Dependence of Some Mechanical Properties of Cortical Bovine Bone on Strain Rate

Experimental studies on bone tissue all reveal important difficulties in data interpretation. This paper deals with study of mechanical properties of cortical bovine bone by tension at different strain rate. Behaviour of samples shows some peculiarties which distinguish them from materials used in the engineering field. Specimens of cortical bovine femur were loaded in tension at strain rates of 0,2 mm/min, 2,0 mm/min, 20,0 mm/min and 200,0 mm/min. Thirty-two specimens were tested. In each group were eight specimens. On the basis of experimental results the Young’s modulus (initial modulus of elasticity), ultimate tensile stress and ultimate tensile strain were determined. Relationships , , and were obtained. The experimental results have showed that increase of strain rate of specimens from 0,2 mm/min to 200 mm/min, ultimate strength, initial modulus of elasticity and ultimate strain increased to 29,42%, 17,57% and 14,2% respectively