Download Stress Determination for Fatigue Analysis of Welded by E. Niemi PDF

By E. Niemi

A distinct file from the foreign Institute of Welding which introduces definitions of the terminology correct to emphasize decision for fatigue research of welded buildings.

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Extra info for Stress Determination for Fatigue Analysis of Welded Components

Sample text

18,37]. It is recommended that the weld and adjacent parts of members are modelled using solid elements, Fig. 27, in order to obtain correct stiffness properties. The remainder of the joint may be modelled with thin shell elements. To connect the shell elements to the solid elements, suitable transition elements have been used. Another possibility is to write constraint equations which make the solid element nodes follow the rotations of the shell elements. 39 g Fig. 26 Details in which thin shell elements are not appropriate.

1 Linear-elastic notch stress approach The effective notch stress approach described in Ref. [24] may be considered as a suitable choice for the long life (high cycle) regime, in which the crack initiation and early growth phases are dominant. fu this approach the weld reinforcement geometry is assumed to be known. This contrasts with the nominal and hot spot stress approaches, in which the local geometry is assumed to be a random variable affecting the statistical fatigue strength of the joint.

2 Circular hollow section joints Circular hollow sections (CHS) are used extensively in offshore structures, in which fatigue is an important failure mode. 4. Finite element analysis is necessary in more complicated cases for which valid parametric formulae cannot be foun

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