Compressive strain rate sensitivity of ballistic gelatin.
Gelatin is a popular tissue simulant used in biomedical applications. The uniaxial compressive stress-strain response of gelatin was determined at a range of strain rates. In the quasistatic regime, gelatin strength remained relatively constant. With increase in loading rate, the compressive strength increased from 3kPa at a strain rate of around 0.0013/s to 6MPa at a strain rate of around 3200/s. This dramatic increase in strength of gelatin at high rates is attributed to its shear-thickening behavior and is argued on the basis of hydrocluster formation mechanism and differences in internal energy dissipation mechanism under static and dynamic loading.
Kwon
Jiwoon
J
Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, USA.
Subhash
Ghatu
G
D016880:Anisotropy; D040761:Biomimetic Materials / Q000737:chemistry*; D019245:Compressive Strength; D003238:Connective Tissue / Q000502:physiology; D055119:Elastic Modulus; D005780:Gelatin / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D013314:Stress, Mechanical; D014783:Viscosity
D005780:Gelatin