Natural frequency shifts and mode shapes in delaminated textile composite beams

B.M. Dauda, S.O. Oyadiji, P. Potluri

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Using numerical method, this work investigates the effect of delamination on the dynamic properties of fibre-reinforced composite laminates. Delaminated regions within the composite were created along the axial and transverse directions of beam FE model and numerical investigations were carried out using the finite element (FE) method. The Abaqus FE code was used to simulate the natural frequencies of the beams. It was found for the model used in this work that a delaminated length of 25 mm was the minimum delaminated length for acceptable level of delamination. Delamination in the mid-plane of the cross-section significantly affects natural frequency, while the adverse effect of delamination on natural frequency decreases progressively as the delamination moves towards the outer interlaminar layers. The effect of axial location of delamination on the natural frequency depends on whether the delamination coincides with a nodal or anti-nodal position of a vibrating beam. The material properties used in this simulation were determined experimentally; furthermore the numerical results showed good agreement with the experimental results.
Original languageEnglish
Title of host publicationInternational SAMPE Technical Conference
Publication statusPublished - May 2012
Event2012 SAMPE International Symposium and Exhibition - Emerging Opportunities: Materials and Process Solutions - Baltimore, MD; United States
Duration: 21 May 201224 May 2012

Conference

Conference2012 SAMPE International Symposium and Exhibition - Emerging Opportunities: Materials and Process Solutions
CityBaltimore, MD; United States
Period21/05/1224/05/12

Keywords

  • FE model; Fibre reinforced composites; Interlaminar layers; Mode shapes; Natural frequency shift; Textile composite; Vibrating beam

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