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I want to glue a piezo plate looking like in the image below such that the wide surface of the plate gets glued onto a flat surface. The image is part of the datasheet from here.

If I apply an AC voltage to the piezo plate such that it starts expanding and contracting along the flat surface it's sitting on, will the plate fall off?

I have no actual experience with piezo and wanted to see if gluing a thin piezo plate on a flat surface and have it expand parallel to the surface it's sitting on is feasible. The 2nd image below is what I want to achieve and I was wondering if it really does happen without changing the height (if it really does only move laterally)

(the 2nd image is from here)

enter image description here

enter image description here

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  • \$\begingroup\$ That's more of a mechanical engineering question then an electrical engineering question, isn't it? \$\endgroup\$
    – Marcus Müller
    Commented Aug 17, 2018 at 14:14
  • \$\begingroup\$ @MarcusMüller My apologies, I just edited my question. It may still be a mechanical engineering question but I guess now I'm asking how a piezoelectric shear actuator does move sideways without changing its height \$\endgroup\$
    – Blackwidow
    Commented Aug 17, 2018 at 14:16
  • \$\begingroup\$ a) these dimensions aren't to scale; nothing says it doesn't change its height in here (probably just insignificantly). b) Piezo crystals move by changing their crystal structure periodically; when changing a crystal structure, conservation of volume isn't a given fact. \$\endgroup\$
    – Marcus Müller
    Commented Aug 17, 2018 at 14:18
  • \$\begingroup\$ @MarcusMüller it wasn't, for which I apologize. \$\endgroup\$
    – Blackwidow
    Commented Aug 17, 2018 at 14:20
  • \$\begingroup\$ no need to apologize! \$\endgroup\$
    – Marcus Müller
    Commented Aug 17, 2018 at 14:20

2 Answers 2

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You probably need something like a flexible epoxy adhesive

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Yes the adhesive should be very low modulus and bond strongly. High modulus and strong bonding would also prevent falling off, but will also clamp the actuation. I have used single component PUR glue in the past which is rubber soft after curing. I suppose this could work well.

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