Fem Modifying the Resistance Curve of Weld Metal Solidification Crack Measured by Trans-Varestraint Test
DONG Zhibo; WEI Yanhong; LIU Renpei
State Key Laboratory of Advanced Welding Technology Production; Harbin Institute of Technology; Harbin 150001
Cite this article:
DONG Zhibo; WEI Yanhong; LIU Renpei. Fem Modifying the Resistance Curve of Weld Metal Solidification Crack Measured by Trans-Varestraint Test. Acta Metall Sin, 2005, 41(7): 780-784 .
Abstract The Trans--Varestraint test was modeled with finite element
method (FEM) and the local strains in the trail of weld
molten pool were obtained with different bending strains.
The results show that there is a strain concentration in the
train of weld molten pool during Trans--Varestraint testing
and the calculated local strains thus modify the
tested average strains, that is the material resistance
to weld solidification cracks. Moreover, the calculated local
strains agree well with the measured local strains got
with the combination of high speed CCD camera and the Trans--Varestraint
test. Furthermore, the driving force to the solidification
crack of the stainless steel SUS310 was calculated and
compared with the modified resistance so that
the weld solidification crack was predicted, which agrees
well with the experimental results.
The results indicate that the weld solidification crack
can be predicted with
combination of Trans--Varestraint test and FEM.
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