Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Thermal/mechanical simulation of two layers: how can COMSOL 'seperate' them due to different CTEs?

Please login with a confirmed email address before reporting spam

Dear Community,

I am trying to simulate the following case with COMSOL 5.3a. I have a 2D design of a Si wafer, with a layer of SiO2 on top of it (as shown in the picture). I want to apply different temperature values and find out at which T the two materials start to seperate from each other due to different CTEs; hence it is a thermal-mechanical study case.

However, I do not know how can I simulate that with COMSOL; the program shows me how the two materials expand due to elevated T as a unity, there is no 'seperation' between them.

Any help is welcome. Thank you in advance.

Kind regards,

Dimitrios



2 Replies Last Post 2018年2月15日 GMT-5 05:21
Andreas Bick COMSOL Employee

Please login with a confirmed email address before reporting spam

Posted: 7 years ago 2018年2月15日 GMT-5 05:18

Dear Dimitros,

I would suggest you check out these two tutorial models:

https://www.comsol.de/model/thermal-expansion-in-a-mems-device-1870 https://www.comsol.de/model/mixed-mode-debonding-of-a-laminated-composite-19961

My impression is that a combination of these two could be an approach to the process you want to model.

Regards, Andreas

Dear Dimitros, I would suggest you check out these two tutorial models: https://www.comsol.de/model/thermal-expansion-in-a-mems-device-1870 https://www.comsol.de/model/mixed-mode-debonding-of-a-laminated-composite-19961 My impression is that a combination of these two could be an approach to the process you want to model. Regards, Andreas

Please login with a confirmed email address before reporting spam

Posted: 7 years ago 2018年2月15日 GMT-5 05:21

Hello Andreas,

thank you for the links! They seem really helpful!

Kind regards,

Dimitrios

Hello Andreas, thank you for the links! They seem really helpful! Kind regards, Dimitrios

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.