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  1. Kottier

    Linear Buckling and shell91

    I'm going to find out why they thick so in a few days, there's a meeting scheduled. But I hoped that some-one could tell me, if doing a linear buckling analysis with shell91 is inreliable or not.
  2. Kottier

    Linear Buckling and shell91

    Hi, I'm doing an linear buckling analysis on a composite turbine blade. Now the certification organisation states that the use of the layered shell91 element, does not result in reliable values. They advise the use of shell181 in order to obtain reliable results. Now am I aware of the need to...
  3. Kottier

    Contact Manager

    I believe, that there has to be an unmeshed area, that can be pointed as a rigid target. Thus yout target has be unmeshed in order to be rigid.
  4. Kottier

    Tsai-Wu

    After spending much time in the Ansys help, I'm not able to find anything about specifying the Tsai-Wu failure criteria. Ansys help describes that there are 3 pre-programmed failure criteria, stress/strain/Tsai-Wu. But I cannot find the way to specify that I want to use the Tsai-Wu criteria. Can...
  5. Kottier

    Tapered shells

    Hi, Im modeling a nacelle cover of a windturbine, using layered shell-elements. Now I how to model some stiffeners in the nacelle, and want to have a nice transition from the plates to the stiffeners. In practice this is done by using tapered foam between the layers. Now I've tried to model this...
  6. Kottier

    Pre-tension

    Thanks Drej, I hoped it would save me a few iterations, so that's great. Only one question remains for me, what causes the need for iterations. Why does the bolt-force change when the temp method is used, is it because the deformed shape of the bolt changes the shrinkage. Or are their other...
  7. Kottier

    Pre-tension

    I'm modelling a bolted flange and have to pre-load the bolts. In the past I used temperature dependent properties in order to obtain an specific pre-tension force. But I've read something in the help about specific pretension elements. Are they easy to use or would it be wise to stick with the...
  8. Kottier

    Mapped meshing of Two Rectangular Plates Connected by Fillet

    1) Try slicing your model, in order to obtain geometry that's suitable for mappep meshing. 2) Try sweeping.

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