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2007 | Vol. 59, nr 1 | 59-89
Tytuł artykułu

On the phenomenological representation of curing phenomena in continuum mechanics

Autorzy
Wybrane pełne teksty z tego czasopisma
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
To simulate curing phenomena, for example for the purpose of optimising the manufacturing processes or to calculate the stress distribution in adhesive seams, constitutive models representing the thermomechanically-coupled behaviour of adhesives are required. During the curing reaction, the adhesive changes its thermomechanical material behaviour from a viscous fluid to a viscoelastic solid. This phase transition is an exothermal chemical reaction which is accompanied by thermal expansion, chemical shrinkage and changes in temperature. In this essay we develop a physically-theory of finite strain thermoviscoelasticity to represent these phenomena. To this end, we introduce a multiplicative split of the deformation gradient into a thermal, a chemical and a mechanical part. We define the coordinate of chemical reaction determined by an evolution equation to describe the temporal behaviour of the curing reaction. The energy of the model contains an additional term, the chemically-stored free energy, which depends on this internal variable. The mechanical behaviour of the adhesive is modelled using a constitutive approach of finite thermoviscoelasticity and the viscosities are functions of the coordinate of chemical reaction. We show that the model is compatible with the Clausius-Duhem inequality, derive the equation of heat conduction and illustrate the physical properties of the theory by a numerical example.
Wydawca

Rocznik
Strony
59-89
Opis fizyczny
Bibliogr. 40 poz., rys., wykr.
Twórcy
autor
autor
  • Institute of Mechanics, Faculty of Aerospace Engineering University of the Federal Armed Forces Munich 85577 Neubiberg, Werner-Heisenberg-Weg 39, Germany
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.baztech-article-BAT7-0004-0018
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