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Q: Which of the following statements with respect to assumptions in the analysis of welded joints is INCORRECT?
  • A. The welds connecting the various parts of a steel structure are homogeneous and isotropic
  • B. Effects of residual stresses, stress concentrations and shape of the welds are considered
  • C. Stresses due to external loads are considered
  • D. The parts connected by the weld are rigid and their deformations are therefore neglected
Correct Answer: Option B - Assumption made in welded joint analysis– (i) Weld connecting various joints are homogenous, isotropic and elastic elements. (ii) Weld joint connected parts are rigid and their deformation is neglected. (iii) In welded connection only stresses due to external forces are considered. Hence, in welded joint, effects of residual stresses, stress concentrated and shape of welds are neglected.
B. Assumption made in welded joint analysis– (i) Weld connecting various joints are homogenous, isotropic and elastic elements. (ii) Weld joint connected parts are rigid and their deformation is neglected. (iii) In welded connection only stresses due to external forces are considered. Hence, in welded joint, effects of residual stresses, stress concentrated and shape of welds are neglected.

Explanations:

Assumption made in welded joint analysis– (i) Weld connecting various joints are homogenous, isotropic and elastic elements. (ii) Weld joint connected parts are rigid and their deformation is neglected. (iii) In welded connection only stresses due to external forces are considered. Hence, in welded joint, effects of residual stresses, stress concentrated and shape of welds are neglected.