Zhang Zhao
Professor Supervisor of Doctorate Candidates Supervisor of Master's Candidates
Academic Titles: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#)
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Date:2019-10-15
Indexed by:Journal Article
Date of Publication:2015-09-07
Journal:塑性工程学报
Included Journals:CSCD、ISTIC、PKU、Scopus
Volume:22
Issue:4
Page Number:172-177
ISSN:1007-2012
Key Words:搅拌摩擦焊;热力耦合模型;蒙特卡洛方法;晶粒生长
Abstract:搅拌摩擦焊接焊后材料微观晶粒结构对构件焊后的力学性能有重要影响.在搅拌摩擦焊接数值模拟的基础上,采用蒙特卡洛模拟方法研究了焊后构件截面晶粒尺寸的分布规律.结果表明,在搅拌区域,母材受搅拌针作用后破碎细化的致密晶粒为初始生长形貌;在热力影响区,材料受到轴肩旋转拉伸的作用,跟踪材料的物质点可得到拉伸比例,并作用于母材晶粒,得到该区域初始晶粒的形貌;热影响区的晶粒变化表现为母材晶粒在温度场作用下的生长.蒙特卡洛迭代步数由材料边界扩展速度推导确定,其受材料经历的温度历程影响.研究结果与文献中晶粒尺寸的分布规律相符,验证了模型用于预测搅拌摩擦焊接晶粒生长的可行性.
