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Either loss factor ηcE for elasticity matrix cE, or the loss factor ηsE for compliance matrix sE: required when Mechanical Damping is present. Both are dimensionless, the latter is valid only in Strain-Charge form.
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Either loss factor for electrical permittivity matrix εrS, or loss factor for electrical permittivity matrix εrT: required when Dielectric Loss is present. TBoth are dimensionless, the latter is valid only in Strain-Charge form.
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Either loss factor ηe for coupling matrix e, or loss factor ηd for coupling matrix d: required when Coupling Loss is present. Both are dimensionless, the latter is valid only in Strain-Charge form.
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Working with Materials and Piezoelectric Materials Library in the COMSOL Multiphysics Reference Manual.
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