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An experimental investigation of the...

Cepus, Elvis.

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An experimental investigation of the early dynamic impact behaviour of textile armour systems: Decoupling material from system response.

Record Type:	Electronic resources : Monograph/item
Title/Author:	An experimental investigation of the early dynamic impact behaviour of textile armour systems: Decoupling material from system response./
Author:	Cepus, Elvis.
Description:	174 p.
Notes:	Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2343.
Contained By:	Dissertation Abstracts International64-05B.
Subject:	Engineering, Materials Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ79207
ISBN:	0612792072

An experimental investigation of the early dynamic impact behaviour of textile armour systems: Decoupling material from system response.
Cepus, Elvis.

An experimental investigation of the early dynamic impact behaviour of textile armour systems: Decoupling material from system response. - 174 p.

Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2343.

Thesis (Ph.D.)--The University of British Columbia (Canada), 2003.

This work focuses on the early impact response of textile armour systems. A relatively new data acquisition system, the Enhanced Laser Velocity Sensor (ELVS), was refined and used to generate a large database of results for a 5.57 mm diameter, 3 gram, non-deforming projectile impacting single-ply configurations of Ballistic Nylon, two weaves of Kevlar 129, and Zylon (PBO) over a range of velocities from 61 m/s to 248 m/s. In addition, one Kevlar 129 material was tested in configurations of 2, 3, 4, 8 and 16 plies over a range of strike velocities from 90 m/s to 481 m/s. ELVS results consisted of high-resolution timehistories of displacement, velocity and energy for each system tested. The strain wave velocity and ballistic performance of each system was also determined.

ISBN: 0612792072Subjects--Topical Terms:

1017759
Engineering, Materials Science.

An experimental investigation of the early dynamic impact behaviour of textile armour systems: Decoupling material from system response.
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100 1 $a Cepus, Elvis. $3 1952328
245 1 3 $a An experimental investigation of the early dynamic impact behaviour of textile armour systems: Decoupling material from system response.
300 $a 174 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2343.
500 $a Adviser: Anoush Poursartip.
502 $a Thesis (Ph.D.)--The University of British Columbia (Canada), 2003.
520 $a This work focuses on the early impact response of textile armour systems. A relatively new data acquisition system, the Enhanced Laser Velocity Sensor (ELVS), was refined and used to generate a large database of results for a 5.57 mm diameter, 3 gram, non-deforming projectile impacting single-ply configurations of Ballistic Nylon, two weaves of Kevlar 129, and Zylon (PBO) over a range of velocities from 61 m/s to 248 m/s. In addition, one Kevlar 129 material was tested in configurations of 2, 3, 4, 8 and 16 plies over a range of strike velocities from 90 m/s to 481 m/s. ELVS results consisted of high-resolution timehistories of displacement, velocity and energy for each system tested. The strain wave velocity and ballistic performance of each system was also determined.
520 $a Results taken from during the impact event were analysed up to just prior to the strain-wave rebounding from the boundary and returning to the impact point---effectively removing boundary influences. Regardless of system type, a constant rate of energy absorption within the pre-rebound timeframe was found to exist, which scales with the strike velocity to approximately the 8/3-power.
520 $a Well-established single fibre theory was modified and applied to woven materials.{09}It was assumed that three primary energy absorption mechanisms exist; elastic strain, in-plane kinetic and out-of-plane kinetic. This simple model yields the experimentally observed 8/3 exponent and parametrically predicts the difference between the different single-ply material systems, but underpredicts the observed behaviour by a factor of 2 and cannot address the performance reduction with increasing ply count.
520 $a This combined experimental and analytical work confirms the long-held assumption that single fibre wave physics is applicable to multi-ply woven systems. More significantly, for the first time, it decouples material response from overall system response and provides the experimental tools and methodology required to analyse textile armour systems in a scientific manner.
590 $a School code: 2500.
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Textile Technology. $3 1020710
690 $a 0794
690 $a 0994
710 2 0 $a The University of British Columbia (Canada). $3 626643
773 0 $t Dissertation Abstracts International $g 64-05B.
790 1 0 $a Poursartip, Anoush, $e advisor
790 $a 2500
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ79207