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
Hits:
Indexed by:期刊论文
Date of Publication:2007-09-01
Journal:SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
Included Journals:SCIE、Scopus
Volume:12
Issue:5
Page Number:436-448
ISSN No.:1362-1718
Key Words:friction stir welding; finite element method; preheating time; material flow pattern
Abstract:The effect of preheating time on friction stir welding ( FSW) is analysed in the current work by using a fully coupled thermomechanical model. Results indicate that the preheating time is very important for a successful FSW. Insufficient temperature rise and insufficient plastic deformation lead to the failure of FSW when the preheating time is very short. But excessive preheating time leads to the tool penetration in FSW. The rotating time of the material particles under the shoulder becomes longer when the preheating time is increased. Moreover, some of the material particles at the retreating side can enter into the advancing side when the preheating time is longer but this is not obvious when the preheating time is shorter. Based on this fact, it can be concluded that the decrease in the preheating time can lead to the decrease in the stirring effect of the welding tool, which may be the reason for the formation of the weld flaw when the preheating time is very short.
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.
