Failure behaviour of human trabecular bone

A trabecular bone tissue with its complex microstructural morphology can demonstrate a and random pattern of fracture. This paper analyses the effect material’s mechanical behaviour on failure modelling human bone. For this purpose, 3D unit cell was obtained from scans distal tibia performed high-resolution peripheral quantitative computed tomography (HR-pQCT). In simulations, two types fracture trabeculae were considered - brittle ductile, respective elastic elastoplastic formulations. Two loading – tension compression applied to in order assess stress state locations onset. Positions damaged areas case brittle-fracture approach differed for compression, while same damage regions observed ductile criterion both conditions. It found that first resulted about times higher effective strength as compared second approach: 11.49 MPa 4.94 MPa, respectively. The calculated values material models are good agreement magnitudes tensile compressive reported literature. Effective parameters ultimate well yield considerably lower than those individual trabeculae: some 8% trabeculae.