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  • Users: jongyonkim
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  1. jongyonkim

    Discrepancy between Shell and Continuum elements

    Hi, With ABAQUS/Explicit, I'm modeling the mechanical bending behavior of a 100mm x 100mm x 0.5mm flat sheet of Silicon. I apply the force in the center and see where it breaks (when Mises stress = yield stress). Since the plate is sufficiently thin relative to other dimensions, I decided to...
  2. jongyonkim

    ALLWK dependence on pulling speed

    Hi, With ABAQUS/Explicit, I'm performing a force vs displacement measurement of a 100mm x 100mm x 0.5mm Silicon wafer (applying BC of velocity in the center, wafer sitting on frictionless "square ring", wafer slips down through if displacement is too high). Use the following to extract the...
  3. jongyonkim

    Importance of Material Properties

    Hi, I'm simulating the bending of a sheet of (amorphous, poly)silicon of ~300um in thickness. Currently, I have the following material properties density young's modulus poisson's ratio I consider 2% strain the breaking point (my definition of "damage"), which can be obtained from LE...
  4. jongyonkim

    Force vs. Displacement calculation

    Hi, I am trying to model the force vs. displacement behavior of a thin sheet of silicon. The four corners of the square sheet are fixed using a boundary condition (U1=U2=U3=0). I am to apply a point load in the center. I would like to obtain a graph of this load force vs. downward...
  5. jongyonkim

    Defining Contacts in 2D plane

    Hi, I'm running ABAQUS/Explicit. My structure is basically a 2D circle (solid, homogenous, element cps4r) with two "1D line" arms (beam, element B21)coiling around the circle (like an eye of a hurricane). I would like to define a "Rough" Interaction Property (No slip) contact between the arms...
  6. jongyonkim

    Force vs. Displacement data for a Flat Spring

    Hi, I'm running a simulation of unrolling a flat spring made of silicon to obtain the system's reaction force (spring force) vs. displacement graph. See the picture at : http://i102.photobucket.com/albums/m97/jongyonkim/flatspring.jpg...
  7. jongyonkim

    Force vs. Displacement data for a Flat Spring

    Hi, I'm running a simulation of unrolling a flat spring made of silicon to obtain the system's reaction force (spring force) vs. displacement graph. See the picture at : http://i102.photobucket.com/albums/m97/jongyonkim/flatspring.jpg...
  8. jongyonkim

    Simulating microstructures in a reasonable time frame

    Hi, I'm considering ANSYS to simulate stretching of a silicon coil that measures 2um~200um (micron) for my lab. It should be a 3D model with at least 10,000 nodes. Has anyone tried running micron-scale simulations with success? Can ANSYS run such a small-scale simulation in a reasonable time...
  9. jongyonkim

    Terribly slow computation time for silicon microstructures...

    Hi, I'm using ABAQUS/Explicit to simulate stretching of a silicon coil that measures 2um~200um (micron) for my lab. I made the structure with part size "200" for 200um, which translates to 1 unit = 10^(-6)m. I also made appropriate scaling to density and Young's Modulus. Density : 2.329E3...

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