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High Speed Fiber Testing: The Single Fold Test

Published

Author(s)

Haruki Kobayashi, Walter G. McDonough, Alexander J. Shapiro, Jae H. Kim, Stefan D. Leigh, Amanda L. Forster, Kirk D. Rice, Gale A. Holmes

Abstract

The failure of a first responder s body armor has prompted research to assess the long-term durability and effectiveness of current and future soft body armor products. Prior work in this laboratory described a 10 % drop in tensile strength and 15 % drop-off in modulus in poly(p-phenylene benzobisoxazole) (PBO) fibers after they were subjected to a single fold for 24 h. In addition, regions of internal damage were seen in the folded fibers. Here, that work was continued by investigating the response of poly(p-phenylene terephthalamide) (PPT) fibers to the same condition. The results presented in this paper show no change in tensile strength, modulus, or failure strain in the PPT fibers and a different surface morphology in the folded region. Furthermore, results show a continued drop-off in the mechanical properties of PBO fibers that is possibly due to hydrolytic degradation.
Proceedings Title
SAMPE 2010 Annual Technical Conference
Conference Dates
May 17-20, 2010
Conference Location
Seattle, WA, US

Keywords

ballistic fiber, PPT, single fiber test

Citation

Kobayashi, H. , McDonough, W. , Shapiro, A. , Kim, J. , Leigh, S. , Forster, A. , Rice, K. and Holmes, G. (2010), High Speed Fiber Testing: The Single Fold Test, SAMPE 2010 Annual Technical Conference, Seattle, WA, US, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=904005 (Accessed April 20, 2024)
Created May 19, 2010, Updated October 12, 2021