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  1. jdoggk40

    Fluid flow through a nozzle

    Thanks for the advice! I got the analysis to run shortly after posting. It turned out to be a problem with the mesh, as the outlet was extremely narrow. I added mesh refinement points to ensure two elements covered the width of the outlet. The analysis ran with no problem following this...
  2. jdoggk40

    Fluid flow through a nozzle

    Hello. I am attempting to perform an unsteady fluid flow analysis on a nozzle in Algor, but continue to get convergence errors. The nozzle has a .25 inch inlet on the top. The outlet is a 3.6" X .03" outlet on the bottom. I set the inlet at .02 m/s and the outlet is set as a prescribed...
  3. jdoggk40

    Using a constant time-step in MES (Algor V.16)

    Thanks for your response Garland. When the time step decreases with impact, the simulation gets to a point where it seems to almost stall. At times, if it gets too slow it will give an error for "overflow". I still get results but not all the way through the impact peak (max stress). I need...
  4. jdoggk40

    Using a constant time-step in MES (Algor V.16)

    Hey everyone, I'm back again with another question regarding a hip impact simulation I am running. I have what I believe is a pretty accurate simulation running, but the results are not correct. In Algor's results window I am comparing the stresses in the neck of the femur between different...
  5. jdoggk40

    Adding mass to femur model....

    Garland, One other thing that is important for me to determine is what the velocity of the model is at impact. I checked the velocity of nodes checkbox in the output settings before running the analysis. I think its supposed to write it to some output file? Is there a way to just track the...
  6. jdoggk40

    Adding mass to femur model....

    Alright, I gave those a shot, but I think the problem might be that I'm still on version 16.1, which doesn't seem to calculate internal forces (even when a probe is used). Reaction forces seem to only occur where the flesh contacts the impact plane. I'm going to try it with surface-to-surface...
  7. jdoggk40

    Adding mass to femur model....

    Garland, Sounds good, I'll keep playing around with the lumped mass feature. As of now, I'm playing around with a more "stripped down" simulation, just to see how close I can get without accounting for all of the forces and moments experienced at impact. You are right in saying I am missing...
  8. jdoggk40

    Adding mass to femur model....

    I am trying to simulate the femur falling on the floor while including the flesh around the hip and a hip protector outside of that. The femur is pinned at the distal end and falls similar to that of a pendulum, and impacts an "impact plane". The problem I am running into is adding mass on...
  9. jdoggk40

    Combining parts in an assembly

    Joining worked.... Im going to export as an iges or step and run a frequency analysis in algor thanks for the help
  10. jdoggk40

    Combining parts in an assembly

    Hello, I was wondering if anyone had any idea how to combine parts within an assembly. It seems to me that the only way to make one part out of two is within a part, not within an assembly. I figured there has to be a way to make all of the assembly parts one part for FEA etc. The combine...
  11. jdoggk40

    MES Analysis on a complex femur

    Should all elements be defined as "brick" elements? Choosing 3d kinematic only allows for the density of the material to be entered. Thanks, Jesse
  12. jdoggk40

    MES Analysis on a complex femur

    Yes, when I pinned it, I constrained translation in all directions. I just want the head of the femur to rotate around the pin at the knee end. It seems like the head will still move around as long as the rotational constraints are off. I'm not sure what you mean by constraining the two...
  13. jdoggk40

    MES Analysis on a complex femur

    Yeah. The license I was using is expired, and I don't think it is going to be renewed, so I'm out of luck on that end of things. -Jesse
  14. jdoggk40

    MES Analysis on a complex femur

    Hi everyone, I'm attempting to peform analysis upon the head of the femur by simulating impact on a hard surface. I am using an IGES model of the femur and a skin model that I created around the femur head. I attempted to pin the femur (at a node) in an upright position at the knee end, and...
  15. jdoggk40

    Creating a solid around a complex IGES femur model...

    I have a complex IGES model of the human femur, and I'm trying to surround it with an object (i.e. a cylinder) to represent the skin. The IGES part has two layers (an inner to represent bone marrow and the outer layer of bone) and I can not figure out how to combine a solid object with the...

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