Sunday, April 5, 2015

with new Intelligent fluid your body becomes «against bullets» - بسائل ذكي جديد يصبح «جسمك ضد الرصاص»

«جسدك ضد الرصاص»

ابتكر فريق من الباحثين البولنديين، مادة سائلة وصفوها بـ "السحرية"، قادرة على وقف الرصاص ومنعه من اختراق الجسد، إذ تتصلب هذه المادة فتمنع نفاد الطلقات النارية.


أطلق الباحثون بمعهد "موراتيكس" البولندي، على هذه المادة السائلة اسم "Shear- Thickening Fluid" أو المعروفة اختصارًا بـ"S T F"، وهي مادة سائلة شفافة تشبه الماء لكنها لزجة تتحول إلى مادة صلبة خلال أجزاء من الثانية.


ويهدف الباحثون من هذه المادة تزويد الجنود بسترات واقية مدرعة قادرة على التصدي للمقذوفات بسرعة 450 مترا في الثانية أو أعلى قليلًا، كما يمكن الاستفادة منها أيضًا في مجالات أخرى مثل إدراجها في مصدات السيارات أو حواجز خرسانية واقية.


وأشار الباحثون، إلى أن هذه المادة السائلة السحرية تمنح أعلى مستويات الأمان لمرتديها، مقارنة بتلك المواد التقليدية المستخدمة حاليًا مثل "كيفلر" .


Liquid body armour: 'Magic material' can instantly harden on impact - and is tough enough to stop a bullet

Clothing can include Moratex pack which instantly hardens on impact


Has been shown to stop bullets in lab tests - yet wearer can move around

Scientists at a Polish company that produce body armour systems are working to put a 'magic liquid' that can harden on impact in their products.


The liquid is called Shear-Thickening Fluid (STF), and instantly hardens upon impact at any temperature.

In a 'liquid armour' this provides protection from penetration by high-speed projectiles and additionally dispersing energy over a larger area.

  

The new material in its liquid form (left)
 and the solid form it take on impact (right)

HOW IT WORKS 

The liquid is called Shear-Thickening Fluid (STF), and  does not conform to the model of Newtonian liquids, such as water, in which the force required to move the fluid faster must increase exponentially, and its resistance to flow changes according to temperature.


Instead STF hardens upon impact at any temperature, providing protection from penetration by high-speed projectiles and additionally dispersing energy over a larger area.

'This viscosity increases thanks to the subordination of the particles in the liquid structure, therefore they form a barrier against an external penetrating factor,' said Karolina Olszewska, who performed tests on the STF for Moratex.


The exact composition of the STF is known only to Moratex and its inventors at the Military Institute of Armament Technology in Warsaw, but ballistic tests proved its resistance to a wide range of projectiles.


'We needed to find, design a liquid that functions both with projectiles hitting at the velocity of 450 meters per second and higher. 

'We have succeeded,' said Deputy Director for Research at the Moratex institute, Marcin Struszczyk.


Struszczyk said the liquid's stopping capability, combined with the lower indentation of its surface, provides a higher safety level for the user compared with traditional, mostly Kevlar-based, solutions.


'If a protective vest is fitted to the body, then a four centimeter deep deflection may cause injury to the sternum, sternum fracture, myocardial infarction, lethal damage to the spleen,' Struszczyk said.


'Thanks to the properties of the liquid, thanks to the proper formation of the insert, we eliminate one hundred percent of this threat because we have reduced the deflection from four centimeters to one centimeter.' 

The liquid has been used to create lightweight flexible sheets, which can be placed inside the body armour

The liquid has been used to create lightweight flexible sheets, which can be placed inside the body armour


The 'magic liquid' that can stop a bullet in its tracks

When hit by a high-speed projectile, a wide area of the STF hardens instantly, causing the usually massive energy to be dispersed away from the wearer's internal organs.


Implementing the solution in body armor required designing special inserts, but the company says those are lighter than standard ballistic inserts and broader range of movement for their users in the police and military.


'The point is for them not to interfere, not change the way of movement, operation of such the product by the user, and at the same time increase their motor skills, increase effectiveness of their decision process and increase their possibilities during the mission at hand,' Struszczyk said.

A Bullet test shows the material hardening on impact.

A Bullet test shows the material hardening on impact.

Researchers have already tested the material in existing body armour designs.

Researchers have already tested the material in existing body armour designs.

The laboratory is also working on a magnetorheological fluid, which they hope can be also applied in their products.


According to the researchers, both liquids can find applications beyond body armor, such as in the production of professional sports inserts, and even entire outfits. Another use could be in car bumpers or road protective barriers.