Experimental investigation on the tensile behavior of polyurea at high strain rates

Sudharshan Naidu Raman, T. Ngo, J. Lu, P. Mendis

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Elastomeric polymers, like polyurea, are finding relevance in strengthening applications and as energy absorbing materials for structures and systems subjected to impulsive loadings. Understanding the dynamic behavior of these materials is essential for their application as an effective protective and retrofitting material. This paper presents the findings of a series of uniaxial tensile tests that were conducted on polyurea over the strain rate region from 0.006 to 388s-1. The stress-strain behavior of the polyurea sample was established at different strain rates, and key mechanical properties of the material were determined. The results indicate that the stress-strain behavior of the material at high strain rates were considerably non-linear and exhibited significant rate dependency. The characteristics of the stress-strain curves at quasi-static and at higher strain rates can be described as rate-dependent linear elastic/piecewise linear strain hardening. Based on the findings of the experiments, the influence of strain rate effects on the modulus and yield stress of the polymer were analyzed and empirical correlations to describe the dynamic increase factor (DIF) of the modulus of elasticity and the yield stress at high strain rates were proposed.

Original languageEnglish
Pages (from-to)124-129
Number of pages6
JournalMaterials and Design
Volume50
DOIs
Publication statusPublished - 2013

Fingerprint

Strain rate
Yield stress
Polymers
Retrofitting
Stress-strain curves
Strain hardening
polyurea
Elastic moduli
Mechanical properties
Experiments

Keywords

  • Dynamic increase factor
  • Polyurea
  • Strain rate
  • Stress-strain behavior
  • Uniaxial tensile test

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Experimental investigation on the tensile behavior of polyurea at high strain rates. / Raman, Sudharshan Naidu; Ngo, T.; Lu, J.; Mendis, P.

In: Materials and Design, Vol. 50, 2013, p. 124-129.

Research output: Contribution to journalArticle

@article{3ef9be7a60ce45e0a14beaf7f57eed69,
title = "Experimental investigation on the tensile behavior of polyurea at high strain rates",
abstract = "Elastomeric polymers, like polyurea, are finding relevance in strengthening applications and as energy absorbing materials for structures and systems subjected to impulsive loadings. Understanding the dynamic behavior of these materials is essential for their application as an effective protective and retrofitting material. This paper presents the findings of a series of uniaxial tensile tests that were conducted on polyurea over the strain rate region from 0.006 to 388s-1. The stress-strain behavior of the polyurea sample was established at different strain rates, and key mechanical properties of the material were determined. The results indicate that the stress-strain behavior of the material at high strain rates were considerably non-linear and exhibited significant rate dependency. The characteristics of the stress-strain curves at quasi-static and at higher strain rates can be described as rate-dependent linear elastic/piecewise linear strain hardening. Based on the findings of the experiments, the influence of strain rate effects on the modulus and yield stress of the polymer were analyzed and empirical correlations to describe the dynamic increase factor (DIF) of the modulus of elasticity and the yield stress at high strain rates were proposed.",
keywords = "Dynamic increase factor, Polyurea, Strain rate, Stress-strain behavior, Uniaxial tensile test",
author = "Raman, {Sudharshan Naidu} and T. Ngo and J. Lu and P. Mendis",
year = "2013",
doi = "10.1016/j.matdes.2013.02.063",
language = "English",
volume = "50",
pages = "124--129",
journal = "Materials and Design",
issn = "0264-1275",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Experimental investigation on the tensile behavior of polyurea at high strain rates

AU - Raman, Sudharshan Naidu

AU - Ngo, T.

AU - Lu, J.

AU - Mendis, P.

PY - 2013

Y1 - 2013

N2 - Elastomeric polymers, like polyurea, are finding relevance in strengthening applications and as energy absorbing materials for structures and systems subjected to impulsive loadings. Understanding the dynamic behavior of these materials is essential for their application as an effective protective and retrofitting material. This paper presents the findings of a series of uniaxial tensile tests that were conducted on polyurea over the strain rate region from 0.006 to 388s-1. The stress-strain behavior of the polyurea sample was established at different strain rates, and key mechanical properties of the material were determined. The results indicate that the stress-strain behavior of the material at high strain rates were considerably non-linear and exhibited significant rate dependency. The characteristics of the stress-strain curves at quasi-static and at higher strain rates can be described as rate-dependent linear elastic/piecewise linear strain hardening. Based on the findings of the experiments, the influence of strain rate effects on the modulus and yield stress of the polymer were analyzed and empirical correlations to describe the dynamic increase factor (DIF) of the modulus of elasticity and the yield stress at high strain rates were proposed.

AB - Elastomeric polymers, like polyurea, are finding relevance in strengthening applications and as energy absorbing materials for structures and systems subjected to impulsive loadings. Understanding the dynamic behavior of these materials is essential for their application as an effective protective and retrofitting material. This paper presents the findings of a series of uniaxial tensile tests that were conducted on polyurea over the strain rate region from 0.006 to 388s-1. The stress-strain behavior of the polyurea sample was established at different strain rates, and key mechanical properties of the material were determined. The results indicate that the stress-strain behavior of the material at high strain rates were considerably non-linear and exhibited significant rate dependency. The characteristics of the stress-strain curves at quasi-static and at higher strain rates can be described as rate-dependent linear elastic/piecewise linear strain hardening. Based on the findings of the experiments, the influence of strain rate effects on the modulus and yield stress of the polymer were analyzed and empirical correlations to describe the dynamic increase factor (DIF) of the modulus of elasticity and the yield stress at high strain rates were proposed.

KW - Dynamic increase factor

KW - Polyurea

KW - Strain rate

KW - Stress-strain behavior

KW - Uniaxial tensile test

UR - http://www.scopus.com/inward/record.url?scp=84875775184&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84875775184&partnerID=8YFLogxK

U2 - 10.1016/j.matdes.2013.02.063

DO - 10.1016/j.matdes.2013.02.063

M3 - Article

AN - SCOPUS:84875775184

VL - 50

SP - 124

EP - 129

JO - Materials and Design

JF - Materials and Design

SN - 0264-1275

ER -