Abstract
Small-scale blast tests were carried out to observe and measure the influence of sandy soil towards explosive blast intensity. The tests were to simulate blast impact imparted by anti-vehicular landmine to a lightweight armoured vehicle (LAV). Time of occurrence of the three phases of detonation phase in soil with respect to upward translation time of the test apparatus were recorded using high-speed video camera. At the same time the target plate acceleration was measured using shock accelerometer. It was observed that target plate deformation took place at early stage of the detonation phase before the apparatus moved vertically upwards. Previous data of acceleration-time history and velocity-time history from air blast detonation were compared. It was observed that effects of soil funnelling on blast wave together with the impact from soil ejecta may have contributed to higher blast intensity that characterized detonation in soil, where detonation in soil demonstrated higher plate velocity compared to what occurred in air blast detonation.
Highlights
Vehicles that operate in conflict zones are susceptible to landmine or IED threats
This paper presents the finding of experimental tests of the blast loading from detonation of shallow buried explosive on target plate acceleration with correlation to detonation phase of explosion in soil
Optical observation presented in this paper is the observation that was carried out in buriedin-soil test. This is to demonstrate its correlation with detonation phases in soil which see the effect and time of impact from soil ejecta
Summary
Vehicles that operate in conflict zones are susceptible to landmine or IED threats. Explosive shock front from detonation of landmine could damage the vehicle and the impact could cause bodily injuries due to vehicle floor board deformation and acceleration [1]. Depending on soil types and conditions, when shallow buried explosive is detonated, the impact delivered to the above ground object or structure impart distinct intensity of blast loading. This has been observed in numerous experimental works [2] [3] [4] [5] that were carried out to investigate the phenomenon. Soil properties and conditions such as moisture content, particle size distribution, density and depth of burial (DoB) of the explosive charge are reported to be key dependent factors in causing variations in blast intensity of a landmine explosion [6] [7]
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