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Lightweight structures

Submitted by R. Gabbrielli on
research
Lightweight structures
porous materials

For those of you interested in the geometry of light frameworks and models for extremely porous materials, here are a couple of links. The first one contains two 3D objects. You need Java to view them.

http://people.bath.ac.uk/rg247/swansea/javaview/gyroid_146_007.html

http://people.bath.ac.uk/rg247/swansea/gyroid_146_007_n.png

How to build a contact model involved the plastic defoemation?

Submitted by Mike lee on
research
Plasticity

Hello, everyone.

Recently, I am trying to build a plastic contact model to describe teh relationship between the plastic deformation and the contact force, which is a crucial point in my work that dealing with the grasp force in robotics. So, anybody has some ideas about this? Actually, I am attempting to find a analytic model.

 

Stress fields for finite crack in an infinite plate under tension

Submitted by vinay kumar B A on
research
fracture mechanics

hi...

 

       I am working on cracks emanating from a hole,  using Complex
stress potential method.  Now i have obtained the Stress Intensity
Factor ( SIF ) and now i want to plot the stress field or stress
contours. please guide me how i can get stress field.



Thanking you.



Yours Sincerely



vinay     

Crack modeling

Submitted by vinay kumar B A on
research
FEM

 

hi.

 

         I want to model a " Two cracks in infinete plate in ansys" but it is possible to use one quarter point element at a time.

 

    please help me how to model two cracks in ansys or  if it is easily possible in abaqus then also i am interested.

 

thanking you

 

viny

 

 

 

Stress fields for finite crack in an infinite plate under tension

Submitted by vinay kumar B A on
research
fracture mechanics

 

hi.

 

  I am working on " crack emanating from a circular hole in anisotropic medium".  now i got the K1 ( SIF`s) using complex stress potential method. Now i want to represent the results in the form of stress field around the crack.

  i am unable to find the stress field around this crack.

 

    i request you to hint the procedure to plot the stress fields.



thanking you.



Yours Sincerely

vinay.

 

Question on Modeling in ABAQUS

Submitted by mcmistry on
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Displacement constraints

Dear All,

I am modeling rubber seal with hyperelastic material and I am using CAX4R Element for modeling. I achieved contact solution using initial analysis and as an output I got contact pressure and radial and axial displacement of the nodes.

crack tip closure concept

Submitted by uni_students2009 on
research
fracture mechanics

measurment of FCG based on crack tip closure concept depend on :

1- experimental technique

2-location of the measurement

3- mean stress effect on FG at high stress ratio can not be explained by the closure model due to the absense of the crack closure at high loads.

Two question can be investigated as follows:

1- why crack tip closure is popular and it widely use in hightech industry like aircraft industry acording to overwiew of scentific articles.?

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