[1] Zhang Qingdong, Ni Changjiang, Jing Tao, Wu Junjiao, et al. 3D numerical simulation of high pressure squeezing processwith revised Drucker-Prager/Cap model [J]. Journal of Southeast University (English Edition), 2017, 33 (4): 473-477. [doi:10.3969/j.issn.1003-7985.2017.04.013]

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3D numerical simulation of high pressure squeezing processwith revised Drucker-Prager/Cap model()

基于修正Drucker-Prager/Cap模型的高压压实过程三维数值模拟

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

33

Issue:

2017 4

Page:

473-477

Research Field:

Materials Sciences and Engineering

Publishing date:

2017-12-30

Info

Title:

3D numerical simulation of high pressure squeezing processwith revised Drucker-Prager/Cap model

基于修正Drucker-Prager/Cap模型的高压压实过程三维数值模拟

Author(s):

Zhang Qingdong¹;  Ni Changjiang¹;  Jing Tao¹;  Wu Junjiao¹;  Makino Hiroyasu²

¹ School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
² Sintokogio Ltd, Nagoya 450-6424, Japan

张庆东¹;  倪长江¹;  荆涛¹;  吴浚郊¹;  牧野泰育²

¹清华大学材料学院, 北京 100084; ²新东工业株式会社, 名古屋 450-6424

Keywords:

green sand;  aeration sand filling-high pressure squeeze molding;  revised Drucker-Prager/Cap model;  numerical simulation

湿黏土砂;  低压射砂-高压压实造型;  修正的Drucker-Prager/Cap模型;  数值模拟

PACS:

TG221

DOI:

10.3969/j.issn.1003-7985.2017.04.013

Abstract:

In order to investigate the sand mold strength after the aeration sand filling-high pressure squeeze molding process, a three-dimentional(3D)numerical simulation was introduced. The commercial finite element method(FEM)software ABAQUS combined with a revised Drucker-Prager/Cap model was used to simulate the squeeze compaction process. Additionally, the sand bulk density after the aeration sand filling process was tested by a specially designed experiment, which divided the whole sand bulk in the molding chamber into 5×9 regions and it was used as the input to simulate the squeeze process. During the simulation process, the uniform modeling simulation and the partition modeling simulation methods were used and the 3D numerical simulation results were compared with correlative benchmark testings. From the 3D numerical simulation results, it can be concluded that the uniform sand bulk density distribution can obtain a high quality sand mold and the revised Drucker-Prager/Cap model is suitable for handling the situation with the complex pattern. The 3D numerical simulation results can predict well the sand mold strength distribution and can be used as guidelines for the production practice.

为了研究低压射砂-高压压实造型后的砂型强度, 引入三维数值模拟方法.应用商业化有限元软件ABAQUS并结合修正的Drucker-Prager/Cap模型对高压压实过程进行了模拟.同时, 基于特殊设计的实验, 将砂箱分成5×9的区域后分别测量了射砂后造型室内型砂的堆积密度, 并将其作为压实模拟过程的输入参数.在模拟过程中, 分别使用均一密度和分区建模2种方法, 并将三维数值模拟结果和相关联标定实验做了对比.三维数值模拟结果表明:均匀的型砂密度可得到高质量的砂型, 而修正的Drucker-Prager/Cap模型更适合处理采用复杂模具的情况.三维数值模拟结果能够较好地预测砂型强度分布, 同时对实际生产有一定的指导作用.

References:

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Memo

Memo:

Biographies: Zhang Qingdong(1990—), male, graduate; Jing Tao(corresponding author), male, doctor, professor, jingtao@tsinghua.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.51575304), the National Science and Technology Major Project of the Ministry of Science and Technology of China(No.2012ZX04012011).
Citation: Zhang Qingdong, Ni Changjiang, Jing Tao, et al. 3D numerical simulation of high pressure squeezing process with revised Drucker-Prager/Cap model[J].Journal of Southeast University(English Edition), 2017, 33(4):473-477.DOI:10.3969/j.issn.1003-7985.2017.04.013.

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