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Geometric Non linearity doubly clamped beam
Posted 30 oct. 2016, 17:17 UTC−4 0 Replies
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Currently I am working on determining the nonlinear force displacement relationship of a thin doubly clamped beam with a central tip mass. I use a parametric sweep with a point load in a stationary study to generate my force displacement relationship
My question is, for the geometric nonlinearity included in my stationary analysis will this include the effect of the central tip mass or the beam only? When I put together a cubic stiffness curve fit after my simulation I notice when I run it with and without the mass I get very similiar cubic curve fits ( I expect they are only slightly off due to a small reduction in the mesh with the added mass sections at the centre of the beam). Does anyone know if geometric nonlinearity includes the effect of the tip mass, from what I saw in the solid mechanics user module it only uses strain without any inclusion of mass, is this correct?
I am using COMSOL 5.1
your help is most appreciated in this matter
kind regards Tanju
Hello Tanju Yildirim
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