The influences of loading rate on fracture toughness, internal bond strength and bending strength, and the effect of notch root radius on fracture toughness were experimentally studied at room temperature for a medium density fiber board.
The results obtained are summarized as follows:
(1) Fracture toughness Kc is independent of both loading rate and notch root radius.
(2) Internal bond strength is independent of loading rate.
(3) Bending strength increases with increasing loading rate.
