horizontal stiffness about 2D elastomeric bearing element

[linzhidan]

Dear vesna,
i have construct a rubber bearing using 2D elastomeric bearing element.
my purpose is
1.to simulate rebber bearing cyclic loading test with three different axial force,
2.to get the horizontal stiffness at 100% deformation.

the model following:
there is a axial force about 1884 kN at the top node.

question is : when i modify the axial force from 1884 kN to 2261 kN or 2827 kN , and run the code,
there is none variable in horizontal stiffness.

i really need your help, and wait for your reply.



# P
# |
# |
# \|/
# 2 ---
# | |
# | |
# | |
# (1) hb=0.164 m
# | |
# | |
# | |
# =1= ---- -------->X

[linzhidan]

Dear vesna, would you please consider my question?
Thank you very much.

[vesna]

It's because this element does not account for axial force shear interaction.

[linzhidan]

thanks vesna!