Numerical investigation of CTOD estimation methods for laser welds
Numerical investigation of CTOD estimation methods for laser welds
复制标题
激光焊接 CTOD 估算方法的数值研究
DOI:
10.1007/s40194-020-00904-4
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发表时间:
2020
影响因子:
2.1
通讯作者:
Minami Fumiyoshi
中科院分区:
文献类型:
--
作者:
Takashima Yasuhito;Shao Chendong;Lu Fenggui;Minami Fumiyoshi
This paper proposes an estimation method for crack tip opening displacement (CTOD) in laser welds. The theoretical model for CTOD estimation developed by Dugdale and Bilby et al. (DBCS model) was used for laser-welded plates. The yield stress of the laser weld metal and narrow hard zone width affected the CTOD, and the correction of yield stress by using the DBCS model to obtain a suitable CTOD estimation was investigated. To apply the DBCS model to CTOD estimation for laser welds, an equivalent yield stress concept was proposed. The equivalent yield stress was affected by the strength mismatch ratio and hard zone width, because the yield stress of the laser weld metal decreases with the constraint loss caused by the plastic deformation that occurred in the base metal. The predicted CTOD from the value of applied load obtained using the proposed estimation method agrees well with experimental critical CTODs for laser welds of both 780 and 520 MPa class structural steel.
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DOI:
10.1016/s1566-1369(02)80028-0
发表时间:
2002
期刊:
European Structural Integrity Society
影响因子:
--
作者:
M. Nagel;P. Langenberg;F. Lüder;W. Bleck;U. Dilthey
通讯作者:
U. Dilthey
影响因子:
0.8
作者:
F. Minami;Yasuhito Takashima;M. Ohata
通讯作者:
M. Ohata
DOI:
10.1115/pvp2009-77956
发表时间:
2009
期刊:
--
影响因子:
--
作者:
Yasuhito Takashima;M. Ohata;F. Minami
通讯作者:
F. Minami
DOI:
10.2207/qjjws.25.149
发表时间:
2007
期刊:
Quarterly Journal of The Japan Welding Society
影响因子:
--
作者:
F. Minami;M. Ohata;A. Tanizawa;Y. Hagihara;Susumu Tukamoto;T. Handa;Kohtaro Inose
通讯作者:
Kohtaro Inose
影响因子:
2.1
作者:
J. K. Kristensen
通讯作者:
J. K. Kristensen