Fracture Mechanis. Fracture of Notched Wood under Impact Load.

In this study, new methodology is proposed for the study on the fracture under Mode I impact load. Using this method, Mode I impact fracture experiment was carried out at room temperature to study the effect of impact velocity on the Mode I fracture strain of wood by using CT specimen. Impact velocity was about 8-18m/s. The materials used for the experiment were western hemlock, Japanese cypress, Alaska cedar, agathis and tamo lumbers.Mode I impact fracture strain is about half of Mode I static fracture strain.