1. 1. ASTM E1290 (1989 ) Standard Test Method for Crack-Tip Opening Displacement (CTOD) Fracture Toughness Measurement.
2. 2. BSI Document 90/41825 DC (1990 ) Draft British Standard Fracture Mechanics Toughness Tests. Part 1. Method for Determination ofK1c, Critical CTOD and Critical J Values of Metallic Materials.
3. 3. ASTM E399 (1983 ) Standard Test Method for Plane-Strain Fracture Toughness of Metallic Materials.
4. 4. BS 5447 (1977 ) Methods of Test for Plane Strain Fracture Toughness (K1c) of Metallic Materials.