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:期刊论文
Date of Publication:2009-04-15
Journal:机械工程学报
Included Journals:EI、PKU、ISTIC、CSCD、Scopus
Volume:45
Issue:4
Page Number:13-18,24
ISSN No.:0577-6686
Key Words:搅拌摩擦焊接;有限元法;热力耦合分析;预热时间
Abstract:基于固体力学的有限元方法建立搅拌摩擦焊接过程的热力耦合分析模型,并以此为基础,研究预热时间对搅拌摩擦焊接过程的影响,与试验测量的温度和试验观测到的材料流动现象的对比证明了该模型的有效性和正确性.数值模拟结果显示预热时间需要控制在1.000～3.281 s之间,在采用压紧力控制搅拌头轴向自由度的情况下,预热时间过短会导致孔洞缺陷的形成,而预热时间过长会导致飞边现象变得非常严重.搅拌摩擦焊接所需的有效功率不会随预热时间的变化发生明显改变.随着预热时间的延长,搅拌摩擦焊接中的最高温度略有增加,同时,焊接材料温度的升高使材料的流动应力下降,导致随搅拌头一起流动的物质点略有增加,说明搅拌头的搅拌效应随着预热时间的延长而变得明显.
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.
