Reliability-based fatigue life of vehicle spring under random loading

Reza Manouchehry Nya, Shahrum Abdullah, Salvinder Singh Karam Singh

Research output: Contribution to journalArticle

Abstract

Purpose: The purpose of this paper is to analyse fatigue-life prediction based on a reliability assessment for coil springs of vehicle suspension systems using different road excitations under random loading. Design/methodology/approach: In this study, a reliability assessment was conducted to predict the fatigue life of an automobile coil spring during different road data surfaces. Campus, urban and highway road surfaces were considered to capture fatigue load strain histories using a data acquisition system. Random loadings are applied on top of a coil spring where coil is fixed from down. Fatigue reliability was established as a system of correlated events during the service life to predict the probability of fatigue life using Coffin–Manson, Morrow and Smith–Watson–Topper (SWT) models. Findings: Fatigue-life prediction based on a reliability assessment revealed that the Morrow model can predict a safe region of a life data point for the three road surfaces. Highway road data indicated the highest rate of reliability at 0.8 for approximately 1.69 × 105 cycles for the SWT model. Originality/value: Reliability assessment of the fatigue life of vehicle coil springs is vital for safe operation. The reliability analysis of a coil spring under random loading excitations can be used for fatigue-life prediction.

Original languageEnglish
JournalInternational Journal of Structural Integrity
DOIs
Publication statusAccepted/In press - 1 Jan 2019

Fingerprint

Vehicle springs
Fatigue of materials
Vehicle suspensions
Reliability analysis
Service life
Automobiles
Loads (forces)
Data acquisition

Keywords

  • Fatigue life
  • Reliability

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Reliability-based fatigue life of vehicle spring under random loading. / Manouchehry Nya, Reza; Abdullah, Shahrum; Singh Karam Singh, Salvinder.

In: International Journal of Structural Integrity, 01.01.2019.

Research output: Contribution to journalArticle

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