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Recent content by Nataddrho

  1. Nataddrho

    Does anyone know the antenna factor

    Does anyone know the antenna factor of this loop antenna?
  2. Nataddrho

    Cubic void in center of sphere

    I don't have software. You can do it.
  3. Nataddrho

    Cubic void in center of sphere

    Your feeling of 10% reduction is valid, because a lot of the time "feel" from someone experienced is valuable, which is what that sounds like. Do you have the ability to run a simulation for me to verify? Nate
  4. Nataddrho

    Cubic void in center of sphere

    You asked this question twice so you must be curious. The void is actually a low hardness material, Shore 40A potting material. Comparatively it is negligible in compression strength. The sphere material is a thermoset that is molded and cured around the inner part for a specialized...
  5. Nataddrho

    Cubic void in center of sphere

    Moving target has come to rest. Final dimensions: Sphere radius: 71.25mm Cylinder radius: 18.75mm Cylinder height: 22.5mm Spherical material properties: Compressive strength: 40 Compressive modulus: 4000 Shock impact Charpy (Kj/m^2): 12 Hardness: Shore 90D Cylinder material properties: Air...
  6. Nataddrho

    Cubic void in center of sphere

    No. Cube length is 75% diameter of sphere. It will fit inside. What I want is something like this: eliminate corners as suggested. Here is a quick simulation I made using a cylinder void instead of a cube void, with a static compression test, and visually it shows that the stress distribution...
  7. Nataddrho

    Cubic void in center of sphere

    I want to know by how much the external compression strength is weakened by introducing a cubic void into the center of a sphere. I am an electrical engineer with a basic but not fully functional understanding of continuum mechanics, and I figured one of you guys could probably run a few quick...

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