Cure-dependent viscoelastic poisson's ratio of epoxy

Dobrien J. O'Brien; N. R. Sottos; S. R. White

doi:10.1007/s11340-006-9013-9

Cure-dependent viscoelastic poisson's ratio of epoxy

Dobrien J. O'Brien, N. R. Sottos, S. R. White

Research output: Contribution to journal › Article › peer-review

Abstract

The evolution of the lateral contraction ratio of two commercial (high and low temperature cure) epoxy resins is studied in uniaxial tension using moiré interferometry. The ratio of transverse to axial strains evolves from an elastic value of about 0.40 to a rubbery plateau value of 0.49 at long times. Furthermore, the data indicate that the contraction ratio follows time-temperature superposition with a shift function indistinguishable from other axial viscoelastic functions. The lateral contraction behavior at several cure states past gelation was measured and a model is proposed to describe the cure dependence.

Original language	English (US)
Pages (from-to)	237-249
Number of pages	13
Journal	Experimental Mechanics
Volume	47
Issue number	2
DOIs	https://doi.org/10.1007/s11340-006-9013-9
State	Published - Apr 2007

Keywords

Cure-dependence
Moiré interferometry
Poisson's ratio
Viscoelasticity

ASJC Scopus subject areas

Mechanics of Materials
Computational Mechanics

Online availability

10.1007/s11340-006-9013-9

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title = "Cure-dependent viscoelastic poisson's ratio of epoxy",

abstract = "The evolution of the lateral contraction ratio of two commercial (high and low temperature cure) epoxy resins is studied in uniaxial tension using moir{\'e} interferometry. The ratio of transverse to axial strains evolves from an elastic value of about 0.40 to a rubbery plateau value of 0.49 at long times. Furthermore, the data indicate that the contraction ratio follows time-temperature superposition with a shift function indistinguishable from other axial viscoelastic functions. The lateral contraction behavior at several cure states past gelation was measured and a model is proposed to describe the cure dependence.",

keywords = "Cure-dependence, Moir{\'e} interferometry, Poisson's ratio, Viscoelasticity",

author = "O'Brien, {Dobrien J.} and Sottos, {N. R.} and White, {S. R.}",

year = "2007",

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AU - O'Brien, Dobrien J.

AU - Sottos, N. R.

AU - White, S. R.

PY - 2007/4

Y1 - 2007/4

N2 - The evolution of the lateral contraction ratio of two commercial (high and low temperature cure) epoxy resins is studied in uniaxial tension using moiré interferometry. The ratio of transverse to axial strains evolves from an elastic value of about 0.40 to a rubbery plateau value of 0.49 at long times. Furthermore, the data indicate that the contraction ratio follows time-temperature superposition with a shift function indistinguishable from other axial viscoelastic functions. The lateral contraction behavior at several cure states past gelation was measured and a model is proposed to describe the cure dependence.

AB - The evolution of the lateral contraction ratio of two commercial (high and low temperature cure) epoxy resins is studied in uniaxial tension using moiré interferometry. The ratio of transverse to axial strains evolves from an elastic value of about 0.40 to a rubbery plateau value of 0.49 at long times. Furthermore, the data indicate that the contraction ratio follows time-temperature superposition with a shift function indistinguishable from other axial viscoelastic functions. The lateral contraction behavior at several cure states past gelation was measured and a model is proposed to describe the cure dependence.

KW - Cure-dependence

KW - Moiré interferometry

KW - Poisson's ratio

KW - Viscoelasticity

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DO - 10.1007/s11340-006-9013-9

M3 - Article

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SP - 237

EP - 249

JO - Experimental Mechanics

JF - Experimental Mechanics

IS - 2

ER -

Cure-dependent viscoelastic poisson's ratio of epoxy

Abstract

Keywords

ASJC Scopus subject areas

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