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Simulation with large deformation beam
Posted 20.11.2018, 22:40 GMT-5 MEMS & Nanotechnology, Structural & Acoustics, Studies & Solvers, Structural Mechanics Version 5.4 1 Reply
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I am doing a simple simulation of large deformation beam. I made a 2D Al/Ox bimorph and apply thermal expansion with delta T = 300K. I should expect the bimorph would curve into a perfect arc.Just like the first photo.
With longer cantilever, it would curve into a circle. But the simlation tell me it will not.
It looks like the bimorph will just goes up without curve back. I think the simulation is not correct. I already try to use "Segregated" in the solver but it doesn't work. But how can I change the setting of the solver?
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Hi,
For large deformations, you must switch on geometric nonlinearity in the study settings, and ramp up the load using a continuation solver. See for example
https://www.comsol.com/model/large-deformation-analysis-of-a-beam-204
Regards,
Henrik
Henrik Sönnerlind
COMSOL