkling is significantly affected by the boundary conditions. To study the effect of the mold constraints on the wrinkling failure in the actual forming process, a stretching wrinkling test of wedge plate with the boundary constraint conditions of mold was designed. By establishing the simulation model for wrinkling failure of sheet forming under mold constraints and its wrinkling limit diagram (WLD), the accurate prediction of sheet metal wrinkling failure form and the critical state in actual forming was realized. At the beginning of the research, the wedge plate tensile test was implemented for using as verification for simulation results, then the wrinkle simulation model of Buckle-Dynamic with the instability mode as the initial defect was established. By combining with the non-contact full-field strain measurement system DIC to obtain the strain data of the specimens in the test process, the accuracy of the simulation model was verified. On this basis, the critical wrinkling limit diagram (WLD) was established for the wrinkle partition on the wedge specimen, and the influence of stress state, stress loading path, principal compressive stress increment, principal stress ratio factors on the distribution and propagation direction of wrinkles, as well as the morphology and characteristics of WLD are discussed. The research content of this study is of guiding significance for the prediction of the actual wrinkling failure of sheet and shell forming.

随着航天，航空，国防，汽车等领域制造技术的飞速发展，对产品的轻量化，增韧和成型精度的要求日益提高。作为薄壁部件塑性成形的主要缺陷之一，起皱故障一直是成形控制中的关键因素。在实际的成型过程中，金属薄板受到模具的限制，起皱受到边界条件的显着影响。为了研究在实际成型过程中模具约束对起皱破坏的影响，设计了具有模具边界约束条件的楔形板拉伸起皱试验。通过建立模具约束下板材成形起皱失效的仿真模型及其起皱极限图（WLD），实现了钣金起皱破坏形式的准确预测和实际成形中的临界状态。在研究开始时，进行楔形板拉伸试验，以验证模拟结果，然后建立以不稳定性模式为初始缺陷的Buckle-Dynamic皱纹模拟模型。通过结合非接触式全场应变测量系统DIC获得测试过程中试样的应变数据，验证了仿真模型的准确性。在此基础上，建立了楔形试样上折皱分区的临界起皱极限图（WLD），以及应力状态，应力加载路径，主压应力增量，讨论了影响皱纹分布和传播方向的主要应力比因子，以及WLD的形态和特征。本研究的研究内容对于预测板壳成形的实际起皱破坏具有指导意义。