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FE modeling of creep in linear and non‐linear FGM cylinder under internal pressure

FE modeling of creep in linear and non‐linear FGM cylinder under internal pressure Purpose – The purpose of this paper is to investigate creep in an internally pressurized thick‐walled, closed ends cylinder made of functionally graded composite, having linear and non‐linear distribution of reinforcement, using finite element (FE) analysis. Design/methodology/approach – FE‐based Abaqus software is used to investigate creep behavior of a functionally graded cylinder. The cylinder is made of composite containing linear and non‐linearly varying distributions of reinforcement along the radius. The creep behavior has been described by Norton's power law. The creep stresses and strains have been estimated in linear and non‐linear functionally graded materials (FGM) cylinders and compared with those estimated for a similar composite cylinder but having uniform distribution of reinforcement. Findings – The radial stress in the composite cylinder is observed to decreases over the entire radius upon imposing linear or non‐linear reinforcement gradients. However, the tangential stress in the cylinder increases near the inner radius but decreases toward the outer radius, on imposing linear or non‐linear reinforcement gradients. The creep strains in the FGM cylinders are significantly lower than those observed in a uniform composite cylinder. Originality/value – The creep strains in an internally pressurized functionally graded thick composite cylinder could be reduced significantly by employing non‐linear distribution of reinforcement along the radial direction. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Multidiscipline Modeling in Materials and Structures Emerald Publishing

FE modeling of creep in linear and non‐linear FGM cylinder under internal pressure

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References (27)

Publisher
Emerald Publishing
Copyright
Copyright © 2014 Emerald Group Publishing Limited. All rights reserved.
ISSN
1573-6105
DOI
10.1108/MMMS-10-2012-0016
Publisher site
See Article on Publisher Site

Abstract

Purpose – The purpose of this paper is to investigate creep in an internally pressurized thick‐walled, closed ends cylinder made of functionally graded composite, having linear and non‐linear distribution of reinforcement, using finite element (FE) analysis. Design/methodology/approach – FE‐based Abaqus software is used to investigate creep behavior of a functionally graded cylinder. The cylinder is made of composite containing linear and non‐linearly varying distributions of reinforcement along the radius. The creep behavior has been described by Norton's power law. The creep stresses and strains have been estimated in linear and non‐linear functionally graded materials (FGM) cylinders and compared with those estimated for a similar composite cylinder but having uniform distribution of reinforcement. Findings – The radial stress in the composite cylinder is observed to decreases over the entire radius upon imposing linear or non‐linear reinforcement gradients. However, the tangential stress in the cylinder increases near the inner radius but decreases toward the outer radius, on imposing linear or non‐linear reinforcement gradients. The creep strains in the FGM cylinders are significantly lower than those observed in a uniform composite cylinder. Originality/value – The creep strains in an internally pressurized functionally graded thick composite cylinder could be reduced significantly by employing non‐linear distribution of reinforcement along the radial direction.

Journal

Multidiscipline Modeling in Materials and Structures – Emerald Publishing

Published: Jun 3, 2014

Keywords: Finite element method; Modelling; Creep; Abaqus; Functionally graded material

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