A Framework for 3-D Nonlinear Modeling of Thick-Section Composites

Abstract

An architecture is proposed for three-dimensional nonlinear material modeling of thick-section composite laminates, which may have thicknesses ranging from 1/4 in. up to several inches. In this thickness range, there is very little applications-related experience or experimental information available; the potential effects of out-of-plane stresses and strains on material properties and behavior are therefore of great concern. The material is intended to be used as a component of a standard finite element structural analysis package; this places severe practical limits on material model complexity. The model consists of two main components: a laminamicro-model containing fiber and matrix elements and a simplified unit-cell analysis; and a sublaminate model based on a 3D lamination theory which enforces equilibrium of out-of-plane stresses.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1990
Accession Number
ADA232973

Entities

People

  • David A. Pecknold
  • David W Taylor

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Composite Materials
  • Computations
  • Delamination
  • Elastic Properties
  • Engineering
  • Equations
  • Failure Mode And Effect Analysis
  • Laminates
  • Material Modeling
  • Materials
  • Materials Engineering
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Mechanics
  • Structural Analysis
  • Three Dimensional

Readers

  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.