Blast wave loading pathways in heterogeneous material systems-experimental and numerical approaches

Veera Selvan, Shailesh Ganpule, Nick Kleinschmit, Namas Chandra

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Blast waves generated in the field explosions impinge on the head-brain complex and induce mechanical pressure pulses in the brain resulting in traumatic brain injury. Severity of the brain injury (mild to moderate to severe) is dependent upon the magnitude and duration of the pressure pulse, which in turn depends on the intensity and duration of the oncoming blast wave. A fluid-filled cylinder is idealized to represent the head-brain complex in its simplest form; the cylinder is experimentally subjected to an air blast of Friedlander type, and the temporal variations of cylinder surface pressures and strains and fluid pressures are measured. Based on these measured data and results from computational simulations, the mechanical loading pathways from the external blast to the pressure field in the fluid are identified; it is hypothesized that the net loading at a given material point in the fluid comprises direct transmissive loads and deflection-induced indirect loads. Parametric studies show that the acoustic impedance mismatches between the cylinder and the contained fluid as well as the flexural rigidity of the cylinder determine the shape/intensity of pressure pulses in the fluid.

Original languageEnglish (US)
Article number061002
JournalJournal of Biomechanical Engineering
Volume135
Issue number6
DOIs
StatePublished - 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering
  • Physiology (medical)

Keywords

  • Blast wave
  • Deflection
  • Impedance
  • Pressure
  • Shell thickness
  • Transmission

Fingerprint

Dive into the research topics of 'Blast wave loading pathways in heterogeneous material systems-experimental and numerical approaches'. Together they form a unique fingerprint.

Cite this