Search results for query: *

Here is a figure of the strange viscous dissipation values: http://files.engineering.com/getfile.aspx?folder=4daa0ba3-933a-4539-8219-d6ed31116450&file=Energy_Output-RUN-1_PNL_CONTACTDAMP.png Thanks...

Hello, I am interested in studying energy dissipation under impact loading. To start, I created an axisymmetric model similar to the example problem pl3d_erode_ale (where a rigid projectile impacts a plate, deforms it, and then bounces back) and gave the plate LINEAR ELASTIC properties. When I...

Hi, I am modeling creep indentation of a material with a rigid flat punch modeled as a rigid analytical surface, and the analysis doesn't converge if I apply the load right away (as also discussed in thread799-293302). Instead I tried displacing the indenter by a small amount (step 1) to bring...

Hello all, I am interested in modeling high strain rate impact of a fluid filled porous structure. Previously I always used Abaqus Standard since I wasn't studying "impact". For this analysis Abaqus standard has the *soils card with which the coupled displacement-pore pressure analysis of a...

An additional note: All the ARRAYS in general are zero-valued in USDFLD when I write them to .dat file: CALL GETVRM('SINV',ARRAY,JARRAY,FLGRAY,JRCD, $ JMAC,JMATYP,MATLAYO, LACCFLG) C stress invariants (MISES, TRESC, PRESS, INV3) JERROR = JERROR + JRCD...

Hi, I am trying to use some quantities in my UMAT such as pore pressure, strain energy, coordinates, etc., so in order to get access to them I am using USDFLD which calls GETVRM to get those values at the integration points, and assign them to solution dependent state variables STATEV. But these...

Hi there, I had posted a similar question before but I stoped working on this problem and now I'm back to it and stuck with the same issue!! I hope some one can help with this. I have written a UMAT for a time/stress adaptive material. In my UMAT I derive the elasticity tensor, stress, etc...

Hi there! I have a strange problem with switching boundary conditions between step 1 and 2 in ABAQUS/standard. Here is a quick description of what I'm trying to do: Imagine two objects with one being made of a soft material enclosing the other which is made of a different material (like a fruit...

Hi! Has any body ever had to deal with a similar problem as follows? I have two stl files, one is of an object in an unstressed state, and one is of the same object after some deformations were applied to it through manipulation by some unknown forces. I need to find the resulting stress field...

Hi everyone, I have a hollow object which is filled with another material in its cavity. I would like to model contact between the outer surface of the cavity and the inside of the outer object (TIED contact in ABAQUS). I am using Patran for pre-processing but I can't figure out how to pick the...

Hello, I wish to apply BCs to a surface that I have defined in ABAQUS. I would like to constrain each node in this node set in the direction of the normal to the surface at that point. Does any one know if there is a way to do this? Obviously it wouldn't make sense to define a new local...

Hi Onda, thanks for your response :)

Hi francoislambert11, thanks for your response :)

Hello! I have several parts in stl format which I can assemble together using either Geomagic or Pro/E. I wish to import these geometries into Patran and define the contact between each of the two parts. The ultimate goal is to run the model in ABAQUS. I don’t have the license for the Pro/E –...

Hello, I have some geometries in STL and IGES format that were created using a medical image procesing program from MRI scans. Patran does not recognize them as solids so I can not do a solid mesh. How do you get around this problem? Thanks!

Hi, I am trying to plot stress vs. strain values in ABAQUS CAE but ABAQUS keeps plotting them versus "time". How can I choose my own X axis? I don't seem to be able to figure this out even though it must be very trivial!! I will appreciate your help!! Thanks :)

Hi Paulis, Can you tell me how you extract a text file from ABAQUS? The need just came up and I was trying to use Fortran to read the results but if they can be written to a text file which can be read by Matlab then that will make life so much easier!! Please let me know! Thanks :)

Hi, I am trying to model a stress relaxation experiment in ABAQUS. I am using cartilage material in the test and for modeling that I am using the soil analysis. The displacement of the indenter for each step is a ramp rising at constant velocity for t0 seconds and then constant over some...

Hey guys, thanks for your replies. Okay, so I have a very simple question so don't laugh at me because I am not too good with Pro/E. How do you cut one object into two parts using a surface, so that you can save the two resulting pieces separately? What I am trying to use is Sweep/Cut. But Pro/E...

Thanks for your reply, but that is not free anymore apparently. What I am trying to do is import my parts into Pro/E as a solid so that it is easy to manipulate. I have been working with STL's so far, but now I need to cut one object into two parts using a cutting surface and save them as two...