Finite element based durability assessment of a free piston linear engine component

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6 Citations (Scopus)

Abstract

A modern computational approach based on finite element analysis for durability assessment in a two-stroke free piston linear engine component using the variable amplitude loadings is presented. This paper describes the finite element analysis techniques to predict the fatigue life and identify the critical locations of the component. The effect of mean stress on the fatigue life is also investigated. The finite element modeling and analysis has been performed using a computer-aided design and a finite element analysis software package, and the fatigue life prediction was carried out using finite element based fatigue life prediction codes. The fatigue crack initiation approach was utilizing to assess the durability of the component of the free piston linear engine. The acquired results utilizing the crack initiation approach indicate that when the loading sequences is predominantly tensile in nature (such as SAETRN loading), the SWT and the Morrow models give shorter life than that obtained using the Coffin-Manson model. However, the Coffin-Manson method gives conservative prediction when the time histories are predominantly compressive (SAESUS loading), and zero mean stress loadings (SAEBKT loading). The results are capable of showing the contour plots of the fatigue life histogram and damage histogram at the most critical location.

Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalSID Structural Integrity and Durability
Volume3
Issue number1
Publication statusPublished - 2007

Fingerprint

Durability
Pistons
Engine
Fatigue of materials
Finite Element
Engines
Fatigue Life
Fatigue Life Prediction
Crack Initiation
Finite element method
Crack initiation
Histogram
Fatigue damage
Fatigue Crack
Software packages
Finite Element Modeling
Computer-aided Design
Stroke
Computer aided design
Software Package

Keywords

  • Durability
  • Fatigue life
  • Finite element
  • Free piston linear engine

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics
  • Building and Construction

Cite this

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title = "Finite element based durability assessment of a free piston linear engine component",
abstract = "A modern computational approach based on finite element analysis for durability assessment in a two-stroke free piston linear engine component using the variable amplitude loadings is presented. This paper describes the finite element analysis techniques to predict the fatigue life and identify the critical locations of the component. The effect of mean stress on the fatigue life is also investigated. The finite element modeling and analysis has been performed using a computer-aided design and a finite element analysis software package, and the fatigue life prediction was carried out using finite element based fatigue life prediction codes. The fatigue crack initiation approach was utilizing to assess the durability of the component of the free piston linear engine. The acquired results utilizing the crack initiation approach indicate that when the loading sequences is predominantly tensile in nature (such as SAETRN loading), the SWT and the Morrow models give shorter life than that obtained using the Coffin-Manson model. However, the Coffin-Manson method gives conservative prediction when the time histories are predominantly compressive (SAESUS loading), and zero mean stress loadings (SAEBKT loading). The results are capable of showing the contour plots of the fatigue life histogram and damage histogram at the most critical location.",
keywords = "Durability, Fatigue life, Finite element, Free piston linear engine",
author = "Rahman, {Mustafiz M.} and {Mohd Ihsan}, {Ahmad Kamal Ariffin} and Shahrum Abdullah and Nordin Jamaludin",
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AU - Mohd Ihsan, Ahmad Kamal Ariffin

AU - Abdullah, Shahrum

AU - Jamaludin, Nordin

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N2 - A modern computational approach based on finite element analysis for durability assessment in a two-stroke free piston linear engine component using the variable amplitude loadings is presented. This paper describes the finite element analysis techniques to predict the fatigue life and identify the critical locations of the component. The effect of mean stress on the fatigue life is also investigated. The finite element modeling and analysis has been performed using a computer-aided design and a finite element analysis software package, and the fatigue life prediction was carried out using finite element based fatigue life prediction codes. The fatigue crack initiation approach was utilizing to assess the durability of the component of the free piston linear engine. The acquired results utilizing the crack initiation approach indicate that when the loading sequences is predominantly tensile in nature (such as SAETRN loading), the SWT and the Morrow models give shorter life than that obtained using the Coffin-Manson model. However, the Coffin-Manson method gives conservative prediction when the time histories are predominantly compressive (SAESUS loading), and zero mean stress loadings (SAEBKT loading). The results are capable of showing the contour plots of the fatigue life histogram and damage histogram at the most critical location.

AB - A modern computational approach based on finite element analysis for durability assessment in a two-stroke free piston linear engine component using the variable amplitude loadings is presented. This paper describes the finite element analysis techniques to predict the fatigue life and identify the critical locations of the component. The effect of mean stress on the fatigue life is also investigated. The finite element modeling and analysis has been performed using a computer-aided design and a finite element analysis software package, and the fatigue life prediction was carried out using finite element based fatigue life prediction codes. The fatigue crack initiation approach was utilizing to assess the durability of the component of the free piston linear engine. The acquired results utilizing the crack initiation approach indicate that when the loading sequences is predominantly tensile in nature (such as SAETRN loading), the SWT and the Morrow models give shorter life than that obtained using the Coffin-Manson model. However, the Coffin-Manson method gives conservative prediction when the time histories are predominantly compressive (SAESUS loading), and zero mean stress loadings (SAEBKT loading). The results are capable of showing the contour plots of the fatigue life histogram and damage histogram at the most critical location.

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