Showing papers in "International Journal of Pressure Vessels and Piping in 2014"

TL;DR: In this paper, a dissimilar welding between Inconel 718 nickel-base superalloy and 310S austenitic stainless steel using gas tungsten arc welding process was performed to determine the relationship between the microstructure of the welds and the resultant mechanical and corrosion properties.

TL;DR: In this article, a recent study on weld residual stress relief mechanisms associated with furnace-based uniform post-weld heat treatment (PWHT) is presented, where both finite element and analytical methods are used to quantitatively examine how plastic deformation and creep relaxation contribute to residual stress recovery process at different stages of PWHT process.

TL;DR: In this article, nonlinear static and dynamic responses of shallow spherical shells resting on Winkler-Pasternak elastic foundations are carried out, where the nonlinear governing equations of motion of shallow shells are discretized in space and time domains using the discrete singular convolution and the differential quadrature methods, respectively.

TL;DR: In this paper, a preliminary investigation of the through-thickness 2D residual stresses distributions, distortions, and plastic strain characteristics, for the narrow gap laser welding (NGLW) process using material thicknesses up to 20mm.

TL;DR: In this article, a structural strain method is presented to extend the early structural stress based master S-N curve method to low cycle fatigue regime in which plastic deformation can be significant while an elastic core is still present.

TL;DR: In this paper, the authors examined the creep crack growth behavior of Type 316H stainless steel at a wide range of load levels using finite element simulations, and compared the results in terms of the specimen constraint effects on the crack growth behaviour of the material.

TL;DR: In this paper, the European network NeT round-robin activities on measuring and simulating the residual stresses generated by laying a single weld bead on a flat austenitic steel plate are reviewed.

TL;DR: In this article, the authors measured four steel components created by electron beam (EB) welding to obtain their residual stress distributions, and compared the predicted residual stresses with the measurements, and found that the peak residual stresses occur either side of the weld outside of the heat affected zone, with magnitudes corresponding to parent material yield strengths.

TL;DR: In this article, a detailed assessment of existing residual stress profiles stipulated in widely used fitness-for-service assessment codes and standards, such as BS 7910 Appendix Q and API 579 RP Annex E, by taking advantage of some comprehensive residual stress studies that have recently become available, is provided.

TL;DR: In this article, the interaction of electric potentials, electric displacement and elastic deformations in inhomogeneous piezoelectric hollow cylinders has been analyzed and the analytical solution has been obtained to describe the hygrothermal responses of these cylinders.

TL;DR: In this article, the authors studied the buckling of shallow clamped spherical shells made of functionally graded material (FGM) and surface-bonded piezoelectric actuators under the thermo-electro-mechanical loading.

TL;DR: In this paper, a methodology for the fatigue analysis of pipelines containing corrosion defects is proposed, which is based on the nominal stresses from a Global Analysis using a one-dimensional Finite Element (FE) model of the pipeline together with the application of stress concentration factors (SCFs).

TL;DR: In this paper, the use of acoustic emission (AE) and ultrasonic techniques for monitoring crack initiation/growth during ratcheting studies on a straight pipe made of 304LN austenitic stainless steel under reversed four point bending.

TL;DR: In this article, a stress-based methodology to assess complex heterogeneous welds using a J-based approach was proposed, which is suitable for implementation in a homogenized J-integral estimation scheme.

TL;DR: In this article, the burst pressure of super duplex stainless steel pipe is measured under combined internal pressure, external axial tension and elevated temperature up to 160°C, and the experimental results are compared with existing burst pressure prediction models.

TL;DR: In this paper, the effect of weld metal heterogeneity on the structural integrity of welded connections was examined by defining local microstructures using a stress-strain model that describes two-stage strain hardening.

TL;DR: In this article, a two-parameter description of crack-tip fields in bend and tensile fracture specimens incorporating the evolution of near-tip stresses following stable crack growth with increased values of the crack driving force as characterized by J is presented.

TL;DR: In this paper, the use of a reference load instead of the common limit load was proposed to provide more exact fracture mechanics predictions, but showed also a wider and more general application range than the conventional parameter.

TL;DR: In this paper, the probabilistic characteristics of the model errors associated with five well-known burst capacity models/methodologies for pipelines containing longitudinally-oriented external surface cracks, namely the Battelle and CorLAS™ models as well as the failure assessment diagram (FAD) methodologies recommended in the BS 7910 (2005), API RP579 (2007) and R6 (Rev 4, Amendment 10).

TL;DR: In this article, the effect of creep constitutive equation on simulated stress mitigation behavior during post-weld heat treatment (PWHT) has been clarified for analytically estimating residual stress in the welded region.

TL;DR: In this paper, the effect of interaction of the longitudinally aligned LTAs on the elbow failure pressure was investigated through parametric finite element analyses and verified by well-known codes and formulas.

TL;DR: In this article, an analytical solution for the displacement field and corresponding stress state in multi-layer cylinders subjected to pressure and thermal loading is developed for axially loaded and spring-mounted cylinders, assuming that the combined multilayer cross-section remains plane after deformation.

TL;DR: In this article, the authors used the tuned SRDD model for the simulation of axial crack propagation and arrest in X100 natural gas pipelines, and the model correctly predicted the crack initiation (burst) pressure, the crack speed and the crack arrest length.

TL;DR: In this paper, the authors present examples of in-service damage and discuss best option repairs for Type IV cracking in the fine grained or intercritically heat treated regions of the heat affect zone.

TL;DR: In this article, the ratchet boundaries and ratchet strains are derived for the Bree problem and an elastic-perfectly plastic material with different yield stresses on-load and off-load.

TL;DR: In this article, an ultrasonic method in stress measurement through thickness of a pressure vessel was used to measure the welding residual stresses in a vessel constructed from austenitic stainless steel 304L.

TL;DR: In this article, the equivalence relation between the setting round process and the circle-oval process, and the similarity relation in the circleoval process between the pipe-end and the short pipe are studied.

TL;DR: In this article, the combined effect of ovality and variable wall thickness on collapse load of pipe bends under in-plane opening bending moment with internal pressure was investigated using finite element limit analysis considering large geometric change effect.

TL;DR: In this paper, a hybrid method composed of the layerwise theory, differential quadrature method (DQM), and Fourier series expansion is employed for transient analysis of functionally graded (FG) truncated conical shell with variable thickness, subjected to asymmetric dynamic pressure.

TL;DR: In this paper, a non-cyclic simplified technique for determining elastic shakedown limit loads of 90° back-to-back pipe bends is used to generate the elastic sh takedown boundary of the analyzed structure.