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NCJRS Abstract

The document referenced below is part of the NCJRS Library collection. To conduct further searches of the collection, visit the NCJRS Abstracts Database. See the Obtain Documents page for direction on how to access resources online, via mail, through interlibrary loans, or in a local library.

 
  NCJ Number: NCJ 234315     Find in a Library
  Title: Role of Folding in the Degradation of Ballistic Fibers
  Document URL: PDF 
  Agency Summary: Agency Summary 
  Author(s): Gale A. Holmes ; Jae-Hyun Kim ; Derek L. Ho ; Walter G. McDonough
  Corporate Author: National Institute of Standards and Technology (NIST)
United States of America
  Date Published: 08/2010
  Page Count: 8
  Annotation: This report examines the failures of soft body armor.
  Abstract: Failures of certified soft body armor led to a call to understand the underlying mechanisms of the failure. Research has indicated that the folding of ballistic fibers comprising the soft body armor may be a factor in the performance deterioration that has been observed. To quantify the impact of this mechanism, an apparatus was designed and built to simulate the folding that may occur to the ballistic fibers while the vest is in use. This device systematically folds woven fabric and yarns of ballistic fibers to assess the impact of folding on ballistic fiber properties. After cycling a piece of woven poly(benzoxazole) (PBO) fabric for 80,000 cycles, a 41 percent reduction in the ultimate tensile strength and strain to failure of the PBO fibers was observed. These results were also reflected in data obtained from small angle X-ray scattering where the long range order of the fiber structure is changed by the folding process. Preliminary failure analysis using scanning electron microscopy on tested fibers also revealed changes in failure morphology. (Published Abstract)
  Main Term(s): Body armor/Personal protective equipment
  Index Term(s): Testing and measurement ; Ballistics ; Analysis ; Protective equipment ; Failure factors ; NIJ grant-related documents
  Sponsoring Agency: National Institute of Justice (NIJ)
US Department of Justice
Office of Justice Programs
United States of America
  Sale Source: National Institute of Standards and Technology (NIST)
100 Bureau Drive
Gaithersburg, MD 20899-3460
United States of America

NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America
  Type: Research (Applied/Empirical)
  Country: United States of America
  Language: English
   
  To cite this abstract, use the following link:
https://www.ncjrs.gov/App/Publications/abstract.aspx?ID=256270

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