The elastic stresses in non-overlapped and overlapped K joints under axial loading have been obtained by frozen stress photoelastic techniques. The models are representative of joints with stress-relieved, full penetration, ground welds and have brace angles of 45° and 135°. Results are compared with those of similarly shaped models analysed by other techniques (finite element and strain-gauged steel models) and with stress concentrations in joints with the same tube parameters but having different brace arrangements.
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