Deformation of an airfoil-shaped brain surrogate under shock wave loading

Improvised explosive devices (IEDs), during military operations, has increased the incidence of blast-induced traumatic brain injuries (bTBI). The shock wave is created following detonation IED. This propagates through atmosphere and may cause bTBI. As a result, bTBI research gained attention since this injury's mechanism not thoroughly understood. To develop better protection treatment against bTBI, further studies soft material (e.g. surrogate) deformation due to exposure are essential. However, dynamic mechanical behavior materials, subjected high strain rates from exposure, remains unknown. Thus, an experimental approach was applied study interaction between unconfined surrogate fabricated biomaterial (i.e. polydimethylsiloxane (PDMS)). 1:70 ratio curing agent-to-base determined stiffness PDMS (Sylgard 184, Dow Corning Corporation). A stretched NACA 2414 (upper airfoil surface) geometry utilized resemble shape porcine brain. Digital image correlation (DIC) technique measure on surrogate's surface exposure. tube create pressure transducers measured in vicinity surrogate. transient structural analysis using ANSYS Workbench performed predict elastic modulus airfoil-shaped PDMS, at rate order 6 × 103 s−1. Both compression protrusion were found Negative semi-ring area, which protrusion. Oscillation surrogate, loading, found. frequency oscillation does depend geometry. work will add limited data describing materials loading.