Elastic Properties of Auxetic Structures

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I want to calculate effective elastic properties of Auxetic unit cell using periodic boundary conditions implementation using structural mechanics module of Comsol.



4 Replies Last Post 24.10.2024, 14:06 GMT-4
Jeff Hiller COMSOL Employee

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Posted: 2 months ago 12.09.2024, 15:41 GMT-4
Updated: 2 months ago 19.09.2024, 09:40 GMT-4

Great. What's your specific question about your modeling of those structures in the COMSOL software?

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Jeff Hiller
Great. What's your specific question about your modeling of those structures in the COMSOL software?

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Posted: 4 weeks ago 23.10.2024, 14:03 GMT-4

Great. What's your specific question about your modeling of those structures in the COMSOL software?

Step by step guide would be helpful.

>Great. What's your specific question about your modeling of those structures in the COMSOL software? Step by step guide would be helpful.

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Posted: 4 weeks ago 23.10.2024, 14:04 GMT-4

Want to calculate effective youngs modulus and poisson ratio of auxetic unit cell

Want to calculate effective youngs modulus and poisson ratio of auxetic unit cell

Jeff Hiller COMSOL Employee

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Posted: 4 weeks ago 24.10.2024, 14:06 GMT-4
Updated: 4 weeks ago 25.10.2024, 15:01 GMT-4

Hello Navdeep,

To model an auxetic structures you follow the exact same steps as to model a non-auxetic structure (namely: draw/import the geometry, set up the physics, mesh, solve and post-process). Hence, you can get inspiration from any model in the Application Gallery showcasing a structural analysis, such as this one. In case you are just starting with the software and are looking for general training resources, I am including some suggestions below.

Once your model is solved, you will be able to determine the effective Young's modulus and Poisson ratio by relating them to the computed displacements and applied loads.

Best regards,

Jeff

Training Resources:

There are quite a number of resources you can draw upon to learn how to use COMSOL Multiphysics regardless of your specific application. I am mentioning here the main ones, in no specific order, and I should mention that this is not a complete list by any means. I hope it will prove useful to you nonetheless.

First, of course, there is the software's documentation. You can access it through the File > Help > Documentation menu or by browsing your COMSOL installation folder to the "doc" folder. The documentation includes both theory manuals and tutorial manuals. Many tutorial models are also available already set up inside the software via File > Application Libraries.

The COMSOL website also offers many video tutorials on a wide range of topics in the Video Gallery and worked-out models in the Application Gallery. You will also find longer archived webinars here. The COMSOL website also offer a Blog, in which many posts discuss how to simulate specific phenomena or using particular features of the software; they are highly technical and detailed.

COMSOL offers many instructor-led training courses.

Finally, and maybe most importantly, I strongly recommend the Learning Center videos to get a solid foundation for your modeling with COMSOL: they cover the entire process of setting up a model from start to finish, and are a great resource for self training.

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Jeff Hiller
Hello Navdeep, To model an auxetic structures you follow the exact same steps as to model a non-auxetic structure (namely: draw/import the geometry, set up the physics, mesh, solve and post-process). Hence, you can get inspiration from any model in the Application Gallery showcasing a structural analysis, such as [this one](https://www.comsol.com/model/bracket-structural-mechanics-tutorials-10314). In case you are just starting with the software and are looking for general training resources, I am including some suggestions below. Once your model is solved, you will be able to determine the effective Young's modulus and Poisson ratio by relating them to the computed displacements and applied loads. Best regards, Jeff Training Resources: There are quite a number of resources you can draw upon to learn how to use COMSOL Multiphysics regardless of your specific application. I am mentioning here the main ones, in no specific order, and I should mention that this is not a complete list by any means. I hope it will prove useful to you nonetheless. First, of course, there is the software's documentation. You can access it through the File > Help > Documentation menu or by browsing your COMSOL installation folder to the "doc" folder. The documentation includes both theory manuals and tutorial manuals. Many tutorial models are also available already set up inside the software via File > Application Libraries. The COMSOL website also offers many video tutorials on a wide range of topics in the [Video Gallery](https://www.comsol.com/videos?type%5B%5D=videotype-tutorial) and worked-out models in the [Application Gallery](https://www.comsol.com/models). You will also find longer archived webinars [here](https://www.comsol.com/events/webinars/archive). The COMSOL website also offer a [Blog](https://www.comsol.com/blogs), in which many posts discuss how to simulate specific phenomena or using particular features of the software; they are highly technical and detailed. COMSOL offers many [instructor-led training courses](https://www.comsol.com/events/training-courses). Finally, and maybe most importantly, I strongly recommend the [Learning Center](https://www.comsol.com/learning-center) videos to get a solid foundation for your modeling with COMSOL: they cover the entire process of setting up a model from start to finish, and are a great resource for self training.

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