... crack-edge stress field analysis fatigue cracks finite element analysis pressure vessels shapes (structures) stress corrosion cracking structural engineering yield stress In a wide range of industries such as power, chemical, food preparation, nuclear, renewable energy, and armament...

... and a constant internal pressure and (ii) a cyclic temperature load and a constant axial tension. Individual effects of (i) the geometry of the Weld Metal (WM), (ii) the size of the crack, (iii) the location of the crack, and (iv) the yield stress of WM on the ratchet limits, maximum temperature ranges to avoid...

... 5 5 . eigenvalues and eigenfunctions elastic deformation elastic moduli elastoplasticity finite element analysis plastic deformation pressure vessels yield stress plasticity finite element analysis tangent modulus stiffness eigenvalues computational path Plastic...

.... Convergence for the upper and lower bound shakedown limits of the composite cylinders is sought and shakedown limit interaction diagrams of the numerical applications identifying the regions of reverse plasticity limit and ratchet limit are presented. The effects of temperature-dependent yield stress...

... rate and the temperature, including the temperature rise during dynamic loading. The tensile strength and the yield stress of the undermatched joints increase with the strain rate and with the decreasing temperature. The strength of the undermatched zone approaches that of the base metal when...

... and the plane of consideration, is used in evaluating various numerical integrals. The procedure is demonstrated through application to a typical shell nozzle junction. finite element analysis least squares approximations nozzles shells (structures) yield stress stress category least squares fit...

... collapse, step by step. In the first sequence, the plastic collapse of the vessel corresponds to the classical limit state of the rigid perfectly plastic behavior. At the end of each sequence, the yield stress and/or back-stresses are updated with or without geometry updating via displacement velocity...

... Power Research Institute scheme demonstrated that the ratio of ASTM-CTOD to BS-CTOD was not constant but varied according to CTOD changes. Material factors such as the yield stress, the strain hardening exponent, specimen size and configurations influenced the CTOD ratio, and low strain hardening...

... on the measured yield stress. ASME , 2004 , Boiler and Pressure Vessel Code, Document IWA-3300, American Society of Mechanical Engineers, Philadelphia, PA. 2005 , “ Guide on Methods for Assessing the Acceptability of Flaws in Metallic Structures ,” British Standards Institution, BS7910. 2007...

... accurate upper bound shakedown limits. This paper presents a recently developed LMM lower bound procedure for shakedown analysis of structures with temperature-dependent yield stress, which is implemented into ABAQUS using the same procedure as for upper bounds. According to the Melan’s theorem ( 1936...

... analytical model. In this paper, an autofrettage analytical solution considering Young’s modulus and the reverse yield stress dependent on the prior plasticity, based on the actual tensile-compressive curve of the material and the von Mises yield criterion, has been proposed. New model incorporates...

..., in order to determine the plastic initiation load and plastic collapse load by applying the twice-elastic slope (TES) as recommended by ASME. It has been clarified that the collapse (TES) loads are similar to those calculated under the proposed p - M line based on the measured yield stress. The p - M line...

...Vishnu Verma; A. K. Ghosh; G. Behera; Kamal Sharma; R. K. Singh The miniature disk bending test is used to evaluate the mechanical behavior of irradiated materials and their properties (e.g., yield stress and strain hardening exponent) to determine mainly ductility loss in steel due to irradiation...

..., and taking 30% of yield stress as the expected residual thermal stress level, the recommended arc radius of heated region should be 2.2 R t in minimum. 13 04 2006 01 12 2006 23 01 2008 heat treatment thermal stresses yield stress spherical vessel local heat treatment thermal...

... stress and true plastic strain were used to describe isotropic hardening. This means that the yield surface size increase uniformly in all directions, such that the yield stress, increases in all directions as plastic straining occurs. No anisotropy was implemented in the constitutive model. The analysis...

...J. Perry; M. Perl; R. Shneck; S. Haroush The Bauschinger effect (BE) was originally defined as the phenomenon whereby plastic deformation causes a loss of yield strength restraining in the opposite direction. The Bauschinger effect factor (BEF), defined as the ratio of the yield stress on reverse...

... Bauschinger effect pipes wear work hardening internal stresses yield stress autofrettage residual stress distribution Bauschinger effect yield criterion The autofrettage process is a practical method for increasing the elastic-carrying capacity and the fatigue life of a thick-walled tube...

... arrays of three-dimensional unequal-depth cracks at their inner surface. This favorable effect is governed by the ratio of the gun’s material yield stress to its internal pressure— ψ = σ 0 / p . The higher ψ is, the more effective autofrettage becomes. Curve B — K Nmax for the varying...

... 01 12 2004 pressure vessels bending torsion internal stresses yield stress finite element analysis The study concerns the effect of D/T ratio on load interaction in plain pipes. This study is an extension of another study, Ayob 1 , which presented interaction results of a pipe...

... of Hill’s (1950) criterion to describe the yield surface of the equivalent solid plate was observed by Reinhardt (2001). Unlike in the case of triangular penetration pattern, the second-order polynomial satisfies the uniqueness of yield stresses after symmetric rotation in the case of square penetration...