Dynamic stiffness and damping of porcine muscle specimens.
The aim of this study was to quantify the mechanical properties of the muscles of the buttock, using dynamic compression (5-->30 Hz). Tests were conducted in vitro on porcine muscles, using a lever arm device, which applied a dynamic load onto cylindrical samples. A two-parameter viscoelastic model allowed the calculation of stiffness and damping of the samples with respect to frequency. The average stiffness curve showed a monotonous increase (5 Hz: 8.5 kN/m-->30 Hz: 347 kN/m). Concerning damping, between 5 and 20 Hz, values were typically inferior to 300 Ns/m, which then increased till 30 Hz (556 Ns/m). The lever arm device may be used to evaluate dynamic properties of other biological tissues also.
D000818:Animals; D002081:Buttocks / Q000502:physiology*; D046508:Culture Techniques / Q000295:instrumentation / Q000379:methods; D004548:Elasticity; D004735:Energy Transfer / Q000502:physiology*; D008954:Models, Biological; D018482:Muscle, Skeletal / Q000502:physiology*; D010812:Physical Stimulation / Q000295:instrumentation* / Q000379:methods*; D013552:Swine; D014732:Vibration; D014783:Viscosity; D016474:Weight-Bearing / Q000502:physiology*