ASTM E813/E1820 – Standard Test Method for Measurement of Fracture Toughness JIc

This test method covers the determination of JIc which can be used as an engineering estimate of fracture toughness (KIc) near the initiation of slow stable crack growth for highly ductile metallic materials.  Fracture toughness (KIc) is the stress intensity factor at the crack tip for when the crack becomes unstable and failure occurs.

E1820 - Graph 1E1820 - Graph 2