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Constitutuive modelling of viscoelastic materials

Submitted by bhargavasista on
research

I am currently working on constictutive modelling of soft biological tissues, considering them as nonlinear viscoelastic materials. I am using the split form of energy density function i.e modelling separately the hyperelastc part and the visoelastic part. I am using Ogden formula for hyperelastic part and for the viscoelastic part, I am currently using the second and third invariants of stretch rate tensor.

Iso Chronous curve

Submitted by asit_rathod1 on
research

Thanks Vijay

                  for giving me guide lines but my altimate aim is to the finding of devlopment of iso chronous curve for creep buckling.and for that while studing nonlinear strees strain curve we know that as in non linear stage the what is the value of stress and strain at time T=0 and time T=t? is the any formula for the Et and Es in non linear stress and strain?...and which procedure for calulation foe Et and Es?

Regards

Asit Rathod

Relation Between Et(tangent Modules) & Es(secant Modules) in non linear elastic plastic theory?

Submitted by asit_rathod1 on
research

dear all

            is there any formaula or any theory by i can make a relation for the tangent and secent modules in the plastic region of the stress strain curve?....and also how to find Et and Es for the Alloy steel?.. if any body knows any thing than let me know soon..

warm regards

Asit Rathod

asit_rathod1 [at] yahoo.com (asit_rathod1[at]yahoo[dot]com)

Prestigious 5 year Fellowship -- RAEng/EPSRC Research Fellowships

Submitted by Stephane Bordas on
job
fracture
postdoc
post-doc
Fellowship
post
doctoral

To all outstanding researchers with less than 3 years of post-doctoral experience, this is a unique opportunity to secure a 5 year post-doc.

This will be highly competitive, and applicants must be of world-class quality. 

Topics available in our group:

- multiscale (fracture) mechanics

- microstructurally-faithful modelling

- surgical simulation

- coupled moving boundary problems 

- meshfree methods 

- quantum simulations

For more details, please see below, and contact me at

Postdoctoral Associate position available at MIT

Submitted by Markus J. Buehler on
job
materials science
postdoc
computational
multi-scale
biology
job openings

A postdoctoral associate position at MIT is available immediately, in the broad area of atomistic, molecular and multi-scale modeling of hierarchical biological, bioinspired and nanostructured materials. Material properties of specific interest include mechanical properties, in particular deformation and failure mechanisms. The work will emphasize on mutable properties (mechanomutability, thermomutability) and the analysis and design of adaptive, responsive, and robust materials through the integration of scales, from nano to macro. 



Interface elements versus continuum elements

Submitted by Gouse on
research
Interface elements
continuum elements

Hi,

I am modeling interface, its thickness is around 100 micron, I am modeling this problem in ABAQUS, my doubt is, can I use continuum elements like plane stress or plane strain to model this interface with conventional materail models available in ABAQUS or do I have to use interface elements with cohesive zone models. My main doubt is why should I use interface elements, whether plane or solid elements cannot handle interface, please can any body educate on this topic.

THank you

Regadrs

Gouse

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