| 2005 №09 (02) | 2005 №09 (04) |
The Paton Welding Journal, 2005, #9, 13-18 pages
Calculation algorithm for estimation of acceptable size of lack of penetration in welded joints operating under complex cyclic loading
E.A. Velikoivanenko, G.F. Rozynka, N.I. Pivtorak
E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
Calculation algorithm for estimation of acceptable lack of penetration in welded joints under a complex set of cyclic loading (forces and momenta) at a base of 2 108 cycles is considered with respect to welded joints in frames of wind-driven power plants. The use is made of the experimental data on a range of amplitudes of six types of loads by Qj. (j = 1,...,6), as well as numerical solution for nominal membrane and bending stresses in the weld zone, induced by single loads Qj - according to which stresses in the HAZ induced by all loads in a given loading cycle are synthesised by superposition.
Keywords: arc welding, thick-walled parts, welded joints, weld, root, lack of penetration, acceptable size, cyclic loading, calculation algorithm
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