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Design of Multi-layered Protection Against Guided Mortar Threats Yhrough Numerical Modeling

Defence Technology（防务技术） 2023年第11期29卷 55-65页

作者： Bonny Thawani Seng Kiat Lim Laura Brown Richard Critchley Rachael Hazael Cranfield Forensic Institute Cranfield UniversityDefence Academy of the United KingdomShrivenhamSN68LAUK

The trade—off between protection and weight is a constant consideration when designing a portable protective *** mobility is a desirable attribute and protection must therefore adapt,prompting a demand for lightweight,simple to construct,low-cost and effective ballistic protection *** strength and ductility,wave spreading capability and good energy absorption are key properties for ballistic *** materials,polycarbonate,Kevlar?-epoxy,polyurethane foam,and aluminium alloy,possess these properties and were selected for analysis by numerical *** configurations were proven to be an optimal solution,by exploiting the advantages of each material without having large penalties of mass and *** modelling using ANSYS AUTODYN?is used to simulate monolithic and multi-layered target configurations,to obtain the penetration mitigation *** results are analysed to select configurations based on different requirements,such as lowest cost,lowest mass,best performance,and optimal configuration which balanced the three key parameters *** optimal configuration of Aluminium,Kevlar-Epoxy,Polyurethane,and Polycarbonate has layers with thickness of 7,3,38,2 mm respectively with a total mass of 7.97 kg,total cost of$39.86 and penetration of 29.34%(14.67 mm).Polynomial relationships between performance and mass/cost are also determined.

关键词： hydrocode Fragmentation High velocity Composite structures Foams

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Development of tuneable effects warheads

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Defence Technology（防务技术） 2016年第3期12卷 255-262页

作者： Mark REYNOLDS William HUNTINGTON-THRESHER Qineti Q Fort HalsteadSevenoaks

The tuneable effects concept is aimed at achieving selectable blast and fragmentation output,to enable one charge to be used in different scenarios requiring different levels of blast and fragmentation *** is a concept Qineti Q has been developing for an energetic fill consisting of three principal components arranged in co-axial layers,two explosive layers separated by a mitigating but reactive *** concept was originally designed to operate in two modes,a low output mode which only detonates the central core of high explosive and a high output mode which detonated both the central core and outer layer of the *** charge case designs where manufactured and tested;one of these designs showed a reduction in blast and fragment velocities of^33%and^20%,respectively,in the low output mode.

关键词： Tuneable effects Multiple effects Blast Fragmentation hydrocode Modelling Trial

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