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Viscoelastic

Viscoelasticity Kelvin-voigt model in Abaqus

Submitted by RaphEmm on
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Computational Mechanics Forum
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ABAQUS/CAE
Viscoelastic
Viscoelasticity in UMAT

Hi all,

I'm trying to model kelvin-Voigt type material (response of it during time)

The equation is very basic : sigma*epsilon+d/dt epsilon*viscosity coefficient(eta)

i'm wondering how to impliment the viscous term eta in Pa.s (experimental results gave me the value) in my model.

The theory is very simple but i can't figure out how to do such thing in Abaqus.

I tried Pony type but i don't now how to calculate the coefficients..

 

Can you help me?

Viscoelastic Effects on Electromechanical Instabilities in Dielectric Elastomers

Submitted by Harold S. Park on
research
fracture
finite element
crack propagation
electromechanical instability
dielectric elastomer
Viscoelastic

Recently accepted for publication in Soft Matter:

(http://pubs.rsc.org/en/Content/ArticleLanding/2013/SM/C2SM27375F)

(http://dx.doi.org/10.1039/c2sm27375f)

Viscoelastic model parameters in LS-Dyna

Submitted by HSD83 on
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Viscoelastic
LS DYNA
parameters
loss modulus

I'm using elastic solid elements to model wave propagation in an
structure in LS-DYNA. I need to add the effect of dissipation in the
system by using viscoelastic material model (MAT_006). All I know from
my material is storage & loss modulus (E=E'+E"*i). I was wondering
how can I transform these parameters into G0, GI and BETA needed by
MAT_006 (G=Gi+(G0-Gi)*exp(-beta*t))?

Viscoelastic material model in abaqus-am i taking the correvt approach

Submitted by FYPNoddy on
ABAQUS
Viscoelastic
creep test data
polypropylene

Hi all,



I have been trying to gain an understanding of representing a viscoelastic material in abaqus. To do this i have been trying to represent polypropylene using data obtained from creep curves found in literature (attached). To now what i have been doing is the following: Note i am using Abaqus 6.7



In material manager: selecting Elastic-inputting Instantaneous Youngs Modulus, E, Poissons, v, (E=1.8GPa, v=0.4) and setting the moduli time scale to instantaneous. And Viscoelastic-Domain:Time, Time=Creep Test data and inputting Shear Test Data

Dynamic Modeling for Viscoelastic material using ANSYS

Submitted by parimal_maity on
research
Viscoelastic

Hello,

I am planing to model a viscolestic material in ANSYS and condition is dynamic.

Could anyone please suggest what are the essential things (i mean datas) required for modeling a viscoelastic material?

For example, If I do the DMA test of viscoelastic materials i can have the modulus data at different frequencies. How to use those data in ANSYS to find out the stress-strain curve?

Thnaks for your kind help

parimal maity

please help me

Submitted by araya on
Viscoelastic

hello i am writing u from ethiopia now i am doing  design and modeling of motorcycle helmet using viscoelastic materials but i couldn't be able to understand how to use the material models so please help me by showing the prosudure how to use viscoelastic materials proporty

yours araya

arya_abera [at] yahoo.com (arya_abera[at]yahoo[dot]com)

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