A Model for Estimating Nonlinear Deformation and Damage in Ceramic Matrix Composites (Preprint)

Abstract

The present paper addresses estimation of global deformation of a continuous-fiber brittle matrix composite over a length much larger than the largest microstructural dimension of the composite, such as the fiber diameter and the fiber spacing. Initial microcracks and progressive microcracking of the matrix and interfaces under time-dependent load and temperature are considered. The model also includes consideration of inelastic deformation of one of the constituents. In this paper, the equations of the model are developed and applied to model the stress-strain behavior of several SiC/SiC CMCs and the creep behavior of an oxide/oxide CMC. Comparison with test data shows that the model is able to capture the wide range of deformation behavior seen in these CMCs.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2011
Accession Number
ADA549068

Entities

People

  • Jalees Ahmad
  • U. Santhosh

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Ceramic Matrix Composites
  • Composite Material Fabrication
  • Composite Materials
  • Creep
  • Equations
  • Geometry
  • Materials
  • Mechanics
  • Microcracking
  • Modulus Of Elasticity
  • Residual Stress
  • Silicon Carbide
  • Strain Rate
  • Stress Strain Relations
  • Stresses

Readers

  • Computational Modeling and Simulation
  • Mechanical Engineering/Mechanics of Materials.
  • Reinforced Composite Materials

Technology Areas

  • Space