Strain rate and gage length effects on tensile behavior of Kevlar 49 single yarn

D. Zhu, Barzin Mobasher, J. Erni, S. Bansal, Subramaniam Rajan

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

In the present paper, Kevlar® 49 single yarns with different gage lengths were tested under both quasi-static loading at a strain rate of 4.2 × 10 -4 s -1 using a MTS load frame and dynamic tensile loading over a strain rate range of 20-100 s -1 using a servo-hydraulic high-rate testing system. The experimental results showed that the material mechanical properties are dependent on gage length and strain rate. Young's modulus, tensile strength, maximum strain and toughness increase with increasing strain rate under dynamic loading; however the tensile strength decreases with increasing gage length under quasi-static loading. Weibull statistics were used to quantify the degree of variability in yarn strength at different gage lengths and strain rates. This data was then used to build an analytical model simulating the stress-strain response of single yarn under dynamic loading. The model predictions agree reasonably well with the experimental data.

Original languageEnglish (US)
Pages (from-to)2021-2029
Number of pages9
JournalComposites Part A: Applied Science and Manufacturing
Volume43
Issue number11
DOIs
StatePublished - Nov 2012

Fingerprint

Strain gages
Yarn
Strain rate
Gages
Tensile strength
Toughness
Analytical models
Elastic moduli
Hydraulics
Kevlar 49
Statistics
Mechanical properties
Testing

Keywords

  • A. Yarn
  • B. Mechanical properties
  • C. Statistical properties/methods
  • D. Mechanical testing

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials

Cite this

Strain rate and gage length effects on tensile behavior of Kevlar 49 single yarn. / Zhu, D.; Mobasher, Barzin; Erni, J.; Bansal, S.; Rajan, Subramaniam.

In: Composites Part A: Applied Science and Manufacturing, Vol. 43, No. 11, 11.2012, p. 2021-2029.

Research output: Contribution to journalArticle

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