Showing papers in "International Journal of Pressure Vessels and Piping in 1986"

TL;DR: In this article, the elastic-plastic fracture mechanics parameter J on specimens of different loading modes and sizes was determined using the fundamental equations of linear elastic fracture mechanics and fully plastic material behaviour.

TL;DR: In this article, a simplified stress classification procedure is proposed to split the clamp-induced pipe stresses into primary and secondary categories, and a non-integral, insulated pipe clamp is used to support high temperature pipes and minimize thermal interaction between the piping and the support system.

TL;DR: In this article, an approach based on the reloading capacity is proposed which is dependent on only two parameters: the extent of prior unloading and the fracture toughness, and a simple lower bound failure criterion is given which avoids most of the uncertainties in input data which are usually associated with integrity assessments.

TL;DR: In this paper, the authors used high-precision creep data obtained for 1 2 Cr 1 2 Mo 1 4 V steel at temperatures from 808 K to 868 K in tests having a maximum duration of only about 1000 h to predict the full creep strain and creep life properties under conditions giving lives up to 100 000 h and more.

TL;DR: In this paper, fabricated steel torispherical heads were tested under internal pressure to determine their buckling and rupture strengths, and 14 buckles formed and a maximum strain of 3·5% was recorded in the spherical portion of the model.

TL;DR: Using the boundary integral equation method for three-dimensional elastostatics, stress intensity factor influence coefficients for a wide range of internal semi-elliptical surface cracks in cylinders with radius ratios 2·0 and 2·5 are obtained as mentioned in this paper.

TL;DR: In this paper, the authors proposed to add to the Creep Fraction Sum an additional term to take account of thermal expansion stresses, which is the ratio of relaxed strain to initial strain.

TL;DR: In this article, a stress analysis of pressure tubes was performed to study stresses produced by volume expansion associated with the precipitation of zirconium hydrides in a ZIRconium matrix in the form of blisters.

TL;DR: In this paper, the results of research programmes conducted by the UKAEA to assess the conditions under which the PWR environment influences crack propagation of low alloy steels under cyclic and steady loading are described.

TL;DR: In this paper, a simple model for the cracked elastic beam is employed to simulate its response to a sharp tap at an arbitrary location, and explicit expressions for the Fourier components of the response of a simply-supported beam make it possible to explore various strategies for detecting the crack via signature analysis and to provide rational explanations for some characteristic responses of cracked beams.

TL;DR: In this article, the presence and the character of grain boundaries, secondary phases, and other defects in the steel structure are investigated from the viewpoint of hydrogen embrittlement effect in low-alloy steels.

TL;DR: In this article, the attenuation of strong pressure waves may occur frequently as undesired phenomena leading to high loading on piping systems of nuclear power plants and chemical industries, and a simple geometrical model of a complete piping system is calculated.

TL;DR: In this paper, the authors identify the corrosion-related defects and their probable causes and suggest approaches to correct and prevent corrosive activity in PWR steam generators, including tube wastage, denting, primary side (ID) intergranular stress corrosion cracking (IGSCC), OD-initiated IGA, pitting, and corrosion fatigue.

TL;DR: In this paper, a leak-before-break approach has been taken on the Darlington nuclear generating station as a design stage alternative to the provision of pipe whip restraints on large diameter, primary heat transport system piping.

TL;DR: In this paper, a metallurgical investigation was performed on specimens from the shell of steam generators Nos 31 and 32 of the Indian Point-3 power plant, and the authors concluded that SA302 Grade B material is susceptible to transgranular stress corrosion cracking (SCC) in constant extension rate testing (CERT) with as little as 1 ppm chloride (as CuCl2) in H2O at 268°C.

TL;DR: In this paper, a general solution for thin-walled curved tubes of circular section is obtained based on Novozhilov's complex force shell equations with linear elasticity and small deformation.

TL;DR: In this article, the analysis of an orthotropic, thick-walled cylinder undergoing creep due to the combined action of internal and external pressures and rotary inertia has been presented.

TL;DR: In this article, the authors investigated cladding residual stress (CRS) and its importance in realistic (best-estimate) lifetime prediction for nuclear reactor pressure vessel pressure vessels.

TL;DR: In this article, the first application of the Pipelock as a novel long-term multicycle protection for piping systems in Boiling Water Reactor plants damaged by intergranular stress corrosion cracking in BWRs is described.

TL;DR: In this paper, the deformation of a thick-walled tube subjected to internal pressure is investigated by an incremental finite element method and the maximum bearing pressure is estimated, compared with some approximate solutions proposed by MacGregor and others.

TL;DR: In this article, the depression at the nozzle corner caused by the trepan removal has been repaired by "temper bead" welding without stress relief heat treatment, similar to the half bead technique of the ASME Boiler and Pressure Vessel Code.

TL;DR: In this article, the authors presented a method for the assessment of defects under primary loading, without the excessive pessimism of treating the secondary loading as primary, but allowing for strain enhancement at reduced ligaments.

TL;DR: In this article, a lower bound on the amount of ductility required for a given material to deform in the plastic domain without instability in the presence of known or assumed manufacturing defects was established.

TL;DR: In this paper, the authors describe the evolution of weld overlay repair designs and suggest that if the obstacle of inspectability can be overcome, it may be possible to consider the weld overlays themselves as the long-term solution.

TL;DR: In this article, a small number of failures have been reported at the extrados of coldbent carbon/carbon manganese steel riser and supply pipes operating at elevated temperatures in power plant boilers worldwide.

TL;DR: In this paper, it has been shown through sulphur printing and fractography that the morphology and distribution of nonmetallic sulphide inclusions play an important part in initiating environmentally assisted crack (EAC) growth which is identifiable by its fan-shaped fracture mode.

TL;DR: The thermohydraulic computer program CHARME-01 is based on the Method Of Characteristics (MOC), which is generally accepted to provide more accurate computational results in comparison with other numerical solution techniques in the calculation of transient thermodynamic phenomena.

TL;DR: In this article, the problem of a stiffened plate containing a through-crack under uniform bending load is analyzed, and the problem is reduced to a singular integral equation, which is then solved numerically by using Gȧuss-Chebyshev and Gauss-Jacobbi quadrature formulas.

TL;DR: In this article, the authors report on a study which sought to establish the procedures to obtain fracture toughness values and provide a comprehensive statement on the toughness of nuclear pressure vessel steels and weldments produced in Japan.

TL;DR: In this article, a J estimation procedure is described which incorporates the effects of mechanical and self-equilibrated thermal and residual stresses, and is applicable to high and low strain hardening materials and validated against elastic-plastic finite element computations for edge and centre cracked plates, and axially and circumferentially cracked cylinders.