Crack Propagation in Linear and Nonlinear Visoelastic Material

Abstract

The primary objective of this project is tile formulation and analysis of canonical boundary value problems modeling dynamic fracture in elastic and viscoelastic material. The selection of specific problems is guided by a number of goals. (1) One goal is to understand and model a number of surprising experimentally observed features of dynamic crack propagation in brittle polymers that are not predicted by classical linear elastic fracture mechanics. (2) Another goal is to solve dynamic fracture boundary value problems incorporating a crack tip cohesive zone whose constitutive law is derived from micromechanical models of the physical processes occurring at the tip of a growing crack in a brittle polymer. (3) A third goal is to develop combined analytical and numerical solution schemes for the above canonical dynamic fracture boundary value problems which can be used to benchmark and test direct numerical methods for solving such problems.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1999
Accession Number
ADA385246

Entities

People

  • Jay R. Walton

Organizations

  • Texas A&M University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Value Problems
  • Bulk Materials
  • Composite Materials
  • Crack Propagation
  • Crack Tips
  • Cracks
  • Elastic Materials
  • Elastic Waves
  • Equations
  • Fracture (Mechanics)
  • Materials
  • Mathematics
  • Mechanics
  • Simulations
  • Trailing Edges
  • Waves

Readers

  • Distributed Systems and Data Platform Development
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Materials Science (Mechanical Engineering).