Research on the Mechanical Characteristics and Failure Mechanism of Prestressed Multilayer Stagger-Split Die

In this paper, the prestressed multilayer stagger-split die (PMSSD), which is a kind of high-pressure device, is studied by numerical simulation, theoretical analysis, and experiments. The force characteristics, failure mechanism, and failure mode of the belt die and PMSSD are studied. The results show that the failure of the belt die is caused by the tensile stress, while the PMSSD is caused by the von Mises stress. According to the stress characteristic, the PMSSD has higher pressure bearing capacity. The experimental results demonstrate that the PMSSD has higher pressure bearing capacity compared with the theoretical analysis. This provides a method for designing higher-pressure dies.