The toughness of bone is an important feature in preventing it from fracturing. We consider the notch sensitivity in impact, and the associations between brittleness, notch sensitivity and post-yield energy absorption of mammalian mineralized tissues. Specimens of bone-like tissues covering a wide range of mineralization were broken, either notched or un-notched, in impact. The greater the mine...

OBJECTIVE To determine the course of brittle diabetes. DESIGN 12 year follow up of patients identified in 1977-9 as having brittle diabetes; retrospective review of the case notes. SETTING Nottingham health district. SUBJECTS 25 brittle diabetic patients were identified in 1979-9; 11 (five men) had three or more admissions with ketoacidosis between June 1977 and 1979 and 14 (eight men) ha...

Abstract To quantitatively evaluate the influence of high true three-dimensional stresses on ductile–brittle behaviours rock in deep underground engineering, a series triaxial compression tests with different stress levels were carried out marble and four kinds granite. The influences states ( σ 2 , 3 ) post-peak characteristics analysed, new normalized evaluation index was proposed based energ...