| 摘要(英) |
This study applies explicit method in finite element software for quasi-static simulations to assess the ductile fracture of materials and the maximum torque of hinge components, aiming to reduce the design time and mold trial costs of hinge components. The ductile fracture settings for materials in the simulation are based on uniaxial tensile experiments conducted on 17-4PH metal powder injection molded specimens to obtain material information. Transformation of material stress strain curve from engineering to true one and tensile simulations are performed using the ABAQUS finite element software. The simulation result of stress-strain curves are highly consistent to experimental ones with a maximum stress error rate ranging from 0.01% to 0.13% and a plastic fracture strain error rate ranging from 0.05% to 1.56%, confirming the correctness of the ductile fracture settings for the material.
In the hinge torque experiments, the core shaft is made of 10B21 material, and the hinge support frame is made of SK7T1 material. Both materials undergo uniaxial tensile tests, and material curve transformation and ductile fracture settings are performed within the software, along with torque simulations. From the comparison of the simulation and experimental results, it is found that the maximum torque values have an error rate of 10% for the core shaft, with the fracture location in simulation matching the experimental results. For the hinge support frame, the maximum torque value has an error rate of 2.5%, and it is observed in the software that there is significant concentration of tensile stress at the actual fracture location.
The consistency between the experimental and simulation results demonstrates that using the explicit method for quasi-static fracture simulation can help predict the behavior of objects under loading and maximum torque value of hinges. This method can help reduce hinge design time while avoiding convergence issues associated with implicit methods due to high nonlinearity. |
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