BS 6729:1987

Foreword
Committees responsible
Method
1. Scope
2. Definitions
3. Symbols and designations
4. Principle
5. Test pieces
6. Preparation of test piece
7. Test equipment
8. Preliminary procedures
9. Procedure for determination of KIc and COD
10. Test data and calculations
11. Validity check list
12. Test report
Appendices
A. Abbreviated method for determination of dynamic
    fracture toughness of metallic materials
B. Recommended methods for checking response of
    transducers and recorders
Tables
1. Recommended thickness and crack length of test
    pieces used for the measurement of plane strain
    fracture toughness
2. Typical series of figure 5 test piece dimensions
3. Stress intensity coefficient (Y1) for test pieces
    loaded by three point bending over a span to test
    piece width ratio of 4:1
4. Stress intensity coefficient (Y2) for test pieces
    loaded in tension
Figures
1. Proportional dimensions and tolerances for test
    piece A
2. Proportional dimensions and tolerances for test
    piece B
3. Envelope limiting size and form of notch and fatigue
    crack
4. Knife edges for location of crack mouth opening
    gauges
5. Proportional dimensions and tolerances for test
    piece when determinations are made by applying
    a tensile force
6. Details of typical crack mouth opening gauge
7. Test fixture for bending test pieces A and B
8. Test fixture for applying tensile force
9. Principal types of force/crack mouth opening gauge
    displacement records showing the limits of allowable
    force and displacement variation for KIc
    determination
10. Force variation limits for plane strain fracture
    toughness determination
11. Limits of crack mouth opening gauge displacement
    variations for plane strain fracture toughness
    determination
12. Types of force/crack mouth opening gauge displace-
    ment graphs for calculation of COD
13. Limits of force and crack mouth opening gauge
    displacement for COD determination
14. Force and load point displacement variation limits
    for crack opening displacement determination
15. Crack mouth opening gauge displacement variation
    limits for COD determination
16. Limits of loading point displacement variation
    for crack opening displacement determination
17. Examples of good and unacceptable force records
18. Examples of good and unacceptable crack opening
    displacement gauge displacement records
19. Test system for d.c. signal conditioners and
    amplifiers
20. Example of the amplitude output of an instrument as
    a function of the frequency
21. Test system for a.c. transducers