Nitinol armor. US6581522B1 - Projectile - Google Patents

Body armor according to claim 1 wherein the projectile-resistant outer layer comprises Kevlar. Some exemplary superelastic products which use superelastic alloys are antennas, eyeglass frames and biomedical stents. Ammunition of this type will enable deer hunters to shoot without regard to intervening branches and brush and should greatly improve the percentage of quick kills and reduce the percentage of non-critical wounds that require hunters to spend many hours tracking wounded deer. After melting and flowing into place, the core material would be allowed to solidify in place. Metals and polymers differ, however, in that polymers are commonly viscoelastic and show hysteretic elastic effects. The invention and its many attendant objects and advantages will become better understood upon reading the description of the preferred embodiment in conjunction with the following drawings, wherein:. The limitations of known shotgun slugs are well known, including poor and inconsistent ballistic performance, low muzzle velocity, extremely short range, and wretched accuracy.

 

Armor provides necessary protection for soldiers and it increases operational capability in environments where hostile fire is likely.One solution to this problem puts the back face of the ceramic strike plate in residual compression in order to increase the amount of load that the strike plate can withstand before failure begins.

 

The Nitinol material is proposed as a surface material or coating for reinforcement or organic fiber fabrics and/or composites or aramid and UHMW polyethylene.The extreme hardness of the point 62 and the inertia of the slug 66 behind it will open a further path through the armor which the body 60 can follow and open further.

 

Fully work-hardened Nitinol has a decent ,psi (MPa) tensile strength. That's not bad - better than any titanium alloy, and up there with common high.Conventional armor piercing ammunition has an embedded steel dart in the center of the bullet that continues forward after the jacket and lead around the dart have been stopped and dissipated against the armor.

 

cumperi.online › publication › _Shape_memory_alloy_r.Shape memory metals e.

 

and pre stressed super elastic nitinol shape memory alloy wire mesh were the ballistic limit of the armor material if any high energy.A Nitinol shotgun slug for a smooth bore shotgun can be configured as shown in FIG.

 

The astonishing ability of the Nitinol bullet to remain intact on impact with even the strongest, thickest armor makes it a fearsome weapon because of its.This bullet, like the solid and slit nose Nitinol bullet, is permitted under the rules of warfare even though it is substantially more lethal than other forms of ordnance which are outlawed under those rules.

 

A ballistic armor uses shape memory alloys and novel joining techniques The invention utilizes shape memory alloys, also known as SMA, such as nitinol.The melting temperature of the Nitinol shell is much higher than most core materials, so the shell will be unaffected by the molten material in its hollow interior.

 

Nitinol has large strain to failure, at 8% strain recovery. A woven fiber made of Nitinol is effective at absorbing the impact load by.Nitinol has a hysteresis stress strain curve similar to that of polymers.

 

Titanium can take single hits from high-caliber bullets, but it shatters and becomes penetrable with multiple hits from military-grade, armor piercing.Body armor according to claim 9 wherein the superelastic three dimensional construct comprises superelastic spacer fabric.

 

The tail fin stabilizes the flight of the projectile and tends to correct any deviation of the longitudinal axis of the projectile from the line of flight.

 

The pressure on the surface of the test specimen at a predefined loading is multiplied by the volume of the test specimen under no load.

 

The SMA allows a high amount of strain to be recovered through the low temperature heat treatment.

 

Type 55 Nitinol is

 

According to the Schwartz mild steel sheet penetration model, a 9mm 89gr.

 

Kink resistance is an important feature of Nitinol for spacer fabrics when being produced on the double bar knitting machines to produce spacer fabrics.

 

The smooth, low friction interface between the artillery projectile and the gun barrel reduces the amount of wear that the bore experiences with the use of conventional projectiles which use copper bands to seal the projectile in the bore and ride the rifling ridges.

 

It is to be noted, however, that the drawings illustrate only some embodiments of the invention and therefore are not to be considered limiting of its scope as the invention may admit to other equally effective embodiments.

 

Effective date :

 

Superelastic alloys belong to the larger family of shape memory alloys.

 

forum? However, we have found that most applications of nitinol perform better with a ternary alloy than they do with standard binary.

 

Partially dividing projectile or dividing projectile with a pb-free core interspersed with predetermined braking point.

 

One embodiment of a system, method, and apparatus for forming ballistic armor from dissimilar materials is disclosed.

 

Chemistry: The samples prepared in this experiment were strictly binary NiTi.

 

While contemporary body armor is relatively effective at preventing projectile penetration, substantial improvements are needed to appropriately address energy absorption and dissipation so as to reduce Behind Armor Blunt Trauma BABT.

 

The caseless ammunition itself includes a cylindrical case made of Type 55 Nitinol.

 

Still another object of this invention to provide an improved bullet for firearm ammunition that has a much higher muzzle velocity than conventional bullets, and a flatter trajectory over all but the longest ranges, resulting in much improved accuracy.

 

There are a lot of factors to consider — including bullet construction, angle of impact, and so on.

 

However, virtually any centerfire rifle will penetrate a brick wall.

 

The use of Nitinol in a projectile in accordance with this invention allows the use of special aerodynamic shapes that are not possible with conventional projectile materials such as lead and copper, etc.

 

Another Nitinol slug for a smooth bore shotgun is shown in FIG.

 

The sonic velocity, in turn, is related to the fiber's elastic modulus, as shown in Eq.

 

This woven structure can also be woven with one or more other known aramid fibers or projectile protection type fibers.

 

Woven fiber mats mitigate projectile energy in different ways.

 

Body armor according to claim 9 wherein the superelastic three dimensional construct comprises a 3D weave.

 

Current U.Forum Nitinol armor

 

The foregoing and other objects and advantages of the present invention will be apparent to those skilled in the art, in view of the following detailed description of the present invention, taken in conjunction with the appended claims and the accompanying drawings.

 

Law Students.

 

Nitinol can be woven in the cold worked condition, superelastic condition or the martensitic condition or a combination thereof.

 

What gauge steel will stop a bullet?

 

Kevlar 29 2.Forum Nitinol armor

 

The resulting nick or dent on the nose of the bullet often adversely affects the ballistic coefficient of the bullet.

 

Upon cooling, the metal shrinks more than the ceramic but is constrained by the bond between them so that the ceramic receives residual compressive stresses at its interfacing surface with the metal.

 

According to the Schwartz mild steel sheet penetration model, a 9mm 89gr.

 

In the prior art, there are numerous types of ballistic armor used to defend targets.