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In-process Control of Distribution of Weld Residual Stress and Improvement of Structural Soundness

焊接残余应力分布的过程控制和结构牢固性的改善

基本信息

批准号：
23760096
负责人：
OKANO Shigetaka
金额：
$ 2.25万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (B)
财政年份：
2011
资助国家：
日本
起止时间：
2011 至 2012
项目状态：
已结题

项目摘要

In-process control welding with a trailing heat-sink for reducing welding-induced residual stress was developed. The effect of cooling conditions on the reduction of residual stress was investigated by numerical simulation. After that, the reduction of residual stress was verified quantitatively by measurement experiment. Furthermore, appropriate seal welding conditions for controlling weld residual stress at the remaining crack tip regionwas theoretically and analytically derived. In addition, using the fracture mechanics parameter, the usefulness of control of weld residual stress distribution for improving the structural soundness at repair weld was clarified.

为了降低焊接残余应力，提出了一种随焊热沉在线控制焊接方法。通过数值模拟研究了冷却条件对降低残余应力的影响。然后通过测量实验对残余应力的降低进行了定量验证。并从理论上和解析上推导出了控制残余裂纹尖端焊接残余应力的封焊工艺条件。此外，还阐明了利用断裂力学参数控制焊接残余应力分布对提高补焊时结构完好性的作用。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Effect of Seal Welding Conditions on Residual Stress Field and FractureMechanics Parameter around Remaining Crack

密封焊条件对残余裂纹周围残余应力场和断裂力学参数的影响

DOI：
发表时间：
2013
期刊：
Proceedings of the 2013 ASME Pressure Vessels and Piping Conference, American Society of Mechanics Engineers, PVP2013-98069(2013).
影响因子：
0
作者：
M. Mochizuki;S. Okanoa n d K. Torigata
通讯作者：
S. Okanoa n d K. Torigata

M i t i g a t i o n o f Welding-induced Tensile Residual Stress at Surface of Heavy Section Plate by In-Process Control Welding with Trailing-Heat Sink

尾随热沉过程控制焊接减轻厚截面板表面焊接残余拉应力

DOI：
发表时间：
2013
期刊：
Proceedings of the 2013 ASME Pressure Vessels and Piping Conference, American Society of Mechanics Engineers, PVP2013-98071(2013).
影响因子：
0
作者：
丹治和也;宮崎祐介;穴田賢二;立矢宏;放生明廣;石塚直宏;S. Okanoa n d M. Mochizuki
通讯作者：
S. Okanoa n d M. Mochizuki

Visualization of Machining and Welding Residual Stress Variation by Numerical Simulation in Austenitic Stainless Steel

奥氏体不锈钢加工和焊接残余应力变化的数值模拟可视化