Showing papers in "International Journal of Pressure Vessels and Piping in 2011"

TL;DR: In this article, the authors presented nonlinear static analysis of a rectangular laminated composite thick plate resting on a nonlinear two-parameter elastic foundation with cubic nonlinearity, based on first-order shear deformation theory (FSDT).

TL;DR: In this article, the authors provide experimental validation of the approach for simulating ductile failure using finite element methods, recently proposed by the authors, based on a phenomenological stress-modified fracture strain model Incremental damage is defined by the ratio of the plastic strain increment to the fracture strain, and total damage is calculated using linear summation.

TL;DR: In this paper, the authors investigated the stability of sandwich pipe systems and the effect of various significant parameters on the characteristic behavior of the system and proposed a simplified and fairly accurate equation for calculating the pressure capacity of sandwich pipes.

TL;DR: In this article, a three-dimensional analysis of a functionally graded cylindrical shell with piezoelectric layers under the effect of asymmetric thermo-electro-mechanical loads is carried out.

TL;DR: In this article, the effect of metallurgical phase transformations on the residual stresses and distortions induced by laser beam welding in a T-joint configuration using the finite element method was investigated.

TL;DR: In this paper, shape optimization of axisymmetric pressure vessels considering an integrated approach in which the entire pressure vessel model is used in conjunction with a multi-objective function that aims to minimize the von-Mises mechanical stress from nozzle to head.

TL;DR: In this paper, the role of surface defects on static flat seal efficiency is investigated on synthetic "turned-like" surfaces generated by combinations of the first 50 vibrational eigen modes determined from modal discrete decomposition.

TL;DR: In this article, a constitutive analysis was performed on the experimental true stress-true strain data obtained from hot isothermal compression tests on 9Cr-1Mo steel in a wide range of temperatures (1173 −1373 K) and strain rates (0.01 −100 s−1).

TL;DR: In this paper, analytical and numerical elastodynamic solutions are developed for long thick-walled functionally graded cylinders subjected to arbitrary dynamic and shock pressures Both transient dynamic response and elastic wave propagation characteristics are studied in these non-homogeneous structures.

TL;DR: In this article, Faupel's bursting pressure formula is found to be simple and reliable in predicting the burst strength of thick and thin-walled steel cylindrical vessels, which is very important in the engineering design for the oil and gas industry.

TL;DR: In this article, the authors generalize the static shakedown theorem (Melan's theorem) to allow the analysis of plastic shakedown, which is very useful for the design purposes.

TL;DR: In this paper, the Linear Matching Method is used to create the shakedown limit and limit load interaction curves of 90 degree pipe bends for a range of bend factors, including internal pressure and inplane bending.

TL;DR: In this article, an anisotropic tertiary creep damage constitutive model was developed for a bucket material DS GTD-111, which was implemented in a user programmable feature (UPF) in ANSYS FEA software.

TL;DR: In this article, the authors investigated the creep fracture of T92/HR3C dissimilar weld joints and found that the fracture location is at the T92 base material and the connection of adjacent dimples results in transcrystalline fracture.

TL;DR: In this article, a pipe conveying fluid, with a sprung mass moving on it, is studied and the governing equation is obtained in the transverse and longitudinal directions based on the nonlinear Von-Karman sense, by which large displacements may be taken into account.

TL;DR: In this article, a low alloy Cr-Mo steel cylinder with a semi-elliptical crack located at the inner surface is considered and the creep crack driving force parameter C ∗-integrals calculated by finite element (FE) method is compared with results from previous studies, which indicates that empirical equations may be inaccurate under some conditions.

TL;DR: In this article, a non-cyclic method to identify the ratchet boundary directly without the need for cyclic analysis was proposed, and the numerical implementation of the non cyclic method offers the promise to be an attractive alternative to cyclic elastic-plastic analysis since it is simple, and requires considerably less computational effort and computer storage space.

TL;DR: In this paper, a technique for choke valve size prediction based on the meter velocity of approach parameter, which can be used to predict the Valve Coefficient (C v ) for new trim designs is presented.

TL;DR: In this paper, the material parameters of plastic and viscoplastic constitutive equations for modified 9Cr-1Mo steel are developed for various isothermal conditions to support inelastic analysis for a sodium-cooled fast reactor.

TL;DR: In this paper, information on plastic limit loads and both elastic and elastic-plastic fracture mechanics parameters is given for cracked thick-walled pipes with mean radius-to-thickness ratios ranging from two to five.

TL;DR: In this article, an experimental investigation of the critical flashing flow of initially subcooled water through circumferential slits in pipes has been conducted, where critical flow has been seen to occur at higher pressure differentials along the flaws and prominent changes in the flow rate is reported to occur with varying dimensional parameters of the slit or cracks.

TL;DR: In this article, a tensile test on notched rings, cut out from the pipe, was used to investigate the aging effect of the pipe by determining the strain at failure.

TL;DR: In this paper, a finite element analysis model with interference fit and axial load on P-110S conic threaded connections and the tooth load distribution on contact threaded surfaces were investigated.

TL;DR: In this paper, the authors used fracture mechanics for creeping solids (FMCS) tools to predict the resistance to creep failure of pipes under internal pressure by using the fracture mechanics.

TL;DR: In this paper, the Paris constants have been determined for pipe (base) and pipe weld materials by using Compact Tension (CT) specimens machined from the actual pipe/pipe welds.

TL;DR: The behavior of a gasketed flange joint under bending loads has been studied by three dimensional finite element analysis (FEA) and experiments as discussed by the authors, where the in-plane and bending stiffness of spiral wound gaskets are considered using anisotropic Hill plasticity material model.

TL;DR: In this paper, the authors explored the hypothesis that there exists an intrinsic material property, hysteresis damage energy at failure, which could be used as a creep-fatigue life prediction parameter.

TL;DR: In this paper, two approaches for obtaining ratchet boundaries of a structure undergoing cyclic loads are presented: the first approach reduces the Mises-based cylindrical yield surface by Mises stress of the cyclic stress amplitude and the second approach reduces yield strength based on relative orientation of steady primary and cyclic tensors.

TL;DR: In this article, a model relating the hydraulic pressure, the geometric dimensions of the tubulars and the residual contact pressure between the pipes was developed for the application of oil and gas casings.

TL;DR: In this paper, the J integral was calculated for semi-elliptical surface cracks in pipes under bending using three-dimensional finite element analysis for both elastic and elastic-plastic properties.