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采用有限变形理论,基于ANSYS软件二次开发了二维有限变形热弹塑性有限元模拟系统,该系统可对轴对称和平面应变条件下的金属热成形过程坯料与模具的温度场(考虎热传导、辐射、对流和塑性功转化为热)、应力场、应变场(包括弹性与塑性应变、热应变)、金属的成形过程以及模具的受力及失效原因等进行详细的热力耦合模拟分析与优化设计。通过与圆柱体镦粗和温反挤的试验结果比较,验证了该系统的可靠性,为保证成形件质量、选择成形设备、制定合理的成形工艺、改善模具受力和提高模具寿命提供可靠依据。
Based on finite deformation theory and finite element analysis (ANSYS) software, a two-dimensional finite element finite element simulation system for finite deformation thermal elasto-plastic deformation was developed. The system simulates the temperature field of the blank and the mold under the condition of axial symmetry and plane strain , Radiation, convection and plastic work into heat), stress field, strain field (including elastic and plastic strain, thermal strain), the metal forming process and the die force and failure causes detailed thermal coupling simulation analysis and optimization design. The reliability of the system was verified by comparison with the experimental results of cylinder upsetting and temperature reversal, which provided a reliable basis for ensuring the quality of the forming parts, selecting the forming equipment, formulating the reasonable forming process, improving the force of the mold and improving the service life of the mold .