Mechanical metamaterials for sensor protection under blast conditions
Fangueiro, R. (editor)
Mechanical metamaterials – man-made materials which derive their unusual properties from their structure rather than their composition (Bertoldi, 2017) – are able to prohibit the propagation of mechanical waves in a pre-defined frequency band, the so-called band gap (Hussein, 2014, Krushynska, 2017). Here we show how metamaterials that exhibit a bandgap can be used to design a mechanical low-pass filter with a given frequency-characteristic, with the goal to protect acceleration sensors under blast and ballistic conditions. These metamaterials should replace improvised methods for sensor protection, which commonly consist of clamped rubbers with a non-reproducible transfer function (Drysdale, 2014). Based on simulations and experiments we demonstrate how our metamaterial performs as an efficient low pass filter according to the designed transfer function.
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TNO, Den Haag
AuxDefense 2020 - 2nd World Conference on Advanced Materials for Defense, Porto, Portugal, 6-8 July 2020