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How to restrain only the electrical displacement in the y direction in a piezoelectric module
Posted 2020年1月17日 GMT-5 03:31 Piezoelectric Devices, Structural & Acoustics, Equation-Based Modeling Version 5.4 3 Replies
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dear！ I am doing a subject of piezoelectric beams subjected to lateral forces,and i want to constrain electrical displacement only in y direction,but in comsol i find i need to constrain both x and y direction,like the graphic in annex，can you tell me how to solve it?
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Do you mean mechanical displacement?
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Do you mean mechanical displacement?
no,i mean 'electric displacement' in the piezoelectric module,and it's symbol is expressed as Dx
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Hi,
This boundary condition is not a 'constraint'. Mathematically, it is a Neumann condition ('flux condition'). Thus, the value zero is the same as not prescribing it at all.
Regards,
Henrik
Henrik Sönnerlind
COMSOL