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modeling simply supported beam in ansys

Submitted by Dhanashri Joglekar on

Hi,

I am modeling a simply supported beam in ansys using a plane 183 element. In this case (A two dimensional beam model) how should I give the B.C.s? Should I apply B.C.s to

1)  the mid node on the edge of beam? or

2) to the entire edge? or

3)  just to the bottom node?

according to me the first choise seems OK. But the results are not satisfactotry. plz help.

Dhanashri.

Another New Blog

Submitted by drowsed on

Several month ago I login a account ,then writen my fist blog.But I can not think back my login email,so I have to login with a new email. In the last months ,Most of time was spend in program.My Boss except me to get repetition of Werner's work --computer simulation of dunes. Now I get work finished. It's amazing and excited.

 

Solid elastic sphere impact with rigid flat surface

Submitted by abeed on

i am a student. I would like to simulate impact of an elastic solid ball with rigid flat surface, I do not know how to create the best mesh for the ball so i obtain good results with ansys LS Dyna (drop test modue). of course there are some advice in DTM like avoiding tetrahedron or sharp edges, ... etc. please help me i think a ball meshed with brick element produce better results but, how can one mesh the ball entirely with only  bricks (no tetrahedron)

Post-doctoral Position in Multiscale Modeling at Caltech

Submitted by bhatta@caltech.edu on
The Center for the Predictive Modeling and Simulation of High-Energy Density Dynamic Response at the California Institute of Technology seeks a post-doctoral scholars in the broad area of multiscale modeling of materials.  The scholar will be supervised by Professor Kaushik Bhattacharya, and will develop fast multiscale models that implicitly account for the microstructural features during the dynamic deformation of materials.

Stress-induced phase transformation and pseudo-elastic/pseudo-plastic recovery in intermetallic Ni–Al nanowires

Submitted by Vijay Kumar Sutrakar on

Dear friends,

I want to share our recent research work on NiAl nanowire, which is published in Nanotechnology, IOP publishing. The abstract of the paper is given below. Further details can be found at "Vijay Kumar Sutrakar et al 2009 Nanotechnology 20 295705 (9pp)   doi: 10.1088/0957-4484/20/29/295705"

 

Modelling Impact on ANSYS-AUTODYN OR ANSYS-LS-DYNA

Submitted by sherifmshaaban on

I have one very simple question regarding ANSYS-AUTODYN and LS-DYNA. It seems that both can model impact loads.



My
questions is which can model low-velocity impacts and which can model
high-velocity impacts. I have some troubles modelling low-velocity
impacts in autodyn (changing the mass of the projectile does not affect
the pressure and the stresses on the target. Does this mean autodyn
only models high-velocity impacts)

Large deformation and electrochemistry of polyelectrolyte gels

Submitted by Wei Hong on

Immersed in an ionic solution, a network of polyelectrolyte polymers imbibes the solution and swells, resulting in a polyelectrolyte gel. The swelling is reversible, and is regulated by ionic concentrations, mechanical forces, and electric potentials. This paper develops a field theory to couple large deformation and electrochemistry. A specific material model is described, including the effects of stretching the network, mixing the polymers with the solvent and ions, and polarizing the gel.

Some problem concerning the position of increment in ABAQUS subroutines.

Submitted by Lianhua Ma on

Dear all,

 

 I have a puzzling question. 

As we know, the positions of a increment in a FEM analysis ( in abaqus) include :

 1.  the start of the increment    2.    the end of the increment   3.     the current increment     etc

 It is easily understood. But the data transfer process in different subroutines have me puzzled.  

For example:  Subroutines of ABAQUS