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Recent content by Margaria

  1. Margaria

    Damping properties of materials

    Hi WIN32, In my opinion damping ratio isn´t a material property or constant. Meanwhile there is a relationship between damping ratio of a structure and Young Modulus of the material. So when you say: "Because if I make a beam of steel and the same beam, but now of concrete, there is a...
  2. Margaria

    Effect of Strength on Corrosion Fatigue Performance

    Hi, The fatigue limit of a steel that was heat treated in order to obtain 1000 MPa (tensile stregth) can reduce 4 or 5 times if this material work in a corrosive environment. Margaria
  3. Margaria

    Noise on the automotive exhaust system

    Hi vozgul, A stainless steel mesh joint links two tubes. Friction of a tube (unalloyed steel) related to this joint causes noise on the tube. In thread384-64054, MAUI says: “Materials that are most effective at transmitting heat would also be appropriate for this application.” So, could I...
  4. Margaria

    Noise on the automotive exhaust system

    I am having an acoustics problem with an automotive exhausts system. Noise is caused by the friction between two parts of the system (not by the exhausts gas flow). I suppose that I’ll have good results if I reduce the tube’s diameter keeping the actual thickness. Could anyone comment my...

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