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Библиогр.: 12 назв.

The paper is devoted to the numerical study of the mechanical response of fluid-saturated biological tissues under dynamic loading. We modeled uniaxial compression of model cubic samples of cancellous, cortical, and cartilage tissues at different strain rates. The mechanical behavior of tissues was described using the particle-based discrete element method and a coupled macroscopic mechanical model of porous fluid-saturated materials with a linear elastic skeleton. The results show that the dependence of the effective elastic moduli and the compressive strength of the considered biological tissues on strain rate is logistic and can be approximated with good accuracy by sigmoid functions. The parameters of approximating sigmoid for each biological tissue depend on its permeability, sample size, and the viscosity of the pore fluid. We showed the possibility of combining these curves into unified dependences of the effective elastic modulus and the compressive strength on the Darcy number.