Workgroup Contents

Lecture 12.11 : Stress Analysis of Cracked Bodies

1. INTRODUCTION

2. BASIC SOLUTION FOR A STRESS FIELD IN A PROBLEM OF PLANE ELASTICITY

2.1 Method of Westergaard

2.2 Definition of z (or its derivatives) for the Case of a Through-Thickness Crack of Length 2a in an Infinite Plate (Figure 2)

2.3 Determination of z in the Case of the Griffith Problem

3 CRACK TIP ELASTIC STRESS FIELD FOR GENERAL CRACKING CONDITIONS

4.1 Irwin's Model

4.2 Plastic Zone Contour from Von Mises and Tresca Criteria (Figure 5)

4.2.1 Von Mises Criterion

4.2.2 Tresca Criterion

5. FRONT CRACK YIELDING MODEL OF D S DUGDALE (1960) AND BAREN BLATT (1962)

5.1 Plastic Zone Dimension

5.2 Crack Tip Opening Displacement

6. CONCLUDING SUMMARY