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efg method

Submitted by venkata_krishna on
research
efg 1d program

Dear Prof. Dolbow

 In your 1D efg program, you have used u=d(1:nnodes). I think, you should calculate "u" by summing after multiplying with the shape functions and "d". Because in the figure 2 phi(x) is not equal to one at the node. Phi(x) satisfies the partition of unity.

Please clearify my doubt if I am wrong.

Best regards

krishna

venkatakrishnaraop [at] gmail.com (venkatakrishnaraop[at]gmail[dot]com)   

Fatigue Crack Propagation Analysis by means of ANSYS

Submitted by Sanam Saebi on
research

HI Every Body

 I am postgraduate student of NavalArchitecture, My thesis is Fatigue Crack Propagation in ship Industry, I want to use Ansys Software for this purpose, at first I generated a plate with a central Crack and did fine mesh around crack and saw the results, for next step I should propagate the crack, my questions are as below:

1. How we can predict the Crack path?

2. how should I growth the crack? shall I clear mesh and extend the crack or.....???? I don't know?

3. How Can I use from Interface Elements?

Surface Energies? Continuum Molecular Dynamics?

Submitted by Mike Graham on
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molecular dynamics
contact
contact mechanics
continuum molecular dynamics
Lennard-Jones
van der Waals force

I recently encountered the research of Phil Attard and others, in which the contact problem is solved, relaxing the restrictions of the traditional contact models (Hertz, JKR, DMT) and solving based on a formulation where the governing equations are derived using finite-range surface forces and calculated numerically, self-consistently.

ANSYS

Submitted by r.a.alashti on
research
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Dear all,

Hello, I am working on stress analysis of a plate by ANSYS, I need to change material properties and real constants of some elements while the load is increased say from load step 1 to 1.1 and onwards. By using restart command the program either restart the analysis from zero loading with new values of MT and RC for the elements or keep the substeps of the load and does not change the MT and RCs.

Please note that the selected element does not support "kill" command. 

Glass thermal stress and fracture

Submitted by pinew on
research
finite element
glass

I have an investigation on glass fracture in fire.

I have a fortran program and it can calculate the thermal stress with steady-state temperature and force load using finite element method, Now I want to change it to transient temperature and force load.

I wonder which method should be taken? I'd like to calculate the fracture at last.

Please help me! 

Thank you very much.

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