Abstract 3D fabric preforms are used as reinforcements in composite applications. woven have a huge demand ballistic applications, aircraft industry, automobiles and structural reinforcements. A variety of reinforced composites two dimensional laminates can be found the literature. However, majority said products lack delamination resistance possess poor out-of-plane mechanical characteristics,...

A ballistic impact test program was conducted to provide validation data for the development of numerical models of blade out events in fabric containment systems. The impact response of two different fiber materials Kevlar 49 (E.I. DuPont Nemours and Company) and Zylon AS (Toyobo Co., Ltd.) was studied by firing metal projectiles into dry woven fabric specimens using a gas gun. The shape, mass...

Hybridization is an important application in obtaining the multi-functionality to combine best properties of each reinforcing element makes up composite. In this study, hybrid composites and uniform were fabricated using carbon, aramid, intraply carbon/aramid weaves with two different production methods (vacuum-assisted resin transfer molding process vacuum bagging process). The mechanical prod...

The current body armor systems manufactured using ballistic fibers are not performing as theoretical results predict and are causing injuries. The actual maximum projectile penetration speed that the body armor can endure is significantly lower than the theoretical maximum speed, thus causing a costly build-test relationship that is not aided with modeling design efforts. The main aim of this r...

A new multiwire proportional chamber (MWPC) was designed and constructed for precision studies of neutron b decay angular correlations. Its design has several novel features, including the use of low pressure neopentane as the MWPC gas and an entrance window made of thin Mylar sheet reinforced with Kevlar fibers. In the initial off-line performance tests, the gas gain of neopentane and the posi...

INTRODUCTION Composites have become an important group of engineering materials, as they offer better physical and mechanical properties in comparison to unreinforced materials. Different types of materials can be used as the matrix of composites, including metals, polymers and ceramics. An important aspect of researches on composites has been the investigation of their mechanical properties [1...

A lightweight energy-absorbing keel-beam concept was developed and retrofitted in a general aviation type aircraft to improve crashworthiness performance. The energy-absorbing beam consisted of a foam-filled cellular structure with glass fiber and hybrid glass/kevlar cell walls. Design, analysis, fabrication and testing of the keel beams prior to installation and subsequent fullscale crash test...

A new multiwire proportional chamber was designed and constructed for precision studies of neutron β decay angular correlations. Its design has several novel features, including the use of low pressure neopentane as the MWPC gas and an entrance window made of thin Mylar sheet reinforced with Kevlar fibers. In the initial offline performance tests, the gas gain of neopentane and the position res...