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Hi, I know Abaqus reports engineering strain (i.e., nominal strain, or "NE"), and log strain ("LE"). but I wonder if it reports Lagrangian strain as well? I tried to search its documentation, but didn't find any relevant information. Just for comparison, LS-DYNA, another FE software package...

Hi, I have enough Abaqus/Explicit tokens to run in parallel with 16 CPUs. However, it just quits after running package.exe splitting the job into 16 parts (spitting out 16 .pac, .sel, etc. files), writing the 'stable time increment' info in the ".sta" file. And then it just quits with error...

Try use a pure master-slave surface contact definition (with "weight" parameter). I think by default it uses a hybrid, i.e., 50% of each surface.

Hi, I need to model a membrane in an assembly, and the membrane need to have certain pre-tension. Can anyone provide any tips how I can apply the initial pre-tension in the membrane elements? Would "pre-tension" option work? Or "Initial condition, type=stress"? Which one is appropriate? Thanks...

Hi Rob, Thanks for your reply -- unfortunately, I do not have a CAE file to show what it looks like as I generate Abaqus input files directly without using CAE. The question is more of a generic in nature -- I know when implementing the finite element code for analysis, it's actually quite...

Hi, I am simulating a rigid body compression against a soft material. I need to report the contact reaction force. I tried to output "RF" and "TF" for the rigid body node set, but when I visualize them in Abaqus CAE, all values are zero. This is puzzling to me. Can someone tell me how I can...

Thanks for the tip, but that's not the case for me. I don't really have contact definition involved -- all I need is to specify that the nodes on the outer boundary can only move tangentially, but not in the normal direction.

Hi, I have a curve-shaped object that I am modeling to have the boundary nodes fixed in the surface normal direction, while allowing tangential movement. How can I specify such a boundary condition then? I looked up "*TRANSFORM" keyword, but it seems that the local coordinate system is very...

Not sure how to read at nodal values. If you are trying to interpolate based on nodal position and values, will you be able to read values at integration points and use the element centroid?

OK, I tried to use numerical method to evaluate all those partial derivatives. What I found out was interesting: the strain values are very close to (but not exact with) what Abaqus reported when at the beginning of deformation. The discrepancy became larger and larger when I calculated strain...

I didn't open your CAE file ... but you should be able to define mass scaling in your input file directly?? For example, the following: *FIXED MASS SCALING, TYPE=BELOW MIN, DT=1.0E-7 OR: *VARIABLE MASS SCALING, TYPE=BELOW MIN, DT=2.0E-7, FREQUENCY=10

Appreciate your help! I have actually already came across the links. I know how to generate the strain tensor in a rotated coordinate system (also a Cartesian one), but just don't know how to apply the rules found in the second link to derive the strain components in the cylindrical coordinates...

Hi, This may not be directly related to Abaqus CAE or Abaqus. But I was hoping to generate the strain tensor in a cylindrical coordinate system, and need some help. I was able to use Python to read the 6 NE components from Abaqus odb file after Explicit run. I was also able to construct the...

I am simulating a very simple problem using Abaqus: suppose a spherical solid of gel is enclosed within a rigid sphere of the same radius. The sphere was modeled as a membrane element but with thickness of zero. The interface between the spherical solid and the sphere is a frictional contact...

Hi, Could someone tell me what is the name of the variable for mechanical pressure in a dynamic, explicit simulation? Sorry that I searched the Analysis manual but did not find anything similar to what I need. Thanks! In addition, I see "ERV" is volumetric strain rate? Could someone elaborate...

Hi, Anybody knows how to set up Labview on one machine to initiate command to be executed on another machine? If required, we can have labview on both sides. thanks.

Hi rtmpxr, Thanks, but the link doesn't work??

Dear all, I am modeling something using hyperelastic material model. Could someone tell me how to define the material failure? I looked up in "failure tensile; shear failure" etc., but they only apply for either plastic or elatic. Does abaqus support material failure model for the...

Or, maybe you can output and read the S11 and S22 variables and do the difference by yourself using an external program.

Thanks for both of you, even for the criticism. But sometimes if it's something trivial for you, others may have trouble understanding it, not because he/she doesn't have the basic knowledge or is incompetent, but may simply because of being unfamiliar with the terminology. Regardless, still...