A plastic-damage material model for foam concrete under blast loads

Field testing of blast responses and strengthening methods of reinforced autoclaved aerated concrete panels

Through numerical simulation, the blast-resistant performance of spray polyurea elastomer (SPUA) retrofitted concrete masonry unit (CMU) masonry infill walls under far-range blast loading was studied. From an engineering perspective, the effects of boundary conditions and thickness of a SPUA layer on enhancing the blast resistance of masonry infill walls are discussed, and the blast resistance of SPUA-retrofitted and grouted CMU masonry infill walls are compared. It is concluded that the boundary constraint conditions and the anchorage length of SPUA layer have limited improvement on the blast-resistant performance of the wall; the thickness of SPUA layer can significantly improve the blast-resistant performance of the wall as the blast loading increases. In addition, SPUA retrofitting shows relatively better performance to reinforce masonry infill walls.

/pdf/numerical-simulation-of-the-blast-resistance-of-spua-1mntuu7t.pdf

Numerical Simulation of the Blast Resistance of SPUA Retrofitted CMU Masonry Walls

A novel C-sandwich radome (CSR) made of V-shaped woven lattice composites was designed and manufactured in this paper. The optimization of woven lattice configuration, from 1-shaped, V-shaped to foam-filled V-shaped cores, was investigated for improving the mechanical properties of CSR. The blast-resistance and microwave transmission of these CSRs were investigated experimentally. Experimental results indicate that the foam-filling technique improves the blast-resistance of CSR, and only reduces the microwave transmission in the bands of 13.5 GHz to 18 GHz. In the bands of 4.5 GHz to 5 GHz and 7.1 GHz to 9.1 GHz, the transmission of foam-filled CSR still exceeds 90%. Under repeated explosions with the scaled distance changing from 2.565 m/kg1/3 to 0.342 m/kg1/3, the unfilled CSRs experience damage processes from face blackening, facesheet delamination, and through-thickness damage. The through-thickness damage only appears in the foam-filled CSRs when the scaled distance is reduced to 0.171 m/kg1/3. Flexural experiments were carried out to reveal the quasi-static behaviors of the exploded CSRs and evaluate their residual bearing capacities. The proposed CSR exhibits excellent microwave transmission, blast-resistance, and lightweight performances. 

Effects of lattice configuration on multifunctionality of C-sandwich radome

Applied element modelling of unreinforced and reinforced concrete masonry walls under blast loading

Experimental and Numerical Investigation of Polymer-Reinforced and Normal Autoclaved Aerated Concrete Masonry Walls under Large TNT Explosive Loads

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Experimental and Numerical Investigation of Polymer-Reinforced and Normal Autoclaved Aerated Concrete Masonry Walls under Large TNT Explosive Loads