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|Author(s):||Haruki Kobayashi; Walter G. McDonough; Alexander J. Shapiro; Jae Hyun Kim; Stefan D. Leigh; Amanda L. Forster; Kirk D. Rice; Gale A. Holmes;|
|Title:||High Speed Fiber Testing: The Single Fold Test|
|Published:||May 20, 2010|
|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:||SAMPE 2010 Annual Technical Conference|
|Dates:||May 17-20, 2010|
|Keywords:||ballistic fiber, PPT, single fiber test|
|Research Areas:||Polymers, Ballistics|
|PDF version:||Click here to retrieve PDF version of paper (2MB)|