BS 7448-3:2005

Committees responsible
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and designations
5 Principle
6 Test specimens
7 Specimen preparation and fatigue precracking
8 Test equipment
9 Test procedure
10 Analysis of test data
11 Check lists for qualification of data
12 Test report
Annex A (informative) Abbreviated method for determination
                      of dynamic fracture toughness of
                      metallic materials
Annex B (informative) Measurement of load-line displacement,
                      q in a three-point bend test
Annex C (normative) Crack plane identification
Annex D (normative) Recommended methods for checking
                      response of transducers and recorders
Annex E (informative) Abbreviated method for determination
                      of dynamic tensile properties of
                      metallic materials
Bibliography

Defines a method for determining the opening mode plane strain fracture toughness K[Ic], the critical crack tip opening displacement (CTOD) fracture toughness and the critical J fracture toughness of metallic materials.

This part of BS 7448 describes a method for determining the opening mode plane strain fracture toughness KIc, the critical crack tip opening displacement (CTOD) fracture toughness and the critical J fracture toughness of metallic materials. The method uses fatigue precracked specimens tested in displacement control at rates of increase in stress intensity factor greater than 3.0 MPa·m0.5sp1 but less than 3 000 MPa·m0.5sp11) during the initial elastic deformation. Stress intensity factors greater than 3 000 MPa·m0.5sp1 are covered in Annex A. These rates are greater than those permitted in BS 7448-1.

The definition of fracture toughness values relevant to particular structural integrity assessments is outside the scope of this British Standard.

NOTE This standard does not cover integrity assessments. Such assessments are covered in BS 7910.