THE 3D-MODEL OF RAT’S HUMERI TESTING TOUGHNESS PROPERTIES FOR VARIOUS DEFORMATION

The article is devoted to study toughness of rat’s humeri testing them for stiffness, strength and stretching. Our aim is to create a 3D-model of the long bone for rats of different age. This model will allow conducting numerous toughness tests changing the initial parameters. The portable experimental unit, with the measuring scale accurate to 0.25 kg, was used to test stretching of the humeri. Evaluation of toughness was carried by Pro/Engineer software package (PTC, USA) and included Pro/Mechanica modulus. The minimal value of critical toughness was measured in the bones of sucking rats. Value of stretching showed almost directly proportional dependence between critical bone toughness and rat’s age. Having compared experimental data and calculations of crack load values, we pointed that value deviation was less than 7 %. The 3-D image of the long bone for rats of different age can be frequently used for various deformation influences and with different initial parameters of the bone tissue.