This work is a part of larger research effort to better understand the combined effect blast wave and fragment impacts following detonation shrapnel bomb. It known that time interval Δt, which represents difference in arrival between front at position given target object, has significant influence on its response mode. paper presents insights into establishment laboratory scale technique genera...

In order to study the dynamic response of tungsten heavy alloy materials under explosive loading, two kinds typical alloys for explosively formed projectile (EFP) liner and one kind existing EFP were tested in a flash X-ray experiment, with copper as reference. Results showed that could form coherent EFP, while 90W–9Ni–Co W–25Re liners fractured different extents. The microscopic features three...

Sets of explosive and heating devices for experimental study strength composite constructions aircraft against complex thermal mechanical action radiation particles fluxes different physical nature are considered. Two new generating low-pulse loads microsecond duration proposed. Devices based on thermoelectric elements, conductive plates pyrotechnic compositions applied to the surface tested st...

Composite sandwich materials have yet to be widely adopted in the construction of naval vessels despite their excellent strength-to-weight ratio and low radar return. One barrier to their wider use is our limited understanding of their performance when subjected to air blast. This paper focuses on this problem and specifically the strength remaining after damage caused during an explosion. Carb...

Underbelly blasts to vehicles from improvised explosives cause severe injuries to the lower extremities, including bone fracture, ligament tear, and muscle rupture. While these injuries may seem well-defined through medical imaging, the process of injury and the effects of vehicle system design to protection are still unclear. In this paper, efforts focused on developing a finite element model ...

electrospinning was applied to nitrocellulose (nc) solutions  in dmf, dmso  and  ethyl  methyl  keton  to  obtain  nc  nanofibers. electrospraying  process  was  observed  when  dmf  was  used  as solvent.  in  comparison  to nc/dmf, nc/dmso  solution  resulted  in the  formation  of  a  coating  film  as  indicate  by  sem.  two  different electrospun  nanofibers,  smooth  nanofibers  with  90...

In the current research the maximum deflection of circular plates made of AA5010 and AA1100 alloys under blast load was investigated. Shock waves were produced by exploding a spherical charge in different distances from the center of plates. The ABAQUS software uses conwep equation for blast loading analysis. It was found the results of these simulations have about 30% to 40% inaccuracy in comp...

This paper presents a novel experimental methodology for the study of dynamic deformation of structures under underwater impulsive loading. The experimental setup simulates fluid–structure interactions (FSI) encountered in various applications of interest. To generate impulsive loading similar to blast, a specially designed flyer plate impact experiment was designed and implemented. The design ...