Accession Number:

ADA193050

Title:

Critical Issues and Directions for Fracture Mechanics and Structural Integrity.

Descriptive Note:

Memorandum rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Report Date:

1988-05-13

Pagination or Media Count:

22.0

Abstract:

The development of concepts and methods suitable for the correct analysis of nonlinear inelastic material deformation and fracture is essential for applications of nonlinear fracture mechanics to questions of structural integrity and design. Recent results by the authors have addressed the integration of constitutive behavior and continuum damage concepts in the development of a consistent and versatile fracture mechanics methodology formulation and solution of a constitutive representation application of these ideas to analyses of initiation of defect propagation in complex material-structural systems subjected to monotonically increasing loads. The definition and application of a continuum stress-strain relation and a local continuum toughness results in the ability to scale from test specimen to structure. The formative concepts are reviewed and their application to relevant problems are investigated. Computational analyses coupled to experimental data from material test specimens are used to determine the continuum material properties. Practical applications of the methodology are presented. The results indicate the concepts employed can provide a general approach for the analysis of relevant nonlinear fracture mechanics problems.

Subject Categories:

  • Mechanics
  • Coatings, Colorants and Finishes

Distribution Statement:

APPROVED FOR PUBLIC RELEASE