...Bo Song; Hwun Park; Wei-Yang Lu; Weinong Chen Transverse impact response of a linear elastic Kevlar ® KM2 fiber yarn was determined at various striking speeds from Hopkinson bar and gas gun experiments incorporated with high-speed photography techniques. Upon transverse impact, a triangle shape...

...James D. Walker; Sidney Chocron Fabrics are an extremely important element of body armors and other armors. Understanding fabrics requires understanding how yarns deform. Classical theory has shown very good agreement with the deformation of a single yarn when impacted transversely. However...

...Sidney Chocron; Trenton Kirchdoerfer; Nikki King; Christopher J. Freitas Ballistic tests were performed on single-yarn, single-layer and ten-layer targets of Kevlar ® KM2 (600 and 850 denier), Dyneema ® SK-65 and PBO ® (500 denier). The objective was to develop data for validation of numerical...

...J. H. Kim; N. Brandenburg; W. McDonough; W. Blair; G. A. Holmes A device was designed and built that attaches to servohydraulic machines that typically perform material fatigue testing. The device was designed to systematically fold woven fabric and yarns of ballistic fibers to assess the impact...

... concentration in the first intact yarn at the slit tip is determined as a function of increasing loading, and predictions for the onset of tearing are made under the assumption that tearing initiates through the rupture of the first intact yarn at a characteristic yarn breaking load. Extensive onset of tearing...