A Hybrid Approach to Composite Damage and Failure Analysis Combining Synergistic Damage Mechanics and Peridynamics

Abstract

In most manufacturing processes for polymer matrix composites (PMCs) one starts with dry bundles of fibers. On resin infusion, the initially closed-pack fibers are spread out to the degree dictated by the intended fiber volume fraction, resulting in disordered fiber distributions and defects such as voids in the matrix. Pores, manufacturing defects, holes and round notches are locations where fatigue cracks may initiate or arrest, depending on the loading conditions. We introduce a new peridynamic model for materials with pores based on an Intermediate Homogenization Model (IHM). We investigate how the new model compares with the classical homogenization approach for dynamic elasticity as well as for crack and damage evolution. This model will allow us to model pores, voids, manufacturing defects in a composite material without having to represent the exact shape and size of such defects, which would require a very costly, fine discretization for computing the solution.

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2016
Accession Number
AD1017997

Entities

People

  • Florin Bobaru
  • Ramesh Talreja

Organizations

  • Texas Engineering Experiment Station

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Department Of Defense
  • Engineering
  • Failure Analysis
  • Failure Mode And Effect Analysis
  • Materials
  • Mechanics
  • Micromechanics
  • Modulus Of Elasticity
  • Peridynamics
  • Personal Information Managers
  • Polymer Matrix Composites
  • Porosity
  • Porous Materials
  • Resin Transfer Molding
  • Resins

Readers

  • Applied Combinatorial Optimization and Logic Circuit Design.
  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.