Influence of Charge Locations on Close-in Air-blast Response of Pre-tensioned Concrete U-girder

It is important to understand the effect of curvature on the blast response of curved structures so as to seek the optimal configurations of such structures with improved blast resistance. In this study, the dynamic response and protective performance of a type of curved metallic sandwich panel subjected to air blast loading were examined using LS-DYNA. The numerical methods were validated using experimental data in the literature. The curved panel consisted of an aluminum alloy outer face and a rolled homogeneous armour (RHA) steel inner face in addition to a closed-cell aluminum foam core. The results showed that the configuration of a “soft” outer face and a “hard” inner face worked well for the curved sandwich panel against air blast loading in terms of maximum deflection (MaxD) and energy absorption. The panel curvature was found to have a monotonic effect on the specific energy absorption (SEA) and a nonmonotonic effect on the MaxD of the panel. Based on artificial neural network (ANN) metamodels, multiobjective optimization designs of the panel were carried out. The optimization results revealed the trade-off relationships between the blast-resistant and the lightweight objectives and showed the great use of Pareto front in such design circumstances.

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Repeated Air Blast Response of Sisal Fibers Reinforced Bio-composites

Procedia Engineering ◽

10.1016/j.proeng.2016.11.688 ◽

2016 ◽

Vol 167 ◽

pp. 197-205 ◽

Cited By ~ 1

Author(s):

Zana Eren ◽

Zafer Kazancı ◽

Halit S. Türkmen

Keyword(s):

Air Blast ◽

Blast Response ◽

Sisal Fibers

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The influence of interfacial bonding on the response of lightweight aluminium and glass fibre metal laminate panels subjected to air-blast loading

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406217718859 ◽

2017 ◽

Vol 232 (8) ◽

pp. 1402-1417 ◽

Cited By ~ 1

Author(s):

Genevieve S Langdon ◽

CJ von Klemperer ◽

GF Volschenk ◽

T van Tonder ◽

RA Govender

Keyword(s):

Bond Strength ◽

Epoxy Resin ◽

Glass Fibre ◽

Blast Loading ◽

Adhesion Properties ◽

Air Blast ◽

Blast Response ◽

Fibre Metal ◽

Fibre Metal Laminate ◽

Air Blast Loading

This paper examines the effects of glass fibre configuration and epoxy resin type on the response of glass fibre epoxy-based fibre metal laminate panels. These lightweight materials are excellent candidates for use in transportation applications, where mass is a major factor in design and materials selection. Interfacial bond strength was characterised through single leg bend testing and revealed varying failure characteristics for different epoxy configurations and surface treatments. A combination of bead blasting and silane treatment provided the best surface treatment for the aluminium, while SE84 epoxy resin gave superior adhesion properties compared to Prime 20ULV. Blast tests were performed to investigate the effect of bond strength on panel response under localised and more uniformly distributed air-blast loading conditions. Dimensionless analysis and failure mode identification were used to show that both fibre configuration and bond strength played a role in blast response but the bond strength (and particularly resin type) was more prominent.

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