Standard Test Methods for Determination of Fracture Toughness of Advanced Ceramics at Ambient Temperature

Importancia y uso:

5.1 Fracture toughness, K_Ic, is a measure of the resistance to crack extension in a brittle material. These test methods may be used for material development, material comparison, quality assessment, and characterization.

5.2 The pb and the vb fracture toughness values provide information on the fracture resistance of advanced ceramics containing large sharp cracks, while the sc fracture toughness value provides this information for small cracks comparable in size to natural fracture sources. Cracks of different sizes may be used for the sc method. If the fracture toughness values vary as a function of the crack size it can be expected that K_Isc will differ from K_Ipb and K_Ivb. Table 1 tabulates advantages, disadvantages, and applicability of each method.

Subcomité:

C28.01

Referida por:

F2094_F2094M-18A, F2730_F2730M-18A, D7779-20, E2899-24E01

Volúmen:

15.01

Número ICS:

81.060.30 (Advanced ceramics)

Palabras clave:

advanced ceramics; chevron notch; fracture toughness; precracked beam; surface crack in flexure;