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Abstract:
The finite element analysis model of a welded tubular K-joint is
built firstly. The stress distribution along the weld toe for
tubular K-joints is calculated. Thereafter, the effect of some main
geometrical parameters on the stress distribution along the weld for
tubular K-joints under balanced axial loads is investigated through
the parametric study on 420 K-joint models. Through the numerical analysis on these models, it is found that the stress distribution along the weld toe for tubular K-joints under balanced axial loads is determined by some geometrical parameters. The position of the hot spot stress shifts between the crown and the saddle when some geometrical parameters are different. As the location of the hot spot stress is the position of the surface crack initiation, the process of the fatigue and fracture failure of a tubular K-joint is thus influenced by the geometrical parameters of this K-joint.
Key words: Tubular K-joints Weld seam
Balanced axial loads Hot spot stress
Geometrical parameters
CLC No: TU398
Received 20060510,
received in revised form 20060801
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