Anisotropic Elastic Materials and Composites with the Effects of Temperature and Piezoelectricity.

Abstract

The objectives of this project were to extend the Stroh formalism for two-dimensional deformations of anisotropic elastic bodies to include heat flow and piezoelectricity, and to apply the theory to study the effects of temperature and piezoelectricity in composites. This report summarizes the accomplishment of the investigation. Several basic solutions are obtained that are fundamental in analyzing more realistic problems in composites. For instance, the displacement at an interface crack between two materials in a composite is oscillatory when the two materials are 'mismatched'. This leads to the physically unacceptable interpenetration of the crack surfaces. However it is saved from a higher order stress singularity when the effects of heat flow is included. On the other hand, when the two materials are 'not mismatched', the interpenetration does not occur but a higher order stress singularity may arise due to heat flow.

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Document Details

Document Type
Technical Report
Publication Date
Nov 20, 1995
Accession Number
ADA310018

Entities

People

  • T. C. Ting

Organizations

  • University of Illinois at Chicago

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Cartesian Coordinates
  • Charge Density
  • Composite Materials
  • Coordinate Systems
  • Differential Equations
  • Displacement
  • Elastic Materials
  • Electric Conductors
  • Equations
  • Heat Transmission
  • Materials
  • Mechanics
  • Piezoelectric Effect
  • Piezoelectric Materials
  • Piezoelectricity
  • Stresses

Readers

  • Aerodynamics/Aeronautics.
  • Structural Health Monitoring of Composite Structures.
  • Theoretical Analysis.