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Numerical Simulation of Particle Stress and Fracture using FEMDEM: Application to Process Catalysts

Submitted by marigom on
job
fracture
FEM
discrete element method
DEM
imperial college
johnson matthey

Supervision:

 Dr JP Latham, Dr Jiansheng Xiang

Industry Contacts:

Principal Investigator - Dr Michele Marigo

Co-investigators - Dr Mikael Carlsson, Prof Hugh Stitt

Applications are invited for a PhD studentship to join AMCG (Applied Modelling and Computational Group) in the Department of Earth Science & Engineering.

Saint-Venant's Principe of the Problem of the Cylinder: Modified

Submitted by Jian-zhong Zhao on
research

The Statement of Modi ed Saint-Venant's Principle is suggested. The

axisymmetrical deformation of the infi nite circular cylinder loaded by an

equilibrium system of forces on its near end is discussed and its formulation of Modi ed Saint-Venant's Principle is established. It is evident that

fi nding solutions of boundary-value problems is a precise and pertinent

approach to establish Saint-Venant type decay of elastic problems.               T

Abaqus - MISES stress as output variable

Submitted by Anonymous (not verified) on
ABAQUS/CAE
Hi,
 
I am doing a simulation in abaqus where pressure is applied over a rectangular solid model. I requested MISES output from one of the element where the pressure load is applied. My doubt is, " Is that possible to find the possible biggest model size above which the MISES stress will be constant ? ".
 
Boundary conditions are such a way that X and Z coordinates are totally constrained. the load is applied on the y-direction. 
 

dynamic stiffness definition in abaqus

Submitted by TaoLI on
mechanician
non-lineair stiffness modeling

I am working on the vibratory simulation of engin cooling system. Now i want to add the component of rubber isolators , the idea is to add the spring element ,we have tested the dynamic stiffness during ranges of 5-100HZ , but how can i put the values in abaqus ou inp files.

Thanks for your helps

How to postprocess user defined results in patran

Submitted by Stacky on
research

Hello friends,

        Greetings! I used Msc Patran to create a 2D mesh. Using mesh properties I solved a time-dependent partial differential equation using finite element in that domain through c code. Now,I have nodal values at different time. I would like to plot contours using those nodal values. I came to know Patran can do this. If so , can someone give some tips or guide me to an example.



Thank you.

Dislocation density based model in FEM

Submitted by sbagherzadeh on
research
Dislocation density based model in FEM

Dear all,

Hi

I am phd student of mechanical engineering. I am working about dislocation density based model for plastic deformation. I wanna write UMAT for describe used material behavior. Can everyone give me experiences about DD model in FEM? Please help me about writing UMAT for this issue.

 

Thank you,

S. Bagherzadeh

fe-safe

Submitted by Hesham Elkanani on
software
ABAQUS
fe-safe

I'm using Abaqus in analysis of random vibration fatigue. I linked abaqus with fe-safe to calculate the fatigue life. Fe-safe didn't recognize the random load comming from Abaqus correctly, althghou it already recognize the cyclic(normal) load crrectly in one of the tutorial's attached example.

Do any body know how to solve this issue? 

VUMAT

Submitted by bagheriasl on

Thanks alot, you gave a big favor to me and I appreciated that.

So I have to define all tensor component individually as sate variables alike before I did and then I defien the number of state variables in DEPVAR option as well as user material constants. I have done it. Then as you told all the state variables must be shown in field output? you mean when we define state variables and update it then we can observe the SDVs at the visualization modul\odb field output or it will save in a separate file???

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