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Multi-hit Performance of Small Arms Protective Armor

Award Information
Agency: Department of Defense
Branch: Army
Contract: W911NF-21-C-0055
Agency Tracking Number: A2-8801
Amount: $1,149,330.00
Phase: Phase II
Program: STTR
Solicitation Topic Code: A14A-T017
Solicitation Number: 14.A
Solicitation Year: 2014
Award Year: 2021
Award Start Date (Proposal Award Date): 2021-09-30
Award End Date (Contract End Date): 2023-09-29
Small Business Information
1900 South Susan St
Santa Ana, CA 92704-1111
United States
DUNS: 968149257
HUBZone Owned: No
Woman Owned: Yes
Socially and Economically Disadvantaged: No
Principal Investigator
 Shane Bartus
 (205) 492-7264
Business Contact
 Corre Larkin
Phone: (714) 597-6499
Research Institution
 Southwest Research Institute
 Tim Holmquist
6220 Culebra Road
San Antonio, TX 78238-5166
United States

 (612) 460-4489
 Federally Funded R&D Center (FFRDC)

The weight tolerance and value of various US Army assets dictates the sophistication of the armor systems employed for their protection.  The Warfighter is the most weight sensitive and highest value of all assets and thereby utilizes the most advanced and expensive materials in their protection systems.  This effort provides a significant improvement in understanding the multi-hit behavior of advanced ceramic-based hard body armor and similar armor systems through careful implementation of ballistic experiments and the development of computational tools for prediction of multi-hit impacts in this type of armor system.  A standard methodology for deriving the constituent constants for the Johnson-Holmquist-Beissel (JHB) Material Model was devised and demonstrated on Pressure Assisted Densification boron carbide (PAD B4C) ceramic.  Statistical fractographic analysis was also carried out on micro-CT scans of ballistically interrogated ceramic.  The damage was then compared with the computationally derived prediction and the energy absorption of the conditioned targets.  This enables correlation between the damaged area and the degradation of ballistic capability as a result of the associated damage.  This white paper details the results from Phase I and Phase II and the plan for the Sequential Phase II (SP2) proposal that will outline the path to complete predictive computations into advanced body armor, aircraft armor, spall liners, C-kits, and other advanced armor systems. The focus for the SP2 will be on predictive capability with the other predominate material that constitutes advanced aircraft and body armor systems, Ultra High Molecular Weight Polyethylene (UHMWPE).  The goal will be to complete an end-to-end modeling process where armor designers, engineers and scientists can: Predict armor performance of a first impact on an advanced armor component Predict armor performance of multiple impacts at a specified distance from the first impact (within the damage interaction zone) Quantify the degradation in ballistic efficiency of brittle armors systems (ceramic armor or transparent armor) using statistical fractographic analysis of damaged regions.

* Information listed above is at the time of submission. *

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