in the flexural 3PB test, a concentrated displacement load would be applied to the top middle point of a beam. For modeling one-half of the beam using symmetry, which nodes or edges do you think should the roller and load point be assigned to avoid coincident of the BCs and errors relating to stress concentration in a nodal load point (after meshing, image attached)? is it not a better idea to assign the displacement load directly to the whole side edge using these BCs ( U1=0, U2=Value, U3=0, UR1=0, UR2=0, UR3=0)?
any idea would be appreciated.
kindly tell me the scope of research in computer virus model with stochastic term and what are the limitation.
I totally agree with Claudio.
I let you a video of a 3pb panel test simulation in ANSYS, it is for composite panel but you can see the idea applied to your case:
https://www.youtube.com/watch?v=yQcegBOHjxQ&ab_channel=LEAPAustralia
thank you for your answers...
in the case of avoiding stress concentration due to the point load application, would you recommend assigning the point load to a set of small mesh points instead of one node (attached image to the thread)?
dear Claudio Pedrazzi
thank you for your answer,all these tricks are done for simplifying the model and to keep the number of surface contacts as low as possible (there are plenty in my case), also the exact E-Modules of the roller of the machine is not available.
As you said, applying the symmetry conditions to the side edge and the load to the top node may work.
your answer helped...
I will be following other ideas on this issue
God bless
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