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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Indexed by:Journal Papers
Date of Publication:2015-11-01
Journal:PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
Included Journals:SCIE、EI、Scopus
Volume:229
Issue:11
Page Number:2021-2034
ISSN No.:0954-4054
Key Words:Friction stir welding; fatigue crack growth rate; fatigue life; residual stress; rotational speed
Abstract:A sequentially coupled thermo-mechanical finite element model is used to simulate the friction stir welding process. Fracture mechanical models for the middle tension specimen and the eccentrically loaded single-edge crack tension specimen are established. Utilizing the residual stress intensity factor obtained by the fracture mechanical models, the crack-closure model and superposition method are adopted to predict the fatigue crack growth rates of the two specimens. The results indicate that the effect of the residual stress on the fatigue crack growth rate becomes obvious as the stress ratio decreases. Considering the residual stress, the fatigue life of the welded plate exhibits a dramatic decrease for the middle tension specimen, but a remarkable increase for the eccentrically loaded single-edge crack tension specimen. The fatigue life of the middle tension specimen is almost insensitive to the rotational speed, but that of the eccentrically loaded single-edge crack tension specimen increases with the increase in the rotational speed.
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.
