There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

Investigation of failure modes and influence on ballistic performance of Ultra-High Molecular Weight Polyethylene (UHMWPE) uni-directional laminate for hybrid design

https://www.research.manchester.ac.uk/portal/files/50244711/1_s2_0_S026382231632030X_main.pdf

Investigation on energy absorption efficiency of each layer in ballistic armour panel for applications in hybrid design

This study investigated the effect of graphene nanoplatelets (GnPs) on the ballistic performance of Kevlar/Cocos nucifera sheath-reinforced epoxy composites. GnPs with different wt. % (0%, 0.25%, 0...

Effect of graphene nanoplatelets on the ballistic performance of hybrid Kevlar/Cocos nucifera sheath-reinforced epoxy composites:

This study aims to investigate ballistic resistant efficiency of individual layers in body armour panels in order to further understand the energy absorption and failure modes of the layers and the panel. Finite Element (FE) analysis, in conjunction of experimental methods, was used to quantify the ballistic responses of the individual layers under ballistic impact. Perforated and non-perforated ballistic tests and photographic morphology examination were employed in this study for layer and panel failure mechanisms. The results of the investigation revealed that the fabric layers at different positions in the panel exhibit different transverse deformation and stress distribution. In the perforated panel, energy absorption in each layer increases gradually from the front to the rear of the panel. Comparison with the stand-alone fabric layer revealed that the energy absorption efficiency of the front layers is lower than that of the rear for the perforated panels. Based on the failure modes of different fabric layers in a ballistic panel, it is possible that the construction of the panel be optimised for improved ballistic performance.

Study of energy absorption and failure modes of constituent layers in body armour panels

Body armor is a material to protect body from injury of various kind of high speed projectile impact velocity in combat or other dangerous situation. Researchers were found to actively research and exploring new body armor technology due to the invention of new firearms. Furthermore, they were also competing in developing ballistic panel which is lighter in weight, more flexible and comfort in use, cheaper in cost and manufacturability. This paper reviews the body armor commercial and current development materials, structure and construction techniques involved and related works on enhancing ballistic energy absorption.

M. Maziah

Papers

Body Armor Technology: A Review of Materials, Construction Techniques and Enhancement of Ballistic Energy Absorption