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  1. Throwawaynerd

    Orthotropic Properties of PZT

    The formulas to calculate unknowns are available in research papers. What I meant was if someone had written a script for those formulas. So I would just need to insert the known values from the datasheet for different materials to extract the unknown values for orthotropic properties. I am...
  2. Throwawaynerd

    Orthotropic Properties of PZT

    Hi all, I am designing ultrasonic transducer in Abaqus. I have difficulty in defining orthotropic properties of the PZT. Since, the supplier datasheet does not contain much information about orthotropic behaviour of the PZT, therefore I need to find it by myself. I am writing here to seek help...
  3. Throwawaynerd

    Mises Maximum in Frequency Analysis

    Dear FEA Way, My bad, I did not explain my case explicitly. Thank you for the input. Being normal is a gift to some, others put tremendous amount of energy to be normal.
  4. Throwawaynerd

    Mises Maximum in Frequency Analysis

    Dear FEA Way, I am performing Harmonic Analysis using Steady State Dynamic, Direct approach. Do the stresses and displacements bear any meaning unlike in the Modal Analysis? If it does not, then what exactly it tells us differently from Modal Analysis? Thanks
  5. Throwawaynerd

    Mises Maximum in Frequency Analysis

    I am designing ultrasonic transducer. While performing frequency analysis, in the field output request I set MisesMax but when the analysis starts it gives me this warning "Output request misesmax is not available for this type of analysis". I do get mises equivalent but misesmax equivalent does...
  6. Throwawaynerd

    Affect of Adjusted Nodes on Results

    Dear FEA Way, That's true, these are warning messages rather than errors. But I am just wondering that would these warnings affect the results of simulation and can the results be trusted with these warnings? Thanks,
  7. Throwawaynerd

    Affect of Adjusted Nodes on Results

    I keep receiving this error in the Modal and Harmonic analysis of the design. "THE ELECTRIC POTENTIAL WILL NOT BE CONSTRAINED FOR CONTACT PAIR (General_Contact_Faces, General_Contact_Faces)." I have same potential, i.e., zero, during Modal Analysis and different potential across PZT during...
  8. Throwawaynerd

    Affect of Adjusted Nodes on Results

    There is a gap but that is because of electrodes. As in actual design, the bolt and electrode will be insulated but I did not consider insulation in the current design, and I think it won't affect the results much. These warnings now appear only in the static general step where bolt load is...
  9. Throwawaynerd

    Affect of Adjusted Nodes on Results

    Hi all, I am designing ultrasonic transducer in Abaqus. I am performing modal analysis and I encountered the following Warning message (560 nodes have been adjusted. The nodes have been identified in node set WarnNodeAdjust) during Data Check before submitting my job. I checked the mesh...
  10. Throwawaynerd

    Design of Ultrasonic Transducer - Numerical Singularity and Negative Eigen Value Warnings

    FEA Way, thank you for your time and input.
  11. Throwawaynerd

    Design of Ultrasonic Transducer - Numerical Singularity and Negative Eigen Value Warnings

    There is no mechanical displacement besides the excitation of PZT stacks that is generating mechanical vibration. When I play with the mesh, this numerical singularity is appeared at some other location. Like in my previous model of the same design but with different mesh has a numerical...
  12. Throwawaynerd

    Design of Ultrasonic Transducer - Numerical Singularity and Negative Eigen Value Warnings

    I have electrical potential for the PZT material and Tie constraint between the bolt and front mass of the transducer.
  13. Throwawaynerd

    Design of Ultrasonic Transducer - Numerical Singularity and Negative Eigen Value Warnings

    Hi all, I am designing ultrasonic transducer in Abaqus. I have performed modal analysis on the model and now I am performing harmonic analysis. During modal analysis I got several warnings of Numerical Singularity at different nodes of the bolt but in the subsequent iterations those warnings...

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