Method
1 Scope
2 References
3 Definitions
4 Symbols and designations
5 Principle
6 Test specimens
7 Specimen preparation and fatigue precracking
8 Test equipment
9 Multiple specimen test procedure
10 Single specimen test procedure
11 Analysis of test data
12 Construction of R-curves
13 Derivation of fracture parameters
14 Check lists for qualification of data
15 Test report
Annexes
A (informative) Bibliography
B (normative) Crack plane identification
C (informative) Measurement of load-line displacement, q, in
a three point bend test
D (informative) Single specimen methods
E (normative) Analytical methods for the determination of
Vp and Up
F (normative) Offset power law fit to crack extension
fracture resistance data
Tables
1 Values of g1 (ao/W) for three point bend specimens
2 Values of g2 (ao/W) for compact specimens
Figures
1 Flow chart for the test method
2 Proportional dimensions and tolerances for a single edge
notch bend specimen
3 Proportional dimensions and tolerances for a straight
notch compact specimen
4 Proportional dimensions and tolerances for a stepped
notch compact specimen
5 Acceptable fatigue crack starter notches and fatigue crack
configurations
6 Outward pointing knife edges and corresponding notch
geometries
7 Inward pointing knife edges and corresponding notch
geometries
8 Typical sidegrooved specimen
9 Fixture for three point bend tests
10 Typical design of clevis for applying a tensile force to a
compact specimen
11 Typical design of clevis for applying a tensile force to
a compact specimen (suitable for the single specimen
method employing the unloading compliance technique)
12 Measurement of crack lengths on single edge notch bend
specimens
13 Measurement of crack lengths on compact specimens
14 Single specimen crack extension termination requirement
15 Graphical determination of Vp
16 Determination of Up
17 Data spacing and curve fit
18 Limits to delta or J controlled crack extensions
19 Derivation of delta0.2BL and Jo.2BL
20 Derivation of delta0.2 and J0.2
B.1 Basic fracture plane identification: rectangular
section
B.2 Basic fracture plane identification: cylindrical
sections
B.3 Non-basic fracture plane identification
C.1 Schematic representation of the 'comparator' box
C.2 Displacements associated with single edge notch
bend specimens
C.3 Determination of extraneous displacements for single
edge notch bend specimens
C.4 Location of two notch opening displacement
measurements (V1 and V2) for the determination of
load-line displacement
F.1 General form of the offset power law expression
y = m + l(deltaa)x
List of references