contributor author | A. Mahmoud | |
contributor author | A. H. Shah | |
contributor author | N. Popplewell | |
date accessioned | 2017-05-09T00:14:08Z | |
date available | 2017-05-09T00:14:08Z | |
date copyright | November, 2004 | |
date issued | 2004 | |
identifier issn | 0094-9930 | |
identifier other | JPVTAS-28446#510_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/130668 | |
description abstract | A parallel computational algorithm that models three-dimensional elastic wave scattering in an infinite pipe is introduced. The algorithm combines two procedures: a Wave Function Expansion (WFE) and a Finite Element Discretization (FED). The WFE represents a flawless unbounded region while the FED idealizes a bounded region containing the defects. Unknown amplitudes in the WFE are determined by imposing continuity between the two regions; they are then used to calculate the reflection and transmission coefficients. The inversion of a large stiffness matrix resulting from the FED has been overcome in the current formulation by sub-structuring the finite element mesh. The algorithm is implemented in Fortran 90™ on a shared-memory, parallel computing platform using OpenMP™ directives. The algorithm is validated against available numerical and experimental results. Agreement with previous three-dimensional results for a radial crack in a steel pipe and a two-dimensional hybrid model of an axisymmetric cracked, welded steel pipe are shown to be excellent. New results are presented for an inclined crack in a steel pipe as well as for a non-axisymmetric cracked welded steel pipe. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Parallel Hybrid Algorithm for Three-Dimensional Elastic Wave Scattering in Steel Pipes | |
type | Journal Paper | |
journal volume | 126 | |
journal issue | 4 | |
journal title | Journal of Pressure Vessel Technology | |
identifier doi | 10.1115/1.1762449 | |
journal fristpage | 510 | |
journal lastpage | 517 | |
identifier eissn | 1528-8978 | |
keywords | Steel | |
keywords | Elastic waves | |
keywords | Radiation scattering | |
keywords | Electromagnetic scattering | |
keywords | Fracture (Materials) | |
keywords | Algorithms | |
keywords | Pipes | |
keywords | Stiffness AND Finite element analysis | |
tree | Journal of Pressure Vessel Technology:;2004:;volume( 126 ):;issue: 004 | |
contenttype | Fulltext | |