Finite element model to simulate impact on a soft tissue simulant

Abstract A finite element model of an impact test on a soft tissue simulant, used as part shoulder surrogate, was developed in Ansys© LS-DYNA ® . The surrogate consisted metal hemicylindrical core, with diameter 75 mm, covered 15 mm thick relaxed muscle simulant. simulant 14 layer silicone 1 chamois leather to represent skin. material properties the were obtained via quasi-static compression testing (curve fit hyperelastic models) and compressive stress relaxation Prony series). Outputs models compared against experimental data from tests at energies 4.9, 9.8 14.7 J. accuracy assessed using four parameters: peak force, maximum deformation, duration impulse. 5-parameter Mooney-Rivlin combined 2-term series found be suitable for modelling surrogate. This had under 10% overall mean deviation values assessment parameters across three energies. Overall, provided repeatable method that can adapted help predict injuries skin performance/efficacy personal protective equipment.