Hi guys,
I hope you are in the best of your health.
I am working on Lamb wave propagation in anisotropic composite laminates. I want to apply the non-reflection boundary conditions in the simulation model. I am expecting to avoid the reflections from the plate edge by using non-reflection edges. Any idea how it can be done in ABAQUS? Or any other way to avoid these unwanted reflections?
Thank you!
Saqib
Hello Dr M Sadeq Hameed : Here are a few links that would be useful:
http://www15.ovgu.de/ifme/l-numerik/quellen/Hosseini_2013_CompPartB.pdf
http://www15.ovgu.de/ifme/l-numerik/quellen/Ahmad_2012_Ultrasonic.pdf
https://www.researchgate.net/post/How_to_remove_Lamb_wave_reflection_from_boundary
In can only hope the above facilitates in your way forward!! Kind regards--
If you r performing harmonic (frequency) analysis, you can use PML parts in the extrémities of the plate. If the analysis is in time domain, you need to define your plate as long as possible to prevent the reflexions from extremities.
Laidoudi Farouk Sounds like good suggestion, I will try that. I am working in the time domain. Thank you!
Hi Saqib Hameed,
to remove reflections in transient simulations of Lamb waves, you can use an area with exponentially increasing damping. I modified the approach from Liu and Jerry
https://www.academia.edu/33475469/A_non-reflecting_boundary_for_analyzing_wave_propagation_using_the_finite_element_method
and used it successfully with CFRP structures. Unfortunately, my results are only published in German, but you can find equations, parameters and figures in section 4.2.5 of my thesis: Thesis Ultraschall-Plattenwellen in komplexen Strukturen - Ein Minimalmodell
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