...Mohamed Elfar; Ramin Sedaghati; Ossama R. Abdelsalam Shrink-fit, wire-winding, and autofrettage processes and their combinations can be effectively used to increase the strength and fatigue life of metallic thick-walled cylinders for a given volume. While several numerical solutions have been...

...Rajkumar Shufen; Ngangkham Peter Singh; Uday Shanker Dixit Autofrettage is a widely employed process for strengthening cylindrical or spherical pressure vessels. The process involves applying a uniform load to the inner wall of a vessel to cause a controlled plastic deformation, where the vessel...

... hoop stresses at the bore is 5%. Fig. 8 Near-bore numerical hoop stress profiles, hydraulic autofrettage If there is a significant mismatch (>2%) between the thermally simulated FEA radial and hoop stresses, σ r FEA ( r ) and σ θ FEA ( r...

...Rajkumar Shufen; Nilkamal Mahanta; Uday S. Dixit Recently, a heat treatment technique has been proposed to induce compressive residual stresses at the vicinity of the outer wall of a thermally autofrettaged cylinder. In the proposed technique, the outer wall of a thermally autofrettaged vessel...

...Yuan Gexia; Liu Hongzhao To enhance the pressure capacity and the life of a pressure vessel, different processes such as shrink-fit and autofrettage are usually employed. For autofrettaged and shrink-fit multilayer cylinders, numerical solutions for determining the residual stress distribution...

...D. J. Taylor; T. R. Watkins; C. R. Hubbard; M. R. Hill; W. A. Meith Tantalum refractory liners were explosively clad into cylindrical pressure vessels, some of which had been previously autofrettaged. Using explosive cladding, the refractory liner formed a metallurgical bond with the steel...

...E. Hosseinian; G. H. Farrahi; M. R. Movahhedy Autofrettage is a technique for introducing beneficial residual stresses into cylinders. Both analytical and numerical methods are used for the analysis of the autofrettage process. Analytical methods have been presented only for special cases...

...G. H. Farrahi; E. Hosseinian; A. Assempour Material modeling of high strength steels plays an important role in the accurate analysis of autofrettaged tubes. Although, the loading behavior of such materials is nearly elastic-perfectly plastic, their unloading behavior due to Bauschinger effect...

... was initially developed for the analysis of plane stress and plane strain states. However, the actual autofrettage process is under constant axial strain, i.e., open-end and closed-end conditions. Results indicate very good agreement with the Hencky program. Our method is simple, accurate, and very efficient...

...R. Adibi-Asl; P. Livieri This paper presents an analytical study of spherical autofrettage-treated pressure vessels, considering the Bauschinger effect. A general analytical solution for stress and strain distributions is proposed for both loading and unloading phases. Different material models...

...X. P Huang; W. C. Cui Many analytical and numerical solutions for determining the residual stress distribution in autofrettaged tube have been reported. The significance of the choice of yield criterion, the Bauschinger effect, strain hardening, and the end conditions on the predicted residual...

...Paolo Livieri; Paolo Lazzarin The paper reports analytical solutions valid for residual stresses in cylindrical pressure vessels subjected to autofrettage. The material behavior is thought of as obeying a generic monotonic σ−ε curve and exhibiting the Bauschinger effect during the unloading phase...