Histological alterations during fracture healing were observed, and percentage of trabecular bone, cartilage and fibrous tissue in the bony callus was determined.
观察骨折愈合的组织学变化，并测定骨痂中小梁骨、软骨、纤维组织所占百分比。
2
An energy method for determining fracture toughness of fibrous composite laminates was based on the theory of elastic energy release rate and crack-growth resistance in this paper.
Within the range of test temperature, the factors controlling the toughness are fracture loads, the lengths of fibrous crack, and the energy absorbed by each fibrous crack extension.