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software of interest to mechanicians

Can somebody suggest a general-purpose object oriented design of the finite element?

Submitted by Wenbin Yu on
software

I am looking into object oriented programing of the finite element method. I don't know whether somebody can provide a general-purpose oop design of a general finite element program, say a linear static analysis of a 3D solid. Or somebody who are experienced in this field point out some good references for this purpose. It will be better if the oop design is language free, i.e. not directly related with implementation in a specific language such as c++. Thanks in advance.

defining interaction between a lot of surfaces in abaqus.

Submitted by rezarozi61 on
software
defining interaction between a lot of surfaces in abaqus.

 Dear all:

During simulation in ABAQUS , I encountered a severe problem . I used ABAQUS Explicit but I could not define the interactions between for example 200 particles.I mean I used surface-to surface contact (explicit),so I had to define many many interactions between every particle with the others ,which is waste of time.It seems that I have to use  General contact(explicit) ,but by using general contact (explicit),an error occured which says :"CONTACT currently does not support the use of 2D surfaces".

I appreciate any ones help.

Influence of Penalty stiffness factor on simulation results

Submitted by abeed on
software
explicit dynamics
Penalty stiffness scaling factor
ANSYS- LSDYNA

The default value of penalty stiffness scale factor in Ansys-Lsdyna  is 0.1, when one varies this value, he/she obtains different results, the question, how can one  know the right value of penalty stiffness scale factor?

 

I am simulating the impact of a 6mm - diameter steel solid ball with a rigid falt surface using Ansys-Lsdyna. the speed of the ball at the impact moment  is low (from 1 to 10 m/s). specificly, i am intersted in the period between  just touching and  just leaving the ground for the first impact.

how to open the fil file ( *.fil ) in abaqus program ??

Submitted by amin_dezfuly on
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hi

i am working with abaqus program

i run a analysis with propagtion crack and then i have fil file ( *.fil )

i konw that detailed information are in the fil file. but i could not be opening and view this fil file. i dont know that how to open fil file ( *.fil )

please help me

how the method for open and view fil file ( *.fil ) ???

please help

thanks

a question about an ANSYS command of applying Boundary conditions

Submitted by Eagle on
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LSEL,S,LOC,Y,0 $LSEL,R,LOC,X,0.1

DL,ALL,,UY

 LSEL,S,LOC,Y,0 $LSEL,R,LOC,X,0.9 DL,ALL,,UY

 the first commands are always overrided by the second sets. I want to apply constraints to both lines, but why the first never works?

 Also, I have same problem with area constraints,

Thanks a lot if you could help me solve this problem!

--------------------------------------------------------------------------------

Thanks for all the replies!  Already solved.

Anybody knows a molecular dynamics software for Windows operative systems?

Submitted by marco.paggi on
software
molecular dynamics

 

Dear All,

I am looking for a freeware molecular dynamics software working for Windows operative systems.

I have tried LAMMPS, but it seems to me that it works only under UNIX. 

Thank you very much in advance for any information.

Best wishes, Marco Paggi 

_____________________________________

Dr. Ing. Marco Paggi, Ph.D.

Assistant Professor of Structural Mechanics

Alexander von Humboldt Research Fellow 2010-2011

Member of the Executive Board of the Italian Group of Fracture 2009-2011

Does anyone know which software can plot implicit functions?

Submitted by Peichen1573 on
software
software，implicit function

I'm new to this web,but I know this is a wonderful  forum for reserchers where you can discuss scientific problems with others.(some professors are  experts in their fields). I'm now studying anisotropic yield criteria,so I need  a graph software which can plot implicit funtions (such as  ellipse in the form of x^2-x*y+y^2=1) as well as experimental data.

I know Graph can plot implicit funtions,but the quality of  its graph is not good enough.Anyone knows other softwares please give me some advice,thanks in advance.

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