抄録
The local fracture stress, such as σF in the Knott model or σu in the Beremin model, has been thought to be independent of temperature, which has been explained by the Griffith equation with constant surface energy γeff.
An application of the mod:f:ed Beremin model gives a more plausible method to correlate the local fracture stress with γeff. It is shown that γeff increases with raise in temperature.
