FE Calculations of J-Integrals in a Constrained Elastomeric Disk with Crack Surface Pressure and Isothermal Load

Abstract

In this study, we performed linear and nonlinear FE (Finite Element) analyses to compute J-integrals for a centrally perforated star-shaped disc, which was made of an elastomeric material, under crack surface pressures and isothermal loads. Deformations of the disc were constrained by a circular steel ring enclosing the disc. Different crack sizes were assumed to exist in the front of the star-shaped notches. For the linear analysis, material compressibility was modeled with Poisson's varying form 0.48 to 0.4999. In addition, with the presence of the crack surface pressure, the J-integral was modified by including an additional line integral. Numerical studies show that the value of the J-integral increases with the increase of the crack length, reaches a maximum value at 1 inch of crack length, and then decreases gradually. Both linear and nonlinear analyses agree qualitatively but differ quantitatively. It is also found that values of the J-integral strongly depend upon the material compressibility.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2004
Accession Number
ADA433687

Entities

People

  • C. T. Liu
  • H. K. Ching
  • S. C. Yen

Organizations

  • Southern Illinois University Carbondale

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Compressive Properties
  • Crack Tips
  • Elastic Materials
  • Elastic Properties
  • Elastomers
  • Engineering
  • Fracture (Mechanics)
  • Hyperelastic Materials
  • Internal Pressure
  • J Integrals
  • Materials
  • Mechanical Engineering
  • Mechanics
  • Modulus Of Elasticity
  • Nonlinear Analysis
  • Shape

Readers

  • Structural Dynamics.
  • Structural Health Monitoring of Composite Structures.