Table of Contents
SIMULATION OF FRACTURE AND FATIGUE CRACK GROWTH WITH
APPLICATION IN THE AEROSPACE INDUSTRY
Overview
Age of U.S. Military and Commercial Aircraft
Airframe Damage Tolerance Program
Predicting Product Life Using Fracture Mechanics
Crack Modeling
Modeling Cracks With BEASY
Dual Boundary Element Method
Discontinuous Boundary Elements
Stress Intensity Factor Calculation for 3D Models
Corner Crack Next to Hole in Plate
Corner Crack Stress Intensity Factors
Stress Field Near Semi-circular Crack
Semi-Circular Crack SIF Solution
Precise Fracture Mechanics Information
Crack Growth with Residual Stresses
Shot Peening Stress Distribution
SIF Verses Crack Depth
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Superposition of Stress Intensity Factors
Multi Site Damage
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Crack at Countersunk Hole in Lap Joint
Multiple crack fronts can be defined in the same model
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Traditional Airframe Repair Methods
Bonded Patch Repair - A More Modern Approach
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Simulation of Aircraft Skin Repair
Critical Regions Around the Crack
Adhesive Properties Simulated Using Zone Interface
with Internal Springs
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Summary of Simulated Patch Repair
Crack Propagation Model
Load Spectra
Irregular Loading Spectra
Computational Cycle for Numerical Simulation of Crack
Growth
Three-Dimensional Local Coordinate System
Determination of Incremental Direction
Determination of Incremental Distance
Fatigue Crack Growth of Titanium Gear Tooth
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SUMMARY
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