Damage Simulation For The Lifespan
Of Elastomers
Author(s)
P. Brož
Abstract
The principles of continuum damage mechanics (CDM) are employed to solve
the fatigue damage characteristics of elastomers. In so doing, both the damage
strain energy release rate and the elastic energy, as a function of strain versions,
of a damaged material rendered according to Ogden model, are put forward.
Further, the damage evolution low is set up to express the fatigue lifespan in
terms of the nominal strain amplitude subject to cyclic loading. Fatigue tests of a
carbon rubber were performed to stipulate the fatigue life-dependence on the
nominal stress amplitude, and to compare experimental data with the theoretical
formula derived for the fatigue life. To get the stress-strain curve, uniaxial
tension tests on a carbon-filled natural rubber were realized. For the said
substance, material parameters were defined by fitting the experimental stressstrain
curve to Ogden constitutive simulation.
Keywords: carbon rubber, dissipative mechanism, filled elastomers, fitting,
hyperelasticity, state law, strain energy potential.
1 Introduction
Continuum Damage Mechanics introduces a scope to express the damage
constitutive equations and to extend them to 3D, according to computations of
construction. Some essential aspects of both general circumstances and
numerical studies going with CDM are included in publications [1–4].
The Lemaitre damage evolution law of a damage rate determined by plasticity
adding, which is also improved by the elastic energy density, is able to solve the
effects: ductile failure, fatigue, creep and creep-fatigue of metals or polymers
[1, 6]. In the case of materials such as composites, concrete and filled elastomers,
Keywords
carbon rubber, dissipative mechanism, filled elastomers, fitting,
hyperelasticity, state law, strain energy potential
Related Book
Other papers in this volume
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