Piezoelectric analysis

[An Pham]

Dear Community,

I see that LS-DYNA has a piezoelectric material analysis feature and a short introduction to it: https://lsdyna.ansys.com/wp-content/uploads/2025/02/control-systems.pdf

But other than that, I can't find any documentation or example problems for it.

Do you have any simple examples of this analysis?

Thanks and Regards,

[James Kennedy]

Dear An,

 

See if this provides some help.

Impact force refers to a transient phenomenon with a very short-acting time, but a large impulse. Therefore, the detection of impact vibration is critical for the reliability, stability, and overall life of mechanical parts. Accordingly, this paper proposes a method to indirectly characterize the impact force by using an impact stress wave. The LS-DYNA software is utilized to establish the model of a ball impacting the steel plate, and the impact force of the ball and the impact response of the detection point are obtained through explicit dynamic finite element analysis. In addition, on this basis, a correspondence between the impact force and the impact response is established, and finally, an experimental platform for impact force detection is built for experimental testing.

 

A Study on Impact Force Detection Method Based on Piezoelectric Sensing 

 

Jianli Liu, Chuang Hei, Mingzhang Luo, Dong Yang, Changhe Sun, and Ankang Feng

 

https://www.mdpi.com/1424-8220/22/14/5167#:~:text=Abstract,structures%20in%20actual%20engineering%20applications.

 

Sincerely,

James M. Kennedy

KBS2 Inc.

August 7, 2025

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[An Pham]

Dear James,

I tried a simple problem with parameters from this video: https://www.youtube.com/watch?v=PHNnyMxj7Vw

The object is fixed on the bottom side and subjected to a compressive pressure load on the top side. Ideally (as in the video), the result would be uniformly distributed horizontally and linearly varying in the direction of the load. But the LS-DYNA result is not so good and has a negative voltage value.

Result: https://drive.google.com/file/d/1lZH5brFg-GBhcO8PPN8P420YeY8PXbiw/view?usp=sharing

Do you have any suggestions to fix it?

Vào lúc 22:46:09 UTC+7 ngày Thứ Năm, 7 tháng 8, 2025, jmk đã viết:

[An Pham]

Dear jmk,

I tried a simple model with input parameters from this video: https://www.youtube.com/watch?v=PHNnyMxj7Vw

The object is fixed on the bottom side and subjected to a compressive pressure load on the top side. Ideally (as in the video), the result would be uniformly distributed horizontally and linearly varying in the direction of the load. But the LS-DYNA result is not so good and has a negative voltage value.

Do you have any suggestions to fix it?

Thanks and Regards,

Vào lúc 22:46:09 UTC+7 ngày Thứ Năm, 7 tháng 8, 2025, jmk đã viết:

Dear An,

[An Pham]

Dear jmk,

I tried a simple problem but the results are not good.

The body is fixed on the bottom side and subjected to a compressive pressure load on the top side. Ideally, the result would be uniformly distributed horizontally and linearly varying in the direction of the load. But the LS-DYNA result is not so good and has a negative voltage value.

Do you have any suggestions to fix it?

Vào lúc 22:46:09 UTC+7 ngày Thứ Năm, 7 tháng 8, 2025, jmk đã viết:

Dear An,