Research progress of forming limit of sheet metal under nonlinear loading path
Forming limit diagram(FLD)is an important tool to evaluate the local formability of sheet metal.The study of FLD under nonlinear loading paths is of great significance to improve the rationality of process design and the formability of sheet metal in the actual production process.The research progress of domestic and foreign scholars on the forming limit of sheet metal under nonlinear loading paths was summarized and analyzed,including three aspects:test methods,theoretical prediction models and path-independent FLDs.The application scope,advantages and disadvantages of different test methods were studied emphatically,the theoretical models and appli-cation examples for predicting FLDs under various nonlinear loading paths were expounded,and the current research results on strain path-independent FLDs were summarized.Finally,the current research directions with more potential were summarized from the above three as-pects,and the development trends,difficulties and challenges in the future were prospected.
nonlinear loading pathforming limitanisotropyyield criterionconstitutive model
万方数据
维普
