By Paul J. Hazell
Highlights fresh Advances in Materials/Armour Technology
As lengthy as clash exists on this planet, security applied sciences will continually be fashionable. Armour: fabrics, conception, and Design describes the present and rising safety applied sciences which are at present using the most recent advances in armour platforms. This publication explains the speculation, purposes, and fabric technology elements of recent armour layout as they're utilized in relation to automobiles, ships, group of workers, and structures, and explores the technological know-how and know-how used to supply security opposed to blasts and ballistic assaults. It covers fabrics applied sciences utilized in safeguard; addresses the method results of including blast-wave shaping to autos, in addition to the impact at the human physique; and descriptions ballistic checking out techniques.
Takes a glance at How Armour Works
The e-book discusses ceramics for armour functions; obvious armour; and metals for armour functions (including aluminium alloys, magnesium alloys, titanium alloys and steels); in addition to composite armour structures; explosive reactive armour structures near to protective reduction suites for automobiles; and wound ballistics. furthermore, the writer lists greater than a hundred references for complex examine and extra reading.
Armour: fabrics, conception, and Design
introduces various armour applied sciences, outlines smooth threats and hazards appropriate to safeguard know-how, and aids readers in enforcing protecting buildings that may be utilized in conflict, clash, army zones, and different similar environments.
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Additional resources for Armour Materials, Theory, and Design
This is a commonly used hardness metric that is quoted for armour-grade steels. 10 Top-view geometries of hardness indentations: (a) Vickers, (b) Knoop and (c) Brinell. 6 VHN Hardness and UTS Values of Some Typical Armour Materials Material Aluminium alloy 7039 (armour plate) RHA steel High-hardness armour (HHA) steel Alumina (ceramic) Silicon carbide (ceramic) VHN UTS (MPa) 130–150 270–350 500–550 1300–1800 1900–2800 450–480 900–1200 1600–1900 – – the Meyer hardness measurement instead of Brinell; this is simply calculated from the applied load divided by the projected surface area of the indenter.
In addition to slip, plastic deformation can also occur by the formation of mechanical twins or twinning. Twinning occurs in metals that have a BCC and HCP structure at low temperatures and at high rates of loading – such as you would expect when a bullet penetrates an armour material. Twinning is a process whereby a shear force results in atomic displacement. An important characteristic of twinning is that atomic displacement results in a perfectly symmetrical atomic arrangement about the twin plane.
3 You are designing a new type of crash box for low-velocity collisions, and you are given the option of four materials. 4. During the collision, you expected that the structure would remain elastic at all times. Which material would you choose and why? During a low-velocity elastic collision, we would want the structure to absorb as much kinetic energy as possible. Therefore, choosing a material that has high elastic resilience is sensible. 23, it is a relatively trivial task to work out the elastic resilience of our choices.