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  1. TennisGuy543

    Proportional Damping Coefficients for Aerospace Aluminum in Landing Gear Analysis

    Hi - I'm constructing a FEA model of a landing gear for a drop test via ABAQUS. How do you determine/find data on the Rayleigh Damping coefficients for an aluminum structure, specifically a skid landing gear. After assessing my simulation, it's clear that I need to include damping in my FEA...
  2. TennisGuy543

    Proportional Damping Coefficients for Aerospace Aluminum in Landing Gear Analysis

    Hi - How do you determine/find data on the Rayleigh Damping coefficients for an aluminum structure, specifically a skid landing gear. After assessing my simulation, it's clear that I need to include damping in my FEA model - but I do not know how to obtain the proportional damping coefficient...
  3. TennisGuy543

    Using matplotlib for Abaqus-Python

    I am wondering if any of you use matplotlib for your python codes that are coupled with abaqus. I really want to load matplotlib onto the abaqus-python interface. I'm using abaqus 6.12, which has python 2.6. Also, I'm using Windows 64 bit. However, when I download the matplotlib for python...
  4. TennisGuy543

    Ramp loading in dynamic/explicit analysis

    Hello everyone, I have limited experience with abaqus. Previously, I would use a static analysis and apply loads in the ramp format. Now I'm doing a dynamic/explicit analysis, and I cannot find the ramp feature. How do you apply a ramp load in dynamic/explicit analysis? With static...
  5. TennisGuy543

    Python script that documents the max stress of a simulation?

    I was wondering if it is possible to write a python script that locates the maximum stress in a simulation where the stress distribution varies with time and position. Basically I am writing a parametric simulation. Many geometric parameters (length, thicknesses, radii, etc) can be varied...
  6. TennisGuy543

    MS in Engineering or Law School?

    I am finishing up a BS in Aerospace Engineering from a U.S. university and trying to decide whether to go for an MS in AE or go to Law School. My questions are below. Which degree (MSAE or JD) yields a higher salary? What is the better career path - engineering or law? In general, which is...
  7. TennisGuy543

    Contact between 2 objects ignored when deformation scale factor is increased. Why?

    I'm modeling a contact problem by applying force to a reference point on a rigid joint, which is in contact with a deformable leg component. I set up a surface-to-surface interaction and input a load to the reference point on the joint. In general everything works as I would predict; the force...
  8. TennisGuy543

    Making my simulation converge by increasing the damping coefficient. Is there a better way?

    Hi everyone: I have been running a contact simulation that has had convergence problems. I was getting the error message: Convergence judged unlikely. In order to make my simulation converge, I have been increasing the damping coefficient to a very large number. I have went to Interaction...
  9. TennisGuy543

    Moving constraint and or moving load: Can it be done? How?

    IceBreakerSours, Thank you. You're post makes sense and is consistent with other research I've been doing on this. I prefer option 1. I understand that option 2 is a good brute force was of applying the moving pressure to the rod, but I have limited experience with FORTRAN. However, I now...
  10. TennisGuy543

    Moving constraint and or moving load: Can it be done? How?

    That is indeed part of what I want but I want the pressure moving with respect to time also. So, I have the pressure's amplitude and location change with time. A physical example would be modeling a road with tires moving on top of it, which causes a moving pressure. Except now the...
  11. TennisGuy543

    Moving constraint and or moving load: Can it be done? How?

    Any ideas? Surely someone has had to model a moving pressure before. I was wondering if there is a common method on how to do it. Could I prescribe a pressure over the entire object being analyzed, then implement a "user-defined" pressure distribution such that the distribution is 1 at the...
  12. TennisGuy543

    Assigning a reference point to a rigid part in ABAQUS

    hello, I am running a simulation in which one of the parts is a rigid body. I have a quick question regarding the defining of reference points. Basically, when I try to run my job, I get an error message saying "The rigid part instance Part-4-1 is missing a reference point". It makes sense...
  13. TennisGuy543

    Moving constraint and or moving load: Can it be done? How?

    And thanks in advance!
  14. TennisGuy543

    Moving constraint and or moving load: Can it be done? How?

    I have bar that extends in and out of a socket. At the contact points between this socket and rod, a moment and forces are induced. We do not know exactly how the moment/forces are imposed onto the structure, we just know the area of contact, its magnitude, sign, and time-variation. I want to...
  15. TennisGuy543

    Common method to apply loads on ABAQUS

    I am beginning to run FEA simulations, and I am wondering the most common way to apply loads to a structure in ABAQUS. I see that concentrated loads are the 1st option on ABAQUS, but clearly this will yield an erroneous stress field across the solid since the point load is unrealistic and will...

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