Does anyone know where I can find the equations used behind these calculations:
http://www.mesys.ch/calc/hertz.fcgi
I am particularly interested in calculating the subsurface stresses and shear stresses in the x,y,z directions.
I have some complex bone geometry in Abaqus, is there any way of defining the elements associated with the outer surface to have one set of material properties and the rest of the internal elements to have another set of material properties.
Another way of doing this maybe to have the first 1mm...
Hello all,
I am wondering if there is a relationship between friction and Hertz contact pressure defined somewhere. I just can't seem to find it. I could use FE to determine this, but didn't want to waste time if its already been done.
Thanks.
Hello all,
1) Does anyone know if and where I can get hold of the Abaqus API (Application programming interface) for Fortran. Someone suggested this may help me solve some uninitialized memory read problems that I am having with my subroutines.
2) Does anyone use any good debuggers for helping...
Hello all,
I would like to obtain a stress-strain data. I can access a curve from a book, but I would ideally like the actually data. I may need to run the stress-strain test myself. I am wondering the easiest way to determine the stress-strain of a material. We have very little bugdet to do...
Hello all,
Can anyone recommend any free statistical analysis software (ideally for engineering). I really need something ASAP, I am looking at normal distributions of surface asperities.
I look forward to your input, thanks.
Hello all.
I am in the process of writing a UMESHMOTION subroutine to model the wear of materails. For this I am using:
CALL GETVRMAVGATNODE(LOCNUM,JTYP,'CDISP',ARRAY,JRCD,
$ JELEMLIST,NELEMS,JMATYP,JGVBLOCK)
and
CALL GETVRMAVGATNODE(LOCNUM,JTYP,'CSTRESS',ARRAY,JRCD,
$...
I understand the basis of the math behind the error function (http://mathworld.wolfram.com/Erf.html) however...
Can anyone please explain in "engineering terms" what the error function is and how can I use it? I have found the erf(h/sqrt(2*s)) in the derivation of formula which involves...
I have a UMESHMOTION subroutine, and in this subroutine, I call the CSTRESS results and CSLIP. There seems to be a massive difference between the results. The results in the .odb file seem to be sensible, but the results written to the .msg file are not sensible. Any ideas on why this might be...
I am confused why my CLSIP1 values are showing as expected when I view them in my .ODB file in CAE, however when I print out my CSLIP values (in the x direction) from my UMESHMOTION subroutine I obtain a constant value (-1E36 throughout the step when I write CSLIP to the .msg file.
Here is the...
I am trying to determine the "Radius of curvature" of an asperity. I am using a Wyco NT-2000 surface optical profiler. I am not sure if I can determine the radius of curvature from the machine directly?
The machine can output, the "Mean Summit curvature" (as explained here...
Hello all,
I am trying to clear up my understanding of node numbers for parts in Abaqus. I have two parts. One has node number 1-54 and the other has node number 1-63. I would like to make reference to the node numbers in a subroutine, but how can I distinguish between the part node numbers...
Hello all,
I seem to be having a problem with one of my subroutines. I recieve the following error message when the complier is running.
forrtl: severe (24): end-of-file during read, unit 25, file C:\documents\docres.txt
Image PC Routine Line Source...
Does anyone have any advice on developing a software programme to work with abaqus?
I would like to develop an input software programme to where a user would input a number of values ieally through a GUI, i.e. diameter, E, etc. And this would set up an input deck to be submitted to ABAQUS. I...
Hello,
I am trying to plot CPRESS data to .dat and .fil files. I can plot the data such as MISES, U1 using the *EL PRINT and *NODE PRINT commmands. However I can not seem to plot CPRESS information using these keywords, here is part of the STEP section of the input file. Not sure where I am...
I would like to write results to a .txt file through a subroutine, but can not find the code to include into my subroutine. Can anyone help? I have provide my current subroutine below. Thanks.
SUBROUTINE USDFLD...
