Blast and Impact Dynamics

Department of Civil & Structural Engineering

Dr Andrew Barr

Research Associate
Andrew Barr


Department of Civil and Structural Engineering
Sir Frederick Mappin Building
Mappin Street,
S1 3JD


Andrew joined the group as a PhD student after graduating from The University of Sheffield with an MEng (Hons) in Structural Engineering and Architecture.

He researches how the properties of soils can be used to protect people from the effects of explosions and high-velocity fragments, including

  • High-pressure characterisation of geomaterials
  • Strain-rate effects in soils
  • Moisture content variation in gabion structures


MEng (Hons), Structural Engineering and Architecture, The University of Sheffield, 2012
PhD, The University of Sheffield, 2016


dispersion.m - A MatLab script for phase angle and amplitude correction of pressure bar signals

In processing the signals from split Hopkinson pressure bar (SHPB) experiments it is often assumed that longitudinal stress waves in the pressure bars propagate one-dimensionally at a common velocity c_0, and so measurements taken at the strain gauges are often simply translated to the end of the bar using a...

Research project(s)

Strain-rate effects in quartz sand

Soil-filled wire and geotextile gabions are commonly used to construct perimeter walls and other defensive infrastructure in military bases. They serve to protect personnel and key assets from the effects of blast and fragmentation. The attenuating properties of soil make it a highly effective defence against such threats, and as...

Local variations of moisture content and density in gabion structures

Gabion Moisture Content
Gabion structures are widely used for force protection as they enable locally available material to be used, reducing logistical expense. The soil fill within these structures provides the blast and ballistic resistance, hence any localised variation in the contained soil can potentially lead to reductions in protective capability. Specifically built...


(2013). Strain rate and moisture effects on sand response. In 1st UK Defence Seminar on the High Strain Rate Properties of Soils and Granular Media , Abstract: As part of the UK MoD Force Protection Engineering programme, research has been conducted looking into the fundamental driving forces behind large scale physics. This has involved conducting both quasi-static (Mac2T) and dynamic (Split Hopkinson Pressure Bar) on sands of varying moisture contents...