Download e-book for iPad: Advanced Fibrous Composite Materials for Ballistic by Xiaogang Chen

By Xiaogang Chen

ISBN-10: 178242461X

ISBN-13: 9781782424611

ISBN-10: 1782424849

ISBN-13: 9781782424840

ISBN-10: 1845692063

ISBN-13: 9781845692063

ISBN-10: 1845696999

ISBN-13: 9781845696993

ISBN-10: 1855739410

ISBN-13: 9781855739413

Advanced Fibrous Composite fabrics for Ballistic Protection offers the newest details on ballistic safeguard, an issue that is still an immense factor nowa days as a result of ever expanding threats coming from neighborhood conflicts, terrorism, and anti-social habit.

The uncomplicated standards for ballistic safety gear are initially, the prevention of a projectile from perforating, the aid of blunt trauma to the human physique attributable to ballistic impression, the need that they're thermal and supply moisture convenience, and they are light-weight and versatile to assure wearer’s mobility.

The major goal of this e-book is to give essentially the most contemporary advancements within the layout and engineering of woven materials and their use as layering fabrics to shape composite constructions for ballistic own safety. bankruptcy themes comprise excessive functionality Ballistic Fibres, Ultra-High Molecular Weight Polyethylene (UHMWPE), Ballistic harm of Hybrid Composite fabrics, research of Ballistic materials and Layered Composite fabrics, and Multi-Scale Modeling of Polymeric Composite fabrics for Ballistic Protection.

  • Contributions from prime specialists within the field
  • Cutting area advancements at the engineering of ballistic materials
  • Comprehensive research of the advance and makes use of of complicated fibrous composite materials

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Additional resources for Advanced Fibrous Composite Materials for Ballistic Protection

Sample text

As before, the hot drawing process helps to further develop its strength and give it its high properties. The fibre has moderate crystallinity with a random distribution of amorphous regions through its fine structure with its high strength and modulus attributed to its extended chain structure. Ozawa [16] provides more details regarding the effect of draw ratio and the associated mechanism in the case of aramid copolymers processing. He refers to three modes of drawing. An ordinary draw mechanism would prevail in the case of low draw ratio, below two for Technora®, which is characterised by improved crystal size and uniformity and better orientation of the chains.

2 21 Spinning of fibres Production of fibres initially involves heating the spinning solution up to a suitable processing temperature, which is of the order of 80 C for the highly concentrated solutions in 100% (water-free) [87a] sulphuric acid. At this temperature above a polymer concentration of about 10 wt%, the solution state corresponds to a nematic liquid crystalline phase. The concentration limit for the polymer in spinning solution is 20 wt%. If concentrations above this critical limit are used, spinnability is affected due to undissolved material; therefore the resulting fibre has inferior mechanical properties.

9 Schematic representation of the microstructure of (a) semicrystalline polymers such as nylon-6 and (b) poly-p-phenylene terephthalamide. Fibre axis is vertical. The supermolecular structure of a high-modulus polyaromatic material such as Kevlar® 49 has been reported by Dobb et al. [69]. In this work a combination of electron diffraction and electron microscope dark field image techniques were utilised. Detailed analysis conducted by the authors led to the assignment that there was a uniform distribution of ordered crystalline material throughout the fibre and that the dark field banding observed was a manifestation of changes in crystalline orientation and not of crystalline order.

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Advanced Fibrous Composite Materials for Ballistic Protection by Xiaogang Chen


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