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  • Users: vonlueke
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  1. vonlueke

    PVC pipe absolute roughness

    What is the typical absolute roughness, in mm, of typical PVC pipe having an inside diameter of, say, 15 to 75 mm? Thanks.
  2. vonlueke

    Interpreting raw strain gauge output

    Let's say you have an axial foil strain gauge attached to a steel part, and the test load on the part (loaded far below yield) is cycled from zero to 100% three times while the strain gauge output is recorded. You can therefore plot the strain gauge output (raw microstrain versus percent load)...
  3. vonlueke

    Rectangular tank drainage time

    Could someone please advise me on how to calculate tank drainage time for a tank-full of still water in a large, relatively shallow, rectangular, open tank having a circular drain hole in the bottom (or direct me to the correct forum or thread)? (The eng-tips search function doesn't work, in...
  4. vonlueke

    "PAN-Bronze 220" shear strength

    Could anyone tell me the ultimate shear strength of a metal alloy supposedly called "PAN-Bronze 220"? This might be a name used in Germany. Or it might also be called "AlMBz. 220." I'm pretty sure the tensile ultimate strength is 650 MPa. The tensile yield strength would...
  5. vonlueke

    Beam element stiffness matrix with pin releases

    Does anyone know which MSC NASTRAN card outputs the element local stiffness matrix for a single CBAR (12-dof) beam element? I have a 12-dof beam with some pin (dof) releases and need to run a simple test problem to check the element local stiffness matrix, to compare to some calculations in...
  6. vonlueke

    Rafter load sharing

    Let's say a single, concentrated load P is applied to one rafter (upper chord) of a wood truss roof (near that rafter's midspan), rafter spacing is 16 inch on centers, rafters are 2x6 No. 2 southern pine, roof is typical asphalt shingle, and assume typical residential roof sheathing (panels)...

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