Fatigue test of corrugated-plates taken from bellows

not registered; Tsukimori, Kazuyuki*; Iwata, Koji

PNC is promoting the feasibility study of piping bellows expansion joints as one of the measures that rationalize large scale FBR plants, and the fatigue and creep fatigue test of bellows is one of the R&D tests. This report describes the fatigue test and analysis result of the bellows fundamental unit model (corrugated plates) at room temperature. The following is the main result. (1) The fatigue life data of the corrugated plates favorably coincide with the material fatigue curve. (2) The strain response of the corrugated plates can be satisfactorily analized by both theoretical and numerical method. (3) The relationship between the corrugated plate and the bellows (42 inches in diameter) was examined by using the shallow beam theory, the standards of EJMA and unmerical analyses (FEM). As the result there was no remarkable difference between them. (4) The degree of the strain concentration by plasticity in 1 convolution is estimated conservatively due to the factor Ke' (q = 2.0) which is bounded by test and analysis results.