Next Article in Journal
Fourier-Transform Imaging of Cotton and Botanical and Field Trash Mixtures
Previous Article in Journal
Experimental and Analytical Modeling of GFRP Strengthened Grouted Mortarless Masonry Prisms
Previous Article in Special Issue
Verification and Validation of a Three-Dimensional Orthotropic Plasticity Constitutive Model Using a Unidirectional Composite
Article Menu

Export Article

Open AccessArticle
Fibers 2017, 5(2), 17; doi:10.3390/fib5020017

Exploration of Wave Development during Yarn Transverse Impact

1
School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN 47907, USA
2
Indiana University School of Medicine, Indiana University, Indianapolis, IN 46202, USA
3
Program Executive Office – Soldier, US Army, Fort Belvoir, VA 22060, USA
4
School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA
Current address: Currently with Sandia National Laboratories, Albuquerque, NM 87123, USA.
*
Author to whom correspondence should be addressed.
Academic Editor: John W. Gillespie
Received: 5 December 2016 / Revised: 28 February 2017 / Accepted: 24 April 2017 / Published: 16 May 2017
(This article belongs to the Special Issue Polymer Fibers)

Abstract

Single yarns have been impacted in a transverse fashion so as to probe the characteristics of resulting wave development. Longitudinal wave speeds were tracked in efforts to directly measure the yarn tensile stiffness, resulting in a slight increase in the modulus of Kevlar® KM2 and Dyneema® SK76. Additionally, the load developed in AuTx® and Kevlar® KM2 yarns behind the longitudinal wave front has been recorded, providing additional verification for the Smith relations. Further effort to bolster the Smith equations has been successfully performed via tracking transverse wave speeds in AuTx® yarns over a range of impacting velocities. Additional emphasis has been placed at understanding the transverse wave development around the yarn critical velocity, demonstrating that there is a velocity zone where partial yarn failure is detected. Above the critical velocity, measurement of early time transverse wave speeds also agrees with the Smith solution, though the wave speed quickly reduces in value due to the drop in tensile stresses resulting from filament rupture. Finally, the Smith equations have been simplified and are compared to the Cunniff equation, which bear a striking resemblance. Due to such a resemblance, it is suggested that yarn critical velocity experiments can be performed on trial yarn material, and the effect of modifying yarn mechanical properties is discussed. View Full-Text
Keywords: Kevlar®; Dyneema®; transverse impact; projectile; wave speed; Cunniff velocity; critical velocity Kevlar®; Dyneema®; transverse impact; projectile; wave speed; Cunniff velocity; critical velocity
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Hudspeth, M.; Jewell, E.; Horner, S.; Zheng, J.; Chen, W. Exploration of Wave Development during Yarn Transverse Impact. Fibers 2017, 5, 17.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Fibers EISSN 2079-6439 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top