Numerical impact strain response of multi-layered steel–aluminium plate using signal processing

Shahrum Abdullah, M. F. Abdullah, A. S. Zulkefli, N. H. Mazlan

Research output: Contribution to journalArticle

Abstract

This paper investigates the impact strain response resulting from the numerical Charpy impact test of double- and triple-layered steel–aluminium plate employing time–frequency analysis. The potential of the laminated steel–aluminium plate in weight reduction is evaluated using a single-layered specimen as a reference. The signal processing technique in the time–frequency domain is capable of revealing the behaviour and strength of the laminated plate. The time domain signal from the numerical Charpy impact test is transformed into the frequency domain using the power spectrum density and time–frequency domain by the Hilbert–Huang spectrum. The relationship of strain energy from the finite element method and the power spectrum density showed the R2 value of 0.8899, indicating that the power spectrum density can be used as an alternative in calculating the strain energy. In this study, the frequency distribution in the power spectrum density was compared with the Hilbert–Huang spectrum. The triple-layered specimen was found to show better performance with 23% higher maximum strain and 11% more strain energy to fracture, compared to the double-layered specimen. Therefore, the analysis in both frequency and time–frequency domains provide a better understanding of the impact behaviour of the double- and triple-layered plate.

Original languageEnglish
Article number29
JournalJournal of the Brazilian Society of Mechanical Sciences and Engineering
Volume41
Issue number1
DOIs
Publication statusPublished - 1 Jan 2019

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Power spectrum
Signal processing
Strain energy
Finite element method

Keywords

  • Charpy impact
  • Hilbert–Huang spectrum
  • Layered plate
  • Strain signal
  • Time–frequency domain

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Numerical impact strain response of multi-layered steel–aluminium plate using signal processing. / Abdullah, Shahrum; Abdullah, M. F.; Zulkefli, A. S.; Mazlan, N. H.

In: Journal of the Brazilian Society of Mechanical Sciences and Engineering, Vol. 41, No. 1, 29, 01.01.2019.

Research output: Contribution to journalArticle

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