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DTD Handbook

Handbook for Damage Tolerant Design

  • DTDHandbook
    • About
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    • Sections
      • 1. Introduction
      • 2. Fundamentals of Damage Tolerance
        • 0. Fundamentals of Damage Tolerance
        • 1. Introduction to Damage Concepts and Behavior
        • 2. Fracture Mechanics Fundamentals
        • 3. Residual Strength Methodology
        • 4. Life Prediction Methodology
        • 5. Deterministic Versus Proabilistic Approaches
        • 6. Computer Codes
          • 0. Computer Codes
          • 1. Structural Analysis
          • 2. Life Prediction
          • 3. PRobability Of Fracture (PROF)
        • 7. Achieving Confidence in Life Prediction Methodology
        • 8. References
      • 3. Damage Size Characterizations
      • 4. Residual Strength
      • 5. Analysis Of Damage Growth
      • 6. Examples of Damage Tolerant Analyses
      • 7. Damage Tolerance Testing
      • 8. Force Management and Sustainment Engineering
      • 9. Structural Repairs
      • 10. Guidelines for Damage Tolerance Design and Fracture Control Planning
      • 11. Summary of Stress Intensity Factor Information
    • Examples

Section 2.6.1. Structural Analysis

FRANC2D/L is a highly interactive finite element program for the small deformation analysis of two-dimensional structures. As such, it is useful for engineering calculations or for instruction in finite element and fracture courses. Linear elastic fracture mechanics analyses can be performed with automatic remeshing as the crack grows. The layered capability allows the user to model riveted and adhesively bonded structures, such as lap joints and bonded repairs. Elastic-plastic material behavior is also available. This allows the user to model tearing with the critical crack tip opening angle approach. This provides the full capability of growing a fatigue crack and calculating residual (tearing) strength as a function of crack length.

FRANC2D/L is an extension of FRANC2D, which was originally written by Paul Wawrzynek at Cornell for the analysis of crack growth. A key concept in his work was the use of a winged-edge data structure to describe the geometry. This greatly facilitates automatic remeshing during crack growth.