Armor Testing: Blunt Force Trauma

Published on November 1, 2019
Duration: 21:59

This video provides an expert-level analysis of blunt force trauma mitigation in body armor, featuring collaboration between InRangeTV, Primary & Secondary, and Survival Armor. The testing utilizes NIJ-standard clay to measure backface signatures from various armor plates, including the AR1000 steel and a Ceramic Poly-Hybrid, against common rifle threats like 7.62 NATO M80 Ball. The results highlight the superior blunt force mitigation of steel plates and the effectiveness of ceramic plates when paired with soft armor backers for reduced weight and enhanced protection.

Quick Summary

Body armor blunt force trauma is assessed via backface signature, measured by the depth of deformation on the rear of the armor using clay. Steel plates generally excel in minimizing this signature, while ceramic plates show greater potential for blunt force trauma when used standalone, though this is significantly mitigated when paired with a soft armor backer. NIJ standards permit up to 44mm of backface signature.

Chapters

  1. 00:00Introduction and Collaboration
  2. 00:35Testing Medium and NIJ Standards
  3. 01:44Test Methodology
  4. 02:32Armor Plate Specifications
  5. 04:27Ballistic Context and FBI Stats
  6. 06:51Test 1: Steel Plate vs. 7.62 NATO
  7. 09:50Test 2: Standalone Ceramic Plate
  8. 11:59Test 3: Ceramic Plate with Soft Armor Backer
  9. 14:47Final Analysis and Conclusions

Frequently Asked Questions

How is blunt force trauma measured in body armor testing?

Blunt force trauma is measured by the backface signature, which is the depth of deformation on the back of the armor after impact. This is typically assessed using a standardized medium like Roma Plastilina No. 1 clay, as seen in this test, with digital calipers measuring the crater's depth.

What is the difference in blunt force trauma mitigation between steel and ceramic body armor?

Steel plates, like the AR1000 tested, generally offer superior blunt force trauma mitigation with minimal backface signature. Ceramic plates, especially when used standalone, can produce larger deformations, but this is significantly reduced when paired with a soft armor backer.

What are the NIJ standards for backface signature in body armor?

The National Institute of Justice (NIJ) standards allow for a maximum backface signature of 44mm. This measurement is crucial for determining the potential for blunt force trauma to the wearer.

Why is backface signature important for body armor?

Backface signature is critical because it directly correlates to the potential for blunt force trauma. A large backface signature indicates significant energy transfer to the wearer's body, which can cause severe internal injuries even if the armor stops the projectile.

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