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Soil Mechanics and Fossil Dinosaur Trackways

Submitted by Lee Margetts on
research
penetration
Plasticity
soft substrates
soils
Pile & Foundation
von mises
Geotechnics
Geotechnical engineering
foot deformity
Track

My PhD student Peter Falkingham (who graduated 15 December 2010) has published some interesting papers on Dinosaur Trackways. These might be of interest to those teaching Soil Mechanics, to give some examples that might be more stimulating than foundation design or traditional geotechnical engineering.

References below:

ABAQUS:Negative Pressure with “Hard” Pressure-Over Closure

Submitted by thanu on
research
ABAQUS; hard contact

Hi,

I'm using ABAQUS for my research o soil-pile interaction. For the initial modeling of soil-pile interface I have used the "Hard" pressure-over closure relationship. According to the definition negative pressure is not possible with that type of normal contact behavior. But when I check the contact pressure still I can see that negative pressure is applied. What could be the reason?

Thanks,

Thanu

Varying material properties spatially in ABAQUS

Submitted by Vaibhav Yadav on
research
ABAQUS
User subroutines in ABAQUS

Hi,

In an ABAQUS 2D-planar model, is it possible to vary the material properties spatially, say defining modulus (E) as a function of coordinates, E = f(x,y)? One way is to use *DISTRIBUTION feature, but that allows variation based on element-sets and does not allow varying the material properties as function of coordinates. If anyone has solved this or similar problem kindly suggest.

 

Thank you

Vaibhav

Virtual Heart Surgery

Submitted by ADINA Support on
research
anisotropic
hyperelastic
Fluid Structure Interaction
Mooney-Rivlin
large deformations
Holzapfel
patient-specific
large strains

1. We highlight a study performed by researchers using ADINA in which they investigated a computational approach to construct patient-specific ventricle models based on in vivo cardiac magnetic resonance (CMR) imaging for surgical planning and optimization. The study was motivated by the fact that the use of such computational models can help to assess different surgical hypotheses and replace empirical and perhaps risky clinical experimentation. For more information please see

http://www.adina.com/newsgH81.shtml

How to get the uncoupled natural frequencies

Submitted by mangnan on
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Hello Everybody,

A wing was simplified with 8 dumbbelss or concentrated mass. The weight of the 8 dumbbells are:

{W}=[1.240 1.050 0.964 0.862 0.733 0.628 0.634 0.457]T

The static unbalance is:

{SA}=[0.2680 0.2910 0.1810 0.1610 0.1220 0.0884 0.0854 0.0598]T

The moment of inertia is:

{IA}=[0.412 0.437 0.272 0.230 0.157 0.143 0.115 0.055]T

drying modeling in abaqus

Submitted by M.Heydari on
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Good morning

I'm working in Abaqus on drying modeling. Regards this i have two questions.

1)Drying modeling is possible in Abaqus

2)I would like to ask if it is possible for Abaqus to model drying how can i create automatic crack propagation in 2D or 3D

P.S. sorry for my english, i hope everything is clear enough to understand this post. i hope someone can help me.

Regards

Mohsen Heydari

A Field Theoretic Approach to the Quasi-Continuum Method

Submitted by Vikram Gavini on
research
Multi-scale modeling
Quasicontinuum method

Dear Colleagues,

I wish to bring to your attention my recent work with Mrinal Iyer on a field theoretic approach to the quasi-continuum method to appear in Journal of the Mechanics and Physics of Solids. Below is the abstract and attached is the preprint of the article. I will very much appreciate your comments and suggestions.

A Field Theoretic Approach to the Quasi-Continuum Method

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