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FRICTION STIR WELDING -SIMULATION-ABAQUS

Submitted by darko144 on Fri, 08/20/2010 - 13:57

Could you tell me how to define inflow and outflow eulerian boundary in ALE? MY ERROR IS "An Eulerian boundary region cannot overlap a sliding boundary region"

Defined in the first interface surface, and then modify the inp file, change to add

REGION TYPE = EULERIAN

*SURFACE, NAME=SURF1, REGION TYPE=SLIDING

TOP,S4

*SURFACE, NAME=EULER1, REGION TYPE=EULERIAN

EULER1,S3

Then, I go on the File/Import/Model...inp.file - when he fined warning

Use of Hashin damage criteria for plain woven composites in ABAQUS.

Submitted by aelias on Fri, 08/20/2010 - 12:08

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Hi,

I am trying to model impact damage in a composite plate made of woven plies lay-up. I have 2 questions probably basics but I can't find any clear answer and I hope someone could help me.

1) Can the Hashin damage criterion in ABAQUS be applied to a plain woven composites? I know that initially Hashin critrion was for unidirectional composites and looking at the equations I can't see how this criterion could make the difference between matrix and fibre failure in the case of woven composites, but I can't find any restriction in ABAQUS documentation.

Two PhD studentships in computational fracture mechanics at the University of Glasgow

Submitted by grassl on Fri, 08/20/2010 - 09:45

job

fracture mechanics

concrete

There are two PhD studentships available at the University of Glasgow in the area of computational fracture mechanics of concrete.

The topics are multiscale modelling of corrosion induced cracking and meso-mechanically motivated nonlocal models for fracture.

Please visit my webpage at http://www.civil.gla.ac.uk/~grassl for more information.

All the best,

Peter Grassl

How to define eulerian region for 2D modeling of orthogonal machining using ALE adaptive mesh constraints?

Submitted by AmirAshy on Thu, 08/19/2010 - 22:31

education

I am working with abaqus6.8.1. I am interesting to model orthogonal
machining by ALE adaptive remeshing IN 2D. In this way I have a problem.
For modeling of machinig inflow and outflow surfaces(eulerian) with
inflow boundary condithion type velocity(eulerian) must be defined.but
the default definition of surfaces and region or boundary type in abaqus
are lagrangian. I read on user manual that this type must be change to
eulerian.

abaqus, cel, coupled eulerian lagrangian, fluid flow

Submitted by Ledjani on Thu, 08/19/2010 - 13:40

coupled eulerian lagrangian

I am trying to model a tube which is filled with liquid that is being crushed. I am using Coupled Eulerian Lagrangian to model the problem in abaqus, and there are a few distortions/errors in the model. I am using symmetry to model only quarter of the model. The liquid actually comes out from the sides of the tubes as the two attached pictures show.