Study on modeling and calculation of the residual stress on welding process was performed in the Tee junction of the piping system. The welding material standard with the specification of
heat conductivity of k = 13,5x106 WI "K.m2 and thermal expansion of a = 13x10-6
mmlmm was used as a calculation model. The residual stress was calculated by
iteration of the strain which was obtained from the temperature distribution during the
cooling process on the welding to the room temperature with temperature simulation
of 1200"C at the welded area. The calculation was done by the finite element method
using the 3 dimension modeling of ANSYS 5.4. program. The stress distribution
showed the residual stress on the welded area was 300 to 400 MPa, while at the
material of piping was 30 to 170 MPa. The stress concentration could be observed at
the welded junction which was occurred in the inner and surface junction, with the
maximum stress of 440 MPa. Based on the calculation result, it can be concluded that
the computation method can predict the average and the maximum of residual stress
from the stress concentration. Keywords: residual stress, welding, Tee junction, finite element B. Bandriyana Pusat Teknologi Bahan Industri Nuklir- BATAN
heat conductivity of k = 13,5x106 WI "K.m2 and thermal expansion of a = 13x10-6
mmlmm was used as a calculation model. The residual stress was calculated by
iteration of the strain which was obtained from the temperature distribution during the
cooling process on the welding to the room temperature with temperature simulation
of 1200"C at the welded area. The calculation was done by the finite element method
using the 3 dimension modeling of ANSYS 5.4. program. The stress distribution
showed the residual stress on the welded area was 300 to 400 MPa, while at the
material of piping was 30 to 170 MPa. The stress concentration could be observed at
the welded junction which was occurred in the inner and surface junction, with the
maximum stress of 440 MPa. Based on the calculation result, it can be concluded that
the computation method can predict the average and the maximum of residual stress
from the stress concentration. Keywords: residual stress, welding, Tee junction, finite element B. Bandriyana Pusat Teknologi Bahan Industri Nuklir- BATAN
