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51 points describing the motion thanks, chris

Hi all, I though I figured this out, but after the run, it is still displacing incorrectly I have described a displacement boundary condition on an analytical rigid surface that starts from 0,0 (time(s), disp(mm)) and ends up at 1,-5 using a tabular amplitude. The problem, is at the end of the...

nevermind, found the answer in a previous posting Thanks, Chris

Hi all, I have described a displacement boundary condition that starts from 0,0 (time(s), disp(mm)) and ends up at 1,-5 using a tabular amplitude. The problem, is at the end of the 1 second dynamic step, the displacement is -5.283 mm not -5.0 mm. Any idea why this is happening or what could...

can you offer any suggestion on how this would be done? Density in this case is varying spatially. Thanks, chris

Hi all, I need to express Youngs modulus and poisson's ratio as a function of Relative Density in ABAQUS Standard. Any ideas or insights on how to do this? Thanks, Chris

Martin, thanks for the reply. I am using the drucker-prager cap model for the material and i have read in the documentation that the import option may not be used for this model. Do you know anything about this? I have done the import and it completes successfully in standard, but there are...

Hi all, I have completed this first part of a forming analysis in abaqus explicit. In the first step a powder bed of 10mm is compacted to 3mm. the assembly consists of a die wall and top/bottom punches. Can anyone suggest how I can create a second step to determine the springback distance...

Hi all, I am running a modal analysis to extract the natural frequencies. When I plot the deformed shape the first 2 mode shapes appear as expected, but after that they are highly distorted and jagged. Any ideas as to what could cause this? Material properties? thanks in advance, chris

Can anyone clue me in on when to use the "Update Reference Configuration" option when creating a predefined field for the initial state? I am trying to get the resonance frequencies of the resulting deformed object. Thanks everyone Chris

Hello all, I am trying to impose a velocity boundary condition on an analytical rigid surface. I have set the time period to 0.0305 seconds, V2 to -100 (mm/s) and the Smooth step amplitude to (0,1; 0.0305, 1). I am trying to get a displacement for the rigid surface of 3.05 mm, However using...

Hello everyone, I am trying to transfer the material state at the end of a dynamic, explicit analysis (forming) to a standard static analysis (springback). I am using a modified drucker-prager cap model to account for the nonlinear effects. Is this possible? Also, if the static standard...

By the way, the data points for the lower spline must start from 0,0,0 as the upper points do...I think JavaFoil's order is the other way around Chris

Arxane, You need to create a sketch of the airfoil first. Before this though you need to format your data points. I use word pad...create separate data tables for the upper and lower splines. For example, X Y Z 0 0 0 1 0.5 0 and X Y Z 0 0 0 1...

ODB Field Frame Number 13 of 20 requested intervals at 3.250000E-01 10759139 3.266E-01 3.266E-01 05:26:28 2.642E-08 1110 1.335E-05 10815453 3.283E-01 3.283E-01 05:28:28 2.486E-08 150 1.683E-05 10871377 3.300E-01 3.300E-01 05:30:28 2.294E-08 1080...

Is there a way to add a spring to a compaction analysis and force the analysis to stop when the force in that spring is zero? This would happen as the part being compacted is allowed to relax. All that help on this forum are doing a great job and have taught me so much. Thanks! Chris

Hi all, I am in the process of learning to run an import analysis after a dynamic, in order to run a frequency extraction. The problem, is the dynamic step is so complex that the model must be axisymmetric. My question is, can an axisymmetric model be used for a modal analysis or can the...

Hi all, I am trying to display stress intervals for various time increments in a large deformation problem. I wish to fix the upper and lower limits for the contour values and show how the stress changes from start to end of the dynamic analysis. However, when fixing the stress contours from...

I am simulating a compaction process with a die/punch assembly. It is 2d axisymmetric. The die wall and top and bottom punches are analytical rigid bodies. I have added reference nodes to the rigid bodies and have assigned all boundary conditions to thses nodes. I have also defined a...

what if i do not have version 6.6-1...currently 6.5-3