Numerical Modeling of a Propagating Crack

Abstract

In the numerical modeling of the crack propagation in dynamic fracture using stationary elements. a discrete and sudden release of node at the crack tip creates spurious oscillation in the kinetic and strain energy values. In order to reduce the oscillation, a moving node element was utilized. This element can model a continuous crack tip movement more closely. The moving node element is compatible with surrounding regular isoparametric elements and no remeshing is required during the crack propagation. In addition, two different central difference schemes were compared, and their results were almost the same.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1993
Accession Number
ADA272604

Entities

People

  • Clifford Christy

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Energy
  • Engineering
  • Finite Element Analysis
  • Fracture (Mechanics)
  • Frequency
  • Kinetic Energy
  • Mechanical Engineering
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Stiffness
  • Stress Strain Relations
  • Stresses
  • Two Dimensional

Fields of Study

  • Engineering

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Structural Health Monitoring of Composite Structures.