+高级检索
应用于粉末冶金的修正Drucker-Prager/Cap模型
作者:
作者单位:

1.深圳市万泽中南研究院有限公司;2.中南大学粉末冶金研究院

作者简介:

通讯作者:

中图分类号:

TG146.1

基金项目:

广东省重点领域研发计划项目No.2019B010943001及国家科技重大专项No.2017-VI-0009-0080资助


A MODIFIED DRUCKER-PRAGER/CAP MODEL FOR POWDER METALLURGY
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    粉末冶金是金属材料成形工艺的重要环节,但现有各种模型都无法完整模拟金属粉末在压制前后期特有的力学性能。本文通过引入致密金属的屈服强度,对Drucker-Prager/Cap模型进行修改,将其屈服面限制在致密金属的Von Mises屈服面以内,并随着压制过程,使之无限接近Von Mises屈服面。通过与文献试验数据对比,证明了本文提出的修正模型具有相当高的精度。最终将该模型应用于高温合金的热等静压模拟,其变形模拟结果与实验相符,并且应力分布比传统Drucker-Prager/Cap模型的计算结果更加合理。

    Abstract:

    Powder Metallurgy is an important part of the forming process for metal materials. However, most material models are not able to simulate the variation of mechanical characters during the compressing process. In this paper, the Drucker-Prager/Cap model is modified by including the fully densified metal yield strength. This modified Drucker-Prager/Cap model can limit the yield strength of metal powder within the Von Mises surface of a fully densified metal. With the compressing process, the powder’s surface is infinitely close to Von Mises surface. By comparing of the model prediction and the published experimental results, this modified model works well in terms of accuracy. And, it is applied to the simulation of a hot isostatic pressing for a supper alloy. The prediction of the deformation as well as the stress distribution by this model is more accurate compared to the real test than that by the traditional Drucker-Prager/Cap model.

    参考文献
    相似文献
    引证文献
引用本文

王超,肖磊,张高翔,郭建政.应用于粉末冶金的修正Drucker-Prager/Cap模型[J].稀有金属材料与工程,2020,49(9):3115~3121.[Wang Chao, Xiao Lei, Zhang Gaoxiang, Guo Jianzheng. A MODIFIED DRUCKER-PRAGER/CAP MODEL FOR POWDER METALLURGY[J]. Rare Metal Materials and Engineering,2020,49(9):3115~3121.]
DOI:10.12442/j. issn.1002-185X.20190746

复制
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2019-09-12
  • 最后修改日期:2019-12-25
  • 录用日期:2020-01-03
  • 在线发布日期: 2020-10-15
  • 出版日期: