Design of resonant structures in resin matrix to mitigate the blast wave with a very wide frequency range

Abstract

In this work, resonant structures (RSs) are embedded in the resin matrix to form the micro-scale artificial composite materials to mitigate the blast wave with a very wide frequency range (BWR). The propagation of stress waves in the resin and composite materials is described, and the composite materials exhibit stronger blast wave attenuation characteristic compared with the pure resin material. The attenuation mechanism of the composite materials is explained in detail through the absorption, storage and conversion of impact energy. In addition, the influences of materials of the RSs on the performances of the composite materials are analyzed, and the RS is redesigned to further improve the attenuation effect of the composite material. Equivalent model of the composite material is first proposed and established based on the weakly nonlinear lattice system (WNLS). At the same time, artificial tree algorithm is applied to design its spring stiffness parameters. Based on the WNLS, a three-dimensional composite material plate structure is built to mitigate the overpressure of blast wave at the macro-scale. Compared with traditional materials, the composite material exhibits superior attenuation effect and greater lightweight.

Sandwich Structures With Bio-Inspired Viscoelastic Optimized Suture Face Sheets for Blast Mitigation

“…The phenomena of shock disintegration and energy trapping are observed in composite granular media consisting of ensembles of beads with alternating material properties. 1 The concepts of elastic metamaterials 2 and resonant structures embedded in resin matrix 3 to create artificial composite materials are also numerically explored and found to attenuate blast waves in a specific and wider frequency range as well. External measures like using different obstacles based on geometry that can trap shock waves 4 and spraying of water droplets in a confined geometry 5 are also shown to produce blast mitigation effect.…”

Meta-Material Layout for the Blast Protection of Above-Ground Steel Pipes

“…Various other concepts were developed within the broader field of meta-materials for the same scope. Among them are plate-like meta-structures for explosions' vibration attenuation [54], resonant structures in resin matrixes for the mitigation of blast waves [55], elastic meta-materials for blast wave impact mitigation considering non-linearity [56,57], negative effective mass [58] and locally resonant woodpile meta-materials for impact and blast mitigation [59]. Despite the significant interest in the development of meta-material concepts for structures' blast protection, a gap in the designing of meta-materials specifically for EIs and pipelines is observed.…”

Application verification of blast mitigation through the use of thuja hedges

“…Also, the steel posts were tested regarding their protective potential by the same group (Xiao et al, 2018(Xiao et al, , 2020a; both the overpressure and overpressure impulse were reported to be reduced similarly from about 11% to about 33%. Li et al (2020) proposed and modelled the composite material, which gives a much smaller lightweight and presents much greater mitigation performance than other traditional materials; however, it was simulated on the small-scale model. Many scientists also explored the protective potential of water, like a mist/ mist-curtain (Kong et al, 2019;Schunck et al, 2020;Willauer, 2009), water-filled containers or walls (Chen et al, 2015;Zhang et al, 2016;Zhu et al, 2018).…”