uniaxial compression test
uniaxial compression test
(OP)
Hi all, I'm tryin to model with FeBIO (a FEM open source software) an uniaxial (force driven) compression test, on a specimen of muscle (modeled as a Mooney Rivlin material).
My specimen is a cube of 100 mm x 100 mm x 100 mm, laid on a plate (rigid body) and with the load applied by an upper plate (rigid body too).
I've problem with instability (i added contact conditions between the bottom face of the cube and the bottom plate, and with the top face of the cube and the upper plate) and a BC of 0 displacement in Z direction for the bottom plate of the cube, but it's not enough because the cube could translate and go away during the analysis, but if I lock the X and Y of the faces, obviously the cube couldn't expand under compression.
So, because the way to do, is not different from Abaqus, what other BC i've to apply to have a realistic solution?
My specimen is a cube of 100 mm x 100 mm x 100 mm, laid on a plate (rigid body) and with the load applied by an upper plate (rigid body too).
I've problem with instability (i added contact conditions between the bottom face of the cube and the bottom plate, and with the top face of the cube and the upper plate) and a BC of 0 displacement in Z direction for the bottom plate of the cube, but it's not enough because the cube could translate and go away during the analysis, but if I lock the X and Y of the faces, obviously the cube couldn't expand under compression.
So, because the way to do, is not different from Abaqus, what other BC i've to apply to have a realistic solution?





RE: uniaxial compression test
Quando Omni Flunkus Moritati
RE: uniaxial compression test
Rob Stupplebeen
www.optimaldevice.com
RE: uniaxial compression test
I've got to say I think you are exploring friction more than the elasticity and poissons ratio of the material.
Cheers
Greg Locock
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