Zhang Zhao

Professor   Supervisor of Doctorate Candidates   Supervisor of Master's Candidates

Main positions:Professor in Process Mechanics

Gender:Male

Alma Mater:Dalian University of Technology

Degree:Doctoral Degree

School/Department:Department of Engineering Mechanics, Dalian University of Technology

Discipline:mechanics of manufacturing process. Engineering Mechanics. Computational Mechanics

Business Address:Room 619,Integrated Laboratory building (1#)

Contact Information:+86-411-84708432 zhangz@dlut.edu.cn

E-Mail:zhangz@dlut.edu.cn


Paper Publications

Effect of viscosity on material behavior in friction stir welding process

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Indexed by:期刊论文

First Author:Zhang, Hong-wu

Correspondence Author:Zhang, HW (reprint author), Dalian Univ Technol, Dept Engn Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China.

Co-author:Zhang, Zhao,Bie, Jun,Zhou, Lei,Chen, Jin-tao

Date of Publication:2006-10-01

Journal:TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA

Included Journals:SCIE、EI、ISTIC

Volume:16

Issue:5

Page Number:1045-1052

ISSN No.:1003-6326

Key Words:rate-dependent model; constitutive relationship; radial return mapping algorithm; friction stir welding

Abstract:Temperature-dependent elastic viscoplastic material model was used for the numerical simulation of the friction stir welding process. The non-elastic response of the rate-dependent material in the large deformation problems was calculated by using the closest point algorithm. The numerical results show that the shape of the equivalent plastic strain looks like onion rings and the spacing of the rings is approximately equal to the forward movement of the tool in one rotation. The equivalent plastic strain is increased with the increase of viscosity coefficient due to the increase of friction stress in the pin-plate interface. The region which is influenced by the rotating tool is decreased with the decrease of viscosity coefficient. The radial and circumferential stresses in front of the pin are greater than the ones behind the pin. This difference can be reduced with the decrease of viscosity.

Pre One:焊接参数对搅拌摩擦焊接质量的影响

Next One:轴向载荷变化对搅拌摩擦焊接过程中材料变形和温度分布的影响

Profile

Zhang Zhao, Ph.D., Professor in Process Mechanics.

Editorial member in Coatings (IF:2.881) from 2020 to 2022.

Editorial member in Crystals (IF:2.589) from 2020 to 2022.

Younth editorial member in Journal of Central South University(IF:1.716) from 2020 to 2022.

Professor Zhang has published more than 60 SCI publications with over 1100 citations. He served as reviewers for more than 30 international journals. His main pulications can be found:

https://orcid.org/0000-0001-7181-8617

https://publons.com/researcher/1987190/zhao-zhang/

The scientific research focuses on experimental and numerical works on friction stir welding/processing/additive manufacturing, numerical modelling and simulation of additive manufacuring, topological design of phononic crystals, locomotive and high speed train design.