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
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Date of Publication:2022-10-09
Journal:机械工程学报
Affiliation of Author(s):运载工程与力学学部
Issue:4
Page Number:13-18,24
ISSN No.:0577-6686
Abstract:Based on solid mechanics and finite element method a coupled thermo-mechanical model of the friction stir welding process is established, which serves as the basis for the further investigation on the effect of the preheating time on friction stir welding. The comparison with the experimental measured temperature and experimental observed material flow shows the validity and correctness of the established model. Numerical results show that the preheating time should be limited in the range of 1.000 s-3.281 s. When the axial freedom of the welding tool is controlled by the axial pressure, too short preheating time leads to the occurrence of void defect and too long preheating time leads to severe weld flash. The effective power needed for FSW will not be significantly changed by the variation of the preheating time. With the increase of the preheating time, the maximum temperature in friction stir welding is slightly increased and then the flow stress of the weld material is decreased accordingly, which can lead to the increase of the number of the material particles rotating with the welding tool. This phenomenon means that the stirring effect of the welding tool can become more obvious with the increase of the preheating time. © 2009 Journal of Mechanical Engineering.
Note:新增回溯数据
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.
