Physico–Mechanical Characteristics of Biomaterial Patches for Numerical Modeling Problems

A full-scale study of the physical and mechanical properties of a number of samples of commercial biomaterials- patches was carried out. It is shown that all materials have a pronounced non-linearity of behavior, manifested in the presence of an initial gentle stress section with a subsequent increase in stiffness, however, there are quantitative differences in the length of these sections and, accordingly, in the final characteristics: tensile strength, elongation at break, elasticity. The results of numerical verification of the obtained coefficients of hyperelastic materials models showed high convergence with the results of field tests. Keywords: numerical modeling, physical and mechanical tests, hyperelastic material model, polynomial approximation.