粉末热等静压离散元-有限元耦合模拟与形变预测

doi:10.3901/JME.2025.16.083

机械工程学报 ›› 2025, Vol. 61 ›› Issue (16): 83-91.doi: 10.3901/JME.2025.16.083

• 材料科学与工程 • 上一篇

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粉末热等静压离散元-有限元耦合模拟与形变预测

郭磊¹, 田文卿¹, 陈辉², 蔡超¹, 史玉升¹

1. 华中科技大学材料成形与模具技术全国重点实验室武汉 430074；
2. 西北工业大学凝固技术全国重点实验室西安 710072

接受日期:2024-08-20 出版日期:2025-01-23 发布日期:2025-01-23
作者简介:郭磊，男，1998年出生。主要研究方向为热等静压数值模拟。E-mail：483854615@qq.com;蔡超(通信作者)，男，1989年出生，博士，副教授，博士研究生导师。主要研究方向为热等静压与增材制造。E-mail：chaocai@hust.edu.cn
基金资助:
国防基础科研资助项目(JCKY2023204C033)

Discrete Element-finite Element Coupled Simulation and Deformation Prediction Method for Powder Hot Isostatic Pressing

GUO Lei¹, TIAN Wenqing¹, CHEN Hui², CAI Chao¹, SHI Yusheng¹

1. State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074;
2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072

Accepted:2024-08-20 Online:2025-01-23 Published:2025-01-23

摘要/Abstract

摘要： 粉末热等静压(Hot isostatic pressing, HIP)过程中，不均匀的粉末初始密度分布会引起包套和零件的不均匀收缩。粉末初始相对密度信息对提高数值模拟中的零件变形预测精度至关重要。介绍一种新的粉末热等静压工艺的数值模拟方法，将离散元填粉结果中的相对密度信息原位添加至有限元模型中进行形变模拟。该方法能够在有限元模型中耦合离散元粉末相对密度信息，并提高轮廓预测的准确性。比较离散元-有限元耦合模型、单一有限元模型的轮廓预测精度，证明耦合模型预测精度更高，局部误差最多减小0.71 mm。通过改进焊接位置的几何轮廓和材料属性，可以进一步提高模拟精度。离散元-有限元耦合模型为粉末热等静压提供了一种更加准确的预测方法，并且在圆柱形包套上进行了规律性探索，有望对复杂零件的模拟提供新思路。

关键词: 热等静压, 离散元, 有限元, 模拟仿真

Abstract: During hot isostatic pressing(HIP) process, non-uniform initial relative density distribution of powder causes uneven shrinkage of the capsule and part. Information on the initial relative density of powder is crucial for improving the accuracy of part deformation prediction in numerical simulations. A new numerical simulation method for powder hot isostatic pressing is introduced, where the relative density information from discrete element filling results is added in-situ to the finite element model for deformation simulation. This method enables coupling of discrete element powder relative density in the finite element model and improves the accuracy of the contour prediction. Comparison of contour prediction accuracy between the discrete element-finite element coupling model and the single finite element model demonstrates that the coupling model has higher prediction accuracy, with local errors reduced by up to 0.71 mm. Simulation accuracy can be further improved by enhancing the geometric contour and material properties at welding positions. The discrete element-finite element coupling model provides a more accurate prediction method for powder hot isostatic pressing, and regular exploration on a cylindrical capsule is conducted, offering new insights for the simulation of complex parts.

Key words: hot isostatic pressing, discrete element method, finite element method, numerical simulation

中图分类号:

TH124

郭磊, 田文卿, 陈辉, 蔡超, 史玉升. 粉末热等静压离散元-有限元耦合模拟与形变预测[J]. 机械工程学报, 2025, 61(16): 83-91.

GUO Lei, TIAN Wenqing, CHEN Hui, CAI Chao, SHI Yusheng. Discrete Element-finite Element Coupled Simulation and Deformation Prediction Method for Powder Hot Isostatic Pressing[J]. Journal of Mechanical Engineering, 2025, 61(16): 83-91.

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粉末热等静压离散元-有限元耦合模拟与形变预测

Discrete Element-finite Element Coupled Simulation and Deformation Prediction Method for Powder Hot Isostatic Pressing

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