Last edited by Mikajas
Thursday, July 30, 2020 | History

2 edition of comparison of the use of three different mounting fixtures for ballistic tests of body armor found in the catalog.

comparison of the use of three different mounting fixtures for ballistic tests of body armor

L. K Eliason

comparison of the use of three different mounting fixtures for ballistic tests of body armor

by L. K Eliason

  • 264 Want to read
  • 7 Currently reading

Published by The Institute in Washington, D.C .
Written in English

    Subjects:
  • Law enforcement -- Equipment and supplies -- Research -- United States,
  • Armor -- United States -- Testing,
  • Shields -- United States -- Testing

  • Edition Notes

    StatementLawrence K. Eliason and Daniel E. Frank ; prepared for National Institute of Justice
    SeriesNIJ report -- 100-91
    ContributionsFrank, Daniel E, National Institute of Justice (U.S.), National Institute of Standards and Technology (U.S.). Office of Law Enforcement Standards
    The Physical Object
    Paginationvi, 23 p. :
    Number of Pages23
    ID Numbers
    Open LibraryOL14995050M

    Ballistic Test Samples Below are a few samples of the types of materials we test at Close Focus Research.. Terminology: Threat Side - The projectile impact side that faces away from the occupants. Rear View - The side opposite to the threat side that faces towards the occupants (protection side).. To view some additional Ballistic Testing Project photos, see the following . Ballistic Charts UL and NIJ I-IV: Ratings of Bullet Resistant materials as identified by: UL ; Rating Ammunition Weight (grains) Weight (grams) min fps max fps Number armor piercing: +/- +/- 1: Ratings of Bullet Resistant materials as identified by: State Department SD-STD; Rating Ammunition.

      Typically, sets of such tests are standardized (eg, National Institute of Justice, Standard for body armor). The resistance to penetration upon ballistic impact is generally assessed by a V50 determination (the projectile impact velocity at which there is a probability of 50% for total target penetration) via prescribed protocols. We are no longer satisfied to know we must buy Winchester, not Weatherby, ammo to work in our rifle. We want to know why we should use Federal’s grain Barnes Tipped Triple Shock instead of Winchester’s grain Ballistic Silvertip instead of Remington’s grain AccuTip Boat Tail or Hornady’s grain Spire Point Interlock.

    Bullets produce tissue damage in three ways (Adams, ): Laceration and crushing - Tissue damage through laceration and crushing occurs along the path or "track" through the body that a projectile, or its fragments, may produce. The diameter of the crush injury in tissue is the diameter of the bullet or fragment, up to the long axis. The third is a light bullet with low ballistic efficiency and C equal to Remaining velocity and drop are shown for three muzzle velocities, , , and fps. First, let us compare the ballistic performance of these three bullets when all three are fired at .


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Comparison of the use of three different mounting fixtures for ballistic tests of body armor by L. K Eliason Download PDF EPUB FB2

Get this from a library. A comparison of the use of three different mounting fixtures for ballistic tests of body armor.

[L K Eliason; Daniel E Frank; National Institute of Justice (U.S.); National Institute of Standards and Technology (U.S.). Office of Law Enforcement Standards.].

A comparison of the use of three different mounting fixtures for ballistic tests of body armor / By L. Eliason, Daniel E. Frank, National Institute of Standards and Technology (U.S.). Office of Law Enforcement Standards. and National Institute of Justice (U.S.).

Types of Ballistic Tests. Ballistic testing can vary dramatically from one test to the next, depending on the needs of the individual contract. The best option is to find a ballistics testing facility that can offer a variety of different tests for body armor certification on demand, including: Threat tests for spheres, cubes, RCCs, FSPs, etc.

NIJ Ballistic Threat Level Chart for Body Armor, AR Armor. Check out more details on body armor levels, common threats, and a huge list of body armor at The Prepared. Now what do we recommend. Go with Level IIIA soft armor if you only think you’ll have handgun threats or if concealment is the priority/5().

Ensuring the ballistic resistive integrity of ArmorCore® bullet-resistant fiberglass panels is a critical aspect of our operation, and why we have developed state-of-the-art in-house testing facilities and procedures.

Within our Waco, Texas manufacturing facility, we routinely perform live round bullet-resistant tests on panels – both as part of our on-going new product development. However, the table below gives a reasonably accurate comparison of the basic ballistics of most popular rifle cartridges.

The velocity and energy figures in this table are taken from various sources including the Federal, Remington, Weatherby and Winchester ammunition guides and the 9th Edition of the book Cartridges of the World by Frank C.

Lights, Up-Armor, O2 Masks, NVGs, Communications systems, and much more are commonly found on any modern army helmet or police helmet. Most helmet companies have stuck to the dovetail rail design that allows for compatibility with most others. This includes 3M, OPS-CORE, Hard Head Veterans, Crye, and more.

Ballistic Resistance Test NIJ-STD Level III Performed July, 22nd Independent Lab Test performed by H.P. White - Click link to view documentation. Test Specifications: 6 rounds of x51 at feet from muzzle.

AR Armor 10" x 12" Flat Level III Body Armor. If investigators recover bullets from a crime scene, forensic examiners can test-fire a suspect’s gun, then compare the marks on the crime scene bullet to marks on the test-fired bullet.

The examiner will then assess how similar the two sets of marks are and determine if the bullets are likely to have been fired from the same gun or different. 3) Ballistic Coefficient Changes with Velocity for All Bullets It was mentioned above that an important result from the drag model comparison tests in was that the ballistic coefficient C 1 is not constant with velocity even for flat base bullet types.

We have found, in fact, that ballistic coefficient changes with velocity for almost. The backing material fixture is designed for executing of ballistic tests of resistance body armor against gunfire according NIJ Standard Ballistic Resistance of Body Armor.

The backing material holder is determinate for mounting of backing material fixture on target table. Backing Material Fixture. Lee and Yoo () conducted an analysis of a ceramic/metal armor system, in which the strain rate effect was considered and the ballistic limits for different ceramic/metal back plate ratios were derived.

Cheng et al. () performed experiments for the ballistic impact on a boron carbide plate, and they found that the loss of impact resistance of boron carbide is due to the.

Laboratory conducts label, P-BFS and BL tests, and conditions armor samples for P-BFS and BL testing. Non-conditioned armor submerged in water for 30 minutes followed by minute drying time. BL pass/fail criteria: no perforation at or below NIJ reference velocity.

Each panel impacted with six valid shots. Threat one requirement is 2 inches. Looking at getting a rifle in a different caliber, or looking at getting your first rifle.

The array and names of the cartridges can be confusing. Is a bigger than a 30 “ought six”. Is a 7mm bigger than a 9mm pistol. The makers of these different cartridges sure haven’t made it easy to compare them. The combat helmet test range at Aberdeen Test Center (ATC) is shown in Figures D-1a and D-1b.

The ATC firing range uses a rifle-like test barrel to fire a projectile against a helmet. Electronic instrumentation is used to measure projectile velocity before impact. Tested helmets are affixed to headforms that are packed with modeling clay, where the clay serves as a recording medium.

The Safariland Group manufactures and distributes law enforcement and security products including duty gear, holsters, body armor and tactical headsets. Heavy steel and plastic on your head and ballistic nylon/fiberglass plates that don’t stop bullets very well on your chest.

With the development of PASGT, a lightweight helmet concept was created. With a body armor garment, the materials, to be wearable over long periods, should be flexible, a few plated areas aside.

There are basically three types of ballistics, internal, external and terminal. Internal ballistics is the study of what happens within the barrel of a weapon from the moment the firing pin hits the primer to the time the bullets exits from the barrel. EnGarde Body Armor has developed a plate carrier system that is designed to offer users the dual benefits of ease of use and protection against rifle rounds.

Designed to accept standard byinch hard armor plates, the TRUST plate carrier offers users both front and rear protection. The plastic property of the clay allows it to record BFDs caused by impact of nonpenetrating projectiles during the ballistic testing of hard body armor. Helmet testing standards and practices are derived from body armor testing standards and practices and, as in body armor testing, are based on the use of RP #1 as the test recording medium.

US military standard MIL-STDF V50 Ballistic Test define a commonly used procedure for this measurement. The goal is to get three shots that penetrate that are slower than a second faster group of three shots that are stopped by the armor. These three high stops and three low penetrations can then be used to calculate a v50 velocity.withhold NIJ compliance status for body armor that meets the current requirements but is deemed by NIJ to pose a risk to officer safety.

NIJ also reserves the right to alter or modify existing test methods and/or requirements to address perceived weaknesses in varying designs of body armor submitted for inclusion on the NIJ Compliant Products List."Force Tests of Standard Hypervelocity Ballistic Models HB-l and to xbased on body diameter, and through an angle-of-attack range from -2 to 15 deg.

The effects of Mach number, Reynolds body on HB Three different size models were fabricated for each.