Ansys Mechanical_Piezo Ultrasonic Transducers for Wire bonder or Dental scaler.

[@ngonhukhoa7756]

Hello Mr. Lee. I can't download the data from your drive included in download link (the files in wirebond_files directory). Can you give me the link to download them to study? Tks for your help!

[@jonghak.lee_simulation]

drive.google.com/open?id=1cWi8UJkfSnpLkGNMrObjSZ2FFtzbQ3MH&authuser=odumokgol%40gmail.com&usp=drive_fs

[@vishavjeetsinghyadav3850]

Hi lee, I imitate yo to build the model. Also shared the topology (Pos- 4, neg-3). But after solving i also got the negative values (+45......-45), Even the deformation of PZT are not in the opposite direction. Can you please suggest me that how can i get rid of this error.

[@shanuka_botheju]

Hi Mr.Lee I am struggling to model PZT-5H can you please upload a quick video of how to input data in engineering data and how to model PZT materials in ANSYS. My aim is to design an canteliver energy harvester using PZT-5H. Thank you

[@1574855]

Hello Mr. Lee. I am a student trying to simulate ultrasound transducers. Your videos are really helpful for those of us getting started - thank you for showing all the detailed steps! I was able to reproduce the speaker harmonic analysis only after watching your other video. It helped make the connection between Harmonic Response + Acoustics ACT vs. Harmonic Acoustics. I only have access to Ansys 2020R2 or I found that it doesn't always work with the acoustics ACT. I see you are using 2020R1 with Piezo and MEMS ACT. Have you had any problems with the Piezo and MEMS ACT not supporting the newer version of Ansys?

[@jonghak.lee_simulation]

Most ACT is developed by a common engineer. So the version update is late. When you use a different version of ACT, an error occurs sometimes. But the Piezo and MEMS ACT has simple code(Mechanical APDL commands). Do not worry. It works well on the latest Ansys version and we have no choice. Good luck~!! :)

[@1574855]

@@jonghak.lee_simulation Thank you!!

[@omerfarukkara753]

Hi Mr. Lee. First of all, thank you for sharing your work and for your detailed demonstration.I cannot access the Drive files you have shared.If possible, can you share it again? Thanks.

[@jonghak.lee_simulation]

drive.google.com/open?id=1cWi8UJkfSnpLkGNMrObjSZ2FFtzbQ3MH&authuser=odumokgol%40gmail.com&usp=drive_fs

[@DuXiao-me1pi]

Hello！Can ultrasound-assisted cutting be simulated with this model

[@jonghak.lee_simulation]

I recommend other s/w like as ls-dyna.

[@bochen4218]

Hello Lee, where I can get your materia library, I dont know how to define pzt, thank you

[@jonghak.lee_simulation]

drive.google.com/file/d/1T_SoURJ-W8m9lK6sUX9426H3JtYZ8mTs/view?usp=sharing

[@bochen4218]

@@jonghak.lee_simulationThanks for your reply, I have one more question, there are several pzt parts in the geometry model, they contact each other tightly. In your video and example， you use box select function to select contact faces(part V_negative and V_positive), actually you select two faces, but ansys shows one face has been selected, I imitate you to build a model, when I use the same way to box select face, ansys shows two faces have been selected, and continue follow your example, define the negative volt as zero, I get the negative volt in the end, can you please guide me how to select this face as one or how to modify my own model. Can you please tell me your email, I can send you my own example(use version 18.1).

[@jonghak.lee_simulation]

@@bochen4218 I made a share topology model in SCDM(or DM). The Share model has a 1 face between 2 pzt part so the V_Positive named selection has 4 faces not 8 faces. I thought your model does not share each part so you had to define the contact conditions. At this point, another problem has occurred. The contact condition has not volt dof. The Define Contact in the ACT menu tab, must define the volt dof condition into contact regions.

[@bochen4218]

​@@jonghak.lee_simulation thank you so much, I will try as you said.

[@adityaprakash619]

Sir please make a video on finding sound absorption coefficient in porous material ! Please sir

[@midhuncheruvathur6096]

Hai sir, I am currently solver pivot warning while doing the static analysis can you point me out the reason?

[@jonghak.lee_simulation]

I do not know without any messages of warning or error.

[@midhuncheruvathur6096]

@@jonghak.lee_simulation thank you jonghak lee can you share me paper on designing the front horn for the transducer?

[@jonghak.lee_simulation]

@@midhuncheruvathur6096 I found papers on Google search. www.google.com/search?rlz=1C1GCEU_koKR939KR939&sxsrf=AOaemvLe0V3agb0BBiN1KOduWzlmbuvi0Q:1641361092688&source=univ&tbm=isch&q=front+horn+for+the+transducer+ansys&fir=NFFz7HYrKKcYMM%252CwpVZ2cOlGpFDeM%252C_%253BBsYJphovxg7SQM%252CJ-OLvhiI-lxPiM%252C_%253B53zg1I6haZDhmM%252CwpVZ2cOlGpFDeM%252C_%253BD10Zb_mI0vU8TM%252C2AZqg9uZrtTGyM%252C_%253B1BDqPlETkk_8cM%252C-cGHNUcfUh5q9M%252C_%253BN0_gIL049xicTM%252CEJxexzhsa44cuM%252C_%253BhFzoT6X23dkVPM%252Cu2V1TGt3WLj85M%252C_%253BAckYc3h_5q6GaM%252CoVRoW_JhmmegCM%252C_%253B78bzePj62rA_9M%252C8ZOlyyNFDUZ7WM%252C_%253BwipFAhT0RozUUM%252CGo4ZeiaW4LbE1M%252C_&usg=AI4_-kSUxRcCFk8e0D5pfUK1TzeYf4xCIg&sa=X&ved=2ahUKEwj_qYLH8pn1AhVNZt4KHRbuAfIQ7Al6BAgMEA8&biw=1920&bih=937&dpr=1

[@midhuncheruvathur6096]

@@jonghak.lee_simulation Also can you reshare me the example and (Piezo and MEMS ACT) I can open the existing link

[@jonghak.lee_simulation]

@@midhuncheruvathur6096 Refer the video link. kzbin.info/www/bejne/aqaaqKSujKp4pZI

[@ДмитрийВяткин-ф2ф]

Hello! In the process of modeling the operation of piezoelectric elements, an error appears "The unit system of Command object(s) such as Static Structural>Commands (APDL) at the time of creation, differs from the solver unit system. Check your data and results accordingly." What could be the problem?

[@jonghak.lee_simulation]

The same system of units must be used at all analysis system. Is the message type error or warning? If warning, check notification of unit system in the Commands snippet.

[@ДмитрийВяткин-ф2ф]

@@jonghak.lee_simulation This error message!

[@jonghak.lee_simulation]

@@ДмитрийВяткин-ф2ф Is different the active unit and command unit?

[@ДмитрийВяткин-ф2ф]

@@jonghak.lee_simulation I have such commands: et,matid,226,1001 tb,piez,matid,,,0 tbdata,3,-5.2 tbdata,6,-5.2 tbdata,9,15.1 tbdata,14,12.7 tbdata,16,12.7 mp,perx,matid,729 mp,pery,matid,729 mp,perz,matid,635 and d,V_negativ,VOLT,0 units in Workbench: mm, kg, N, s, mV, mA. I am trying to repeat your lesson without the addition of PiezoAndMEMS. I have no add-on for Ansys Workbench 2019 R3.

[@jonghak.lee_simulation]

@@ДмитрийВяткин-ф2ф How much create analysis systems? 1 or 2 or 3 (Static Structure, Modal, Harmonic)? If 2 or 3, these analysis systems use the same unit system?

[@yakupemre1]

Hi Mr. Lee. This is a good tutorial, it is really helpful for me, thanks for that. Did you have a chance for manufacturing with such this analysis. I wondering either it match real model or not? Also you applied 1V for piezo crystal but we have seen V peak to peak 2V. How did it happen? Best regards.

[@jonghaklee]

Hi Yakup, I have no experience in manufacturing it. I just a software application engineer. However, our customers are trying to match it. The customers are faced a lot of problems with the material properties, parts assembly condition, damping ratio. In my video could not tell you about it so sorry. And then the 1V mean is polarized volt. It makes the electric field 0~1V in the PZT material through the thickness. In the Harmonic analysis(sinusoidal load analysis), the 1-volt load is applied -1~0~+1V so peak to peak volt is to be 2 volt.

[@yakupemre1]

@@jonghaklee Thank you so much. I appreciate your kindness in answering.

[@yakupemre1]

​@@jonghaklee Sorry Mr Lee. I have a one more question. In order to take a best results I want to use preload data from Static Structural on Modal and Harmanic analysis. But You did not this. How Can I add in my analysis this situations. Also, in the same time I dont want to add fixed or displacment support in modal or harmanic analysis. Because it effect them. Can You give an advice for it. I am really sorry for make you busy.