Compressive Mechanical Response of Porcine Muscle at Intermediate (100/s-102/s) Strain Rates

Abstract

Compressive stress-strain response of porcine muscle was experimentally determined at intermediate strain rates (100/s-102/s) in this study. A hydraulically driven materials testing system with a dynamic testing mode was used to perform the compressive experiments on porcine muscle tissue with loading directions parallel and perpendicular to muscle fiber direction. Experiments at quasi-static strain rates were also conducted to investigate the strain-rate effects over a wider range. The experimental results show that, at intermediate strain rates, the porcine muscle’s compressive stress-strain responses are non-linear and strain-rate sensitive. The porcine muscle’s compressive mechanical response exhibits no significant difference between the two fiber orientation cases at quasi-static and intermediate strain rates. An Ogden model with two material constants was adopted to describe the rate-dependent compressive behavior of the porcine muscle.