Piezo SHOCK Show #16: How can you calculate the voltage generated on a piezo bender with FEA?

Welcome to the Piezo SHOCK Show #16. Piezo benders work quite well for generating decent voltages from small forces. In this video, I describe how to calculate voltage on a piezo from bending stresses calculated from FEA, specifically a Fusion 360 simulation. In the example, 81 volts were generated from 10 N of force.

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[samarthsachan]

Please make a video on how to measure the blocking force of the piezo stack actuator experimentally. What type of sensors should we use??

[ricksampson]

In a future episode, can you please discuss the theory, operation and applications of piezo transformers, thankyou.

[klave]

Young’s modulus is for a thin wire, is the use in FEA constrained to Young’s modulus or could/should you be using bulk or flexural modulus? I often see Young modulus in material data sheets, is there a simple relationship to convert it to bulk modulus or the reverse?

Ok, I asked the question without looking it up, I searched for the conversion, simple conversion formula using Poisson’s ratio. Can also do shear modulus conversion.