Generalized parameter identification for finite viscoelasticity

Kleuter, Bernd; Menzel, Andreas; Steinmann, Paul

doi:10.1016/j.cma.2007.03.010

Cited by 33 publications

(24 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, note that the incorporation of a plane or uni-axial stress state-for example, by means of an additional iterative scheme-in combination with an anisotropic and isochoric response may over-constrain the identification procedure. Nevertheless, in general, material parameters should be identified based on inhomogeneous deformations and by means of different types of experiments (compare, Mahnken and Stein, 1996b;Kleuter et al, 2007). Apart from related experimental data not yet being available to the authors, such finite-element-based identification approaches are out of the scope of this contribution.…”

Section: Parameter Identificationmentioning

confidence: 99%

Anisotropic micro-sphere-based finite elasticity applied to blood vessel modelling

Alastrué

Martı́nez

Doblaré

et al. 2009

Journal of the Mechanics and Physics of Solids

116

136

View full text Add to dashboard Cite

Section: Parameter Identificationmentioning

confidence: 99%

Anisotropic micro-sphere-based finite elasticity applied to blood vessel modelling

Alastrué

Martı́nez

Doblaré

et al. 2009

Journal of the Mechanics and Physics of Solids

116

136

View full text Add to dashboard Cite

“…e.g. [5] for a detailed derivation. From this, the standard argumentation due to Coleman and Gurtin [6] yields the conditional equations for the equilibrium and non-equilibrium stress in Eq.…”

Section: Phenomenological Example: Viscoelastic Neo-hooke Curing Modelmentioning

confidence: 99%

“…In view of the above assumptions on eq and neq , equilibrium stress S eq and tangent operator E eq are updated according to Eqs. (5) and (6), respectively, whereas their non-equilibrium counterparts are determined from neq as in standard viscoelasticity. All further details required for an implementation in finite element codes will be derived in the subsequent Sects.…”

Section: Introduction and Outlinementioning

confidence: 99%

A finite strain framework for the simulation of polymer curing. Part II. Viscoelasticity and shrinkage

2010

View full text Add to dashboard Cite

A phenomenologically inspired, elastic finite strain framework to simulate the curing of polymers has been developed and discussed in the first part (Hossain et al. in Comput Mech 44(5):621-630, 2009) of this work. The present contribution provides an extension of the previous simulation concept towards the consideration of viscoelastic effects and the phenomenon of curing shrinkage. The proposed approach is particularly independent of the type of the free energy density, i.e. any phenomenologically or micromechanically based viscoelastic polymer model can be utilised. For both cases the same representatives that have been used for the elastic curing models, i.e. the Neo-Hookean model and the 21-chain microsphere model, are reviewed and extended accordingly. The governing equations are derived as well as the corresponding tangent operators necessary for the numerical implementation within the finite element method. Furthermore, we investigate two different approaches-a shrinkage strain function and a multiplicative decomposition of the deformation gradient-to capture the phenomenon of curing shrinkage, i.e. the volume reduction induced by the polymerisation reaction which may lead to significant residual stresses and strains in the fully cured material. Some representative numerical examples conclude this work and prove the capability of our approach to correctly capture inelastic behaviour and shrinkage effects in polymers undergoing curing processes.

show abstract

“…For these types of optimization problems, different methods like sensitivity analysis [15] or variation methods, genetic algorithm [16] neural networks [17] and the cascade model [18] have been applied. In this paper, the EVO, IVC and overlap degrees considered as input variables and the SFC is the output.…”

Section: Stage Onementioning

confidence: 99%

Effect of Variable Valve Timing to Reduce Specific Fuel Consump tion in HD Diesel Engine

Afshari¹,

Afrab²,

A³

2016

J Appl Mech Eng

View full text Add to dashboard Cite

Applying variable valve Actuation systems is one of the most effective ways to improve specific fuel consumption in an engine, which largely affect the pumping work. In this article determination of optimum valve timing angels, using approximation of discrete data and nonlinear regression analysis is investigated for a HD diesel engine to minimize SFC. In the first part of this study a model of compression ignition engine (OM457) in GT-SUITE software are applied for optimization. Then the indicated best angels for EVO, IVO, EVC and IVC were added to the model as lookup tables to shape the VVT system. Eventually, results indicated that using VVT angles the SFC parameter decreases more than 2% in average. Furthermore, to compare differences in emissions rate, the European stationary cycle (ESC) was applied and generated NOx pollutant was reduced 7.4%.

show abstract

Generalized parameter identification for finite viscoelasticity

Cited by 33 publications

References 56 publications

Anisotropic micro-sphere-based finite elasticity applied to blood vessel modelling

Anisotropic micro-sphere-based finite elasticity applied to blood vessel modelling

A finite strain framework for the simulation of polymer curing. Part II. Viscoelasticity and shrinkage

Effect of Variable Valve Timing to Reduce Specific Fuel Consump tion in HD Diesel Engine

Contact Info

Product

Resources

About