Modelling of the post-yield response of glassy polymers: influence of thermomechanical history

E.T.J. Klompen, T.A.P. Engels, L.E. Govaert, H.E.H. Meijer

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

159 Citaties (Scopus)

Uittreksel

The continuous development of constitutive equations for the finite strain deformationof glassy polymers has resulted in a number of sophisticated models that can accuratelycapture the materials’ intrinsic behaviour. Numerical simulations using these modelsrevealed that the thermal history plays a crucial role in the macroscopic deformation.Generally, macroscopic behaviour is assumed not to change during a test, however, forcertain test conditions this does not hold and a relevant change in mechanical properties,known as physical ageing, can be observed. To investigate the consequences ofthis change in material structure, the existing models are modified and enhanced by incorporatingan ageing term and its parameters are determined. The result is a validatedconstitutive relation that is able to describe the deformation behaviour of, in our case,polycarbonate over a large range of molecular weights and thermal histories, with oneparameter set only.
TaalEngels
Pagina's6997-7008
TijdschriftMacromolecules
Volume38
Nummer van het tijdschrift16
DOI's
StatusGepubliceerd - 2005

Vingerafdruk

polycarbonate
Polymers
Aging of materials
Polycarbonates
Constitutive equations
Molecular weight
Mechanical properties
Computer simulation
Hot Temperature

Citeer dit

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title = "Modelling of the post-yield response of glassy polymers: influence of thermomechanical history",
abstract = "The continuous development of constitutive equations for the finite strain deformationof glassy polymers has resulted in a number of sophisticated models that can accuratelycapture the materials’ intrinsic behaviour. Numerical simulations using these modelsrevealed that the thermal history plays a crucial role in the macroscopic deformation.Generally, macroscopic behaviour is assumed not to change during a test, however, forcertain test conditions this does not hold and a relevant change in mechanical properties,known as physical ageing, can be observed. To investigate the consequences ofthis change in material structure, the existing models are modified and enhanced by incorporatingan ageing term and its parameters are determined. The result is a validatedconstitutive relation that is able to describe the deformation behaviour of, in our case,polycarbonate over a large range of molecular weights and thermal histories, with oneparameter set only.",
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Modelling of the post-yield response of glassy polymers: influence of thermomechanical history. / Klompen, E.T.J.; Engels, T.A.P.; Govaert, L.E.; Meijer, H.E.H.

In: Macromolecules, Vol. 38, Nr. 16, 2005, blz. 6997-7008.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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AU - Engels,T.A.P.

AU - Govaert,L.E.

AU - Meijer,H.E.H.

PY - 2005

Y1 - 2005

N2 - The continuous development of constitutive equations for the finite strain deformationof glassy polymers has resulted in a number of sophisticated models that can accuratelycapture the materials’ intrinsic behaviour. Numerical simulations using these modelsrevealed that the thermal history plays a crucial role in the macroscopic deformation.Generally, macroscopic behaviour is assumed not to change during a test, however, forcertain test conditions this does not hold and a relevant change in mechanical properties,known as physical ageing, can be observed. To investigate the consequences ofthis change in material structure, the existing models are modified and enhanced by incorporatingan ageing term and its parameters are determined. The result is a validatedconstitutive relation that is able to describe the deformation behaviour of, in our case,polycarbonate over a large range of molecular weights and thermal histories, with oneparameter set only.

AB - The continuous development of constitutive equations for the finite strain deformationof glassy polymers has resulted in a number of sophisticated models that can accuratelycapture the materials’ intrinsic behaviour. Numerical simulations using these modelsrevealed that the thermal history plays a crucial role in the macroscopic deformation.Generally, macroscopic behaviour is assumed not to change during a test, however, forcertain test conditions this does not hold and a relevant change in mechanical properties,known as physical ageing, can be observed. To investigate the consequences ofthis change in material structure, the existing models are modified and enhanced by incorporatingan ageing term and its parameters are determined. The result is a validatedconstitutive relation that is able to describe the deformation behaviour of, in our case,polycarbonate over a large range of molecular weights and thermal histories, with oneparameter set only.

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