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Title:Dynamic hybrid finite element analysis of delamination in composites
Author(s):Kuo, A.Y.; Wang, S.S.
Subject(s):Stress Intensity Factor
Strain Energy Release Rate
Linear Elastic Fracture Mechanics
Finite Element Model
Dynamic Fracture Mechanics
Composite Materials
Abstract:This research develops an accurate and efficient numerical technique, finite element method with hybrid stress crack-tip elements, for analyzing delamination problems under dynamic loading. Hybrid stress crack-tip elements for interfacial cracks of composite laminates are formulated by setting the first variation of a hybrid functional equal to zero. During the element formulation, asympototic solutions around the crack tip are employed for stress and displacement fields within the crack tip element. Displacements along the element boundaries are interpolated independently. Newmark's method is used for integrating dynamic equations. Thus, monotonic convergence of the finite element solutions is guaranteed. Two different kinds of delaminations, open and closed interfacial cracks, under lateral impacts are studied. Effects of element size, element aspect ratio, and eigenfunction truncation have been investigated. Transient solutions of (± θ) composites will be presented for illustrartion. Effects of different delamination sizes and lamination sequences are discussed.
Issue Date:1984-04
Publisher:Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report:TAM R 466
Genre:Technical Report
Sponsor:Office of Naval Research 84/04 N000 14 79 C 0579 84/04
Rights Information:Copyright 1984 Board of Trustees of the University of Illinois
Date Available in IDEALS:2021-11-04

This item appears in the following Collection(s)

  • Technical Reports - Theoretical and Applied Mechanics (TAM)
    TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.

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