Characterization of Crack Tip Mechanical Field of Inhomogeneous Materials in Welded Joints by USDFLD Subroutine

Table 2

Elastic-plastic material property with yield strength changing in the y-direction.

Yield strength distribution	Group	Mismatch coefficient My	Yield strength gradient in transition zone Gy (MPa/mm)	Yield strength of base metal σBM (MPa)	Yield strength of weld metal σWM (MPa)
y-direction	Sandwich structure model	1	—	400	400
		0.5	—	533	267
		0.2	—	640	160
	USDFLD subroutine model	—	0	400	400
		—	133	533	267
		—	240	64	160