Fracture Toughness Reliability in Polycarbonate: Notch Sharpening Effects

Table 2

Plain strain fracture toughness obtained from F-Type samples, 𝐾_𝐶1 and 𝐺_𝐶1; fracture toughness obtained from S-Type specimens, 𝐾^′_𝐶 and 𝐺^′_𝐶; and plane stress fracture toughness, 𝐾_𝐶2 and 𝐺_𝐶2.

	𝐾IC (MPa·m^1/2)	𝐺IC (kJ/m^2)
Plane strain; F-Type	𝐾𝐶1=3.0±0.2	𝐺𝐶1=4.4±0.4
S-Type	𝐾^′𝐶=4.1±0.3	𝐺^′𝐶=7.7±1.1
Plane stress	𝐾𝐶2=5.3	𝐺𝐶2=14.3