In-plane and out-of-plane fracture toughness of physically aged polyesters as assessed by the essential work of fracture (EWF) method

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21 Citations (Scopus)

Abstract

The in-plane (mode I) and out-of-plane (mode III) fracture behavior of amorphous (co)polyester sheets are studied as a function of physical aging using the essential work of fracture (EWF) concept. Physical aging was followed by measuring the yield stress and enthalpy relaxation of the (co)polyesters. The specific essential work of fracture term did not reflect the physical aging either in mode I or III loading. On the other hand, the corresponding values were closely matched indicating the mode III type loading turns into mode I for thin films. Aging was best manifested in the mode I - related EWF parameters, viz. specific yielding-related essential work and non-essential necking/tearing related work.

Original languageEnglish
Pages (from-to)251-265
Number of pages15
JournalInternational Journal of Fracture
Volume135
Issue number1-4
DOIs
Publication statusPublished - Sep 2005

Fingerprint

Fracture Toughness
Polyesters
Fracture toughness
Aging of materials
Yield Stress
Yield stress
Thin Films
Enthalpy
Thin films
Term

Keywords

  • Amorphous copolyester
  • Essential work of fracture
  • Fracture toughness
  • In-plane
  • Out-of-plane
  • Physical aging

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Mechanics

Cite this

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title = "In-plane and out-of-plane fracture toughness of physically aged polyesters as assessed by the essential work of fracture (EWF) method",
abstract = "The in-plane (mode I) and out-of-plane (mode III) fracture behavior of amorphous (co)polyester sheets are studied as a function of physical aging using the essential work of fracture (EWF) concept. Physical aging was followed by measuring the yield stress and enthalpy relaxation of the (co)polyesters. The specific essential work of fracture term did not reflect the physical aging either in mode I or III loading. On the other hand, the corresponding values were closely matched indicating the mode III type loading turns into mode I for thin films. Aging was best manifested in the mode I - related EWF parameters, viz. specific yielding-related essential work and non-essential necking/tearing related work.",
keywords = "Amorphous copolyester, Essential work of fracture, Fracture toughness, In-plane, Out-of-plane, Physical aging",
author = "T. B{\'a}r{\'a}ny and F. Ronkay and J. Karger-Kocsis and T. Czig{\'a}ny",
year = "2005",
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T1 - In-plane and out-of-plane fracture toughness of physically aged polyesters as assessed by the essential work of fracture (EWF) method

AU - Bárány, T.

AU - Ronkay, F.

AU - Karger-Kocsis, J.

AU - Czigány, T.

PY - 2005/9

Y1 - 2005/9

N2 - The in-plane (mode I) and out-of-plane (mode III) fracture behavior of amorphous (co)polyester sheets are studied as a function of physical aging using the essential work of fracture (EWF) concept. Physical aging was followed by measuring the yield stress and enthalpy relaxation of the (co)polyesters. The specific essential work of fracture term did not reflect the physical aging either in mode I or III loading. On the other hand, the corresponding values were closely matched indicating the mode III type loading turns into mode I for thin films. Aging was best manifested in the mode I - related EWF parameters, viz. specific yielding-related essential work and non-essential necking/tearing related work.

AB - The in-plane (mode I) and out-of-plane (mode III) fracture behavior of amorphous (co)polyester sheets are studied as a function of physical aging using the essential work of fracture (EWF) concept. Physical aging was followed by measuring the yield stress and enthalpy relaxation of the (co)polyesters. The specific essential work of fracture term did not reflect the physical aging either in mode I or III loading. On the other hand, the corresponding values were closely matched indicating the mode III type loading turns into mode I for thin films. Aging was best manifested in the mode I - related EWF parameters, viz. specific yielding-related essential work and non-essential necking/tearing related work.

KW - Amorphous copolyester

KW - Essential work of fracture

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KW - In-plane

KW - Out-of-plane

KW - Physical aging

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