Creep behaviour of butt-welded joints. (English) Zbl 0562.73029
Summary: A theoretical investigation has been made of the strains accumulating in the steady state creep of butt-welded joints. This was done by using a refined plate theory-Cosserat plate theory. Appropriate constitutive equations were developed for the theory which correspond to standard uniaxial and three-dimensional equations. In particular, a choice of Norton’s Law, \(\dot e=A\sigma^ n\) was made. Then, the plane strain problem of a plate containing a weld of different mechanical and creep properties was solved for the case of tensile loading. Results were obtained both numerically and analytically for a wide range of parameter values: for different ratios of the creep strengths, A, of the parent and weld metals,for values of the index, n, (including the limit \(n\to \infty)\) and for values of the length, l, of the weld (including the limit \(l\to 0)\).
MSC:
| 74C99 | Plastic materials, materials of stress-rate and internal-variable type |
| 74K20 | Plates |
| 74A20 | Theory of constitutive functions in solid mechanics |
Keywords:
theoretical investigation; strains; steady state creep; butt-welded joints; refined plate theory-Cosserat plate theory; standard uniaxial and three-dimensional equations; Norton’s Law; plane strain problem of a plate containing a weld; different mechanical and creep properties; tensile loading; numerically; analyticallyReferences:
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