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Journal Home Online First Current Issue Archive For Authors Journal Information 中文版

2012, Volume 6, Issue 3

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Frontiers of Structural and Civil Engineering >> 2012, Volume 6, Issue 3 doi: 10.1007/s11709-012-0169-3

Influence of welding residual stresses on the ductile crack growth resistance of circumferentially cracked pipe

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1. Norwegian University of Science and Technology, N-7491 Trondheim, Norway; 2. SINTEF Materials and Chemistry, N-7465 Trondheim, Norway

Available online:2012-09-05

Abstract

Welding residual stress is one of the main concerns for fabrication and operation of steel structures due to its potential effect on structural integrity. This paper focuses on the effect of welding residual stress on the ductile crack growth resistance of circumferentially cracked steel pipes. Two-dimensional axi-symmetry model has been used to simulate the pipe. Residual stresses were introduced into the model by using so-called eigenstrain method. The complete Gurson model has been employed to calculate the ductile crack growth resistance. Results show that residual stresses reduce the ductile crack growth resistance. However, the effect of residual stresses on ductile crack growth resistance decreases with the increase of crack growth. The effect of residual stress has also been investigated for cases with different initial void volume fraction, material hardening and crack sizes.

Keywords

residual stress ; ductile crack growth resistance ; complete Gurson model ; eigenstrain method

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京公网安备 11010502051620号 京ICP备11030251号-2