Compilation and Application of UMAT for Mechanical Properties of Heterogeneous Metal Welded Joints in Nuclear Power Materials

Table 1

Material properties and mismatch coefficient of welded joints.

“Sandwich” material structure model	M	0.7	0.8	0.9	1.0	1.1	1.2	1.3
	A508	476	476	476	476	476	476	476
	Alloy52 Mb	333.6	393.0	428.4	476.0	523.6	571.2	618.8
Continuous transition material model	Y (mm)	−5 ≤y ≤ 5
	σs (y) (MPa)	14.24y + 404.8	8.3y + 434.5	4.76y + 452.2	476	−4.76y + 499.8	−8.3y + 523.6	−14.24y + 547.4
	σs (MPa)	333.6 ≤ σs ≤ 476	393 ≤σs ≤ 476	428.4 ≤ σs ≤ 476	476	523.6 ≤ σs ≤ 476	571.2 ≤ σs ≤ 476	618.8 ≤ σs ≤ 476