University of Illinois Urbana-Champaign

Dynamic hybrid finite element analysis of delamination in composites

Kuo, A.Y.; Wang, S.S.

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https://hdl.handle.net/2142/112205

Description

Title
Dynamic hybrid finite element analysis of delamination in composites
Author(s)
  • Kuo, A.Y.
  • Wang, S.S.
Issue Date
1984-04
Keyword(s)
  • Stress Intensity Factor
  • Strain Energy Release Rate
  • Linear Elastic Fracture Mechanics
  • Finite Element Model
  • Dynamic Fracture Mechanics
  • Anisotropy
  • 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.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 466
  • 1984-6004
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112205
Sponsor(s)/Grant Number(s)
Office of Naval Research 84/04 N000 14 79 C 0579 84/04
Copyright and License Information
Copyright 1984 Board of Trustees of the University of Illinois

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Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
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.