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  1. mdhayes

    MAT2/MAT8: question non answered.

    Airmail, Why not just use membrane elements with a MAT2 entry? When NEiNastran calculates the MAT12 (solid) entries, it scales/normalizes them as follows: MAT2 ID2 matrix =[A]/t where t is the laminate thickness MAT2 ID3 matrix = [D]/t/(1/12*b*t^3) MAT2 ID5 matrix = [B]/t^2 It may be the...
  2. mdhayes

    Composite material - E1 of the composite material

    Vladimir, Set KEYOPT(10)=1 to output the reduced stiffness matrices to the output window (or file). Sorry for the late response...You probably already figured it out. Michael Hayes, Ph.D. Stress Engineering Services, Inc. michael.hayes@stress.com
  3. mdhayes

    finite element modeling of isolator

    Thanks for the help guys. I've been reading through the ANSYS and ABAQUS help menus and through Harris's shock and vibs handbook, so I'm starting to "get it" now.
  4. mdhayes

    finite element modeling of isolator

    Thanks Greg, but I also need to capture the damping effect of the rubber used in the isolator. I'd like to represent the isolator as a sping-dashpot element, but I need to figure out how to calculate the dashpot parameter.
  5. mdhayes

    finite element modeling of isolator

    I'm performing a harmonic vibration analysis (FEA) on a structure. There is a component mounted to this structure via isolators. I have the specifications for the isolator, which includes a static load rating at a give deflection and a ratio of dynamic and static spring rates. How can I use...
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