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Hello, I have convergence problem when using NLGEOM key word for a structural simulation of an elastomer submitted to large deformation. To try to identify the issue, I have simulated something extremely simple: A 3mmx3mmx30mm sample submitted to uniaxial tensile stress. One of the two small...

Hello, I am trying to model the deformation of a soft elastomeric cylinder, under the action of a compressive electrostatic force (i.e. electroactive polymer). To correctly model the situation, I should used couple physics, solve the electrostatic problem, compute the force, and then solve the...

Hello, This is a really dumb question, but I used to simulate membranes with an axisymmetric model (i.e. representing the cross section). For several reasons, I have now made a 3D model. According to PLNSOL documentation, I should be able to plot results (for example stress) of the membrane...

I am looking for a formula describing the natural resonance frequency of thin circular stressed membranes with a fixed edge. I know the formula for the situation without stress, which depends on the membrane's geometry and mechanical properties (Young Modulus, Poisson coefficient). I have found...

I have a simple question which is bothering me : If I take a clamped-clamped beam submitted to a uniformely distributed force, I can calculate its shape for a given force per unit length, as long as one stays with small deformation. Because the deflection at any position along the beam is...

Hello, I am performing nonlinear analysis, and sometimes, if elements get very distorted, a dialogue box appears saying something like : Some elements have become highly distorted(...) The simulation stops until the user press on OK. This is rather anoying if a batch of simulation is run, for...

Hello, I am doing coupled field electrostatics/structural analysis. It means that I calculate an electrostatic force, then the displacement of the structure due to this force. After that I do a mesh morphing to calculate the new electrical field and electrostatic force, and so on until...

Hello, I am trying to do couple physics using physics files. I calculate a force , and then apply it to a structural model with the LDREAD function. Then I recalculate the force using the new geometry and after that I need to re-run the structural analysis and so on until convergence is...

I have some trouble to simulate coupled field physics and I hope that you will be able to give me advices. What I am trying to do is pretty simple : I'd like to model an elecroactive polymer plate. It is simply a dielectric plate of elastomer whose top and bottom surface are made conductive. A...

Hello, I do have a question about using Ansys with a model made of different materials. I have a membrane which is on top of a frame. The membrane and the frame are made of different materials. So I defined the two materials models, selected the appropriate areas and applied the material model...