I always wander what stretched force would be in a thread if it is tightened between two impossible to move briks and the thread, by any means becomes shorter just in one mm? Is there any solution?
Pre-tension section might be what you are looking for. You can apply displacement boundary condition to the reference node and obtain force as a result.
Happy 2023!
Thank you, do you know a formula that pre-tension section was based on?
k_rod = section_area * elastic_modulus / length
F = k_rod * x
k_rod is stiffness
x is stretch or compression
Happy New Year (it just began in my country)!
Internally, pre-tension section is realized by multiple point constraint (MPC). The rest belongs to FEM.
Well, well then,
Absolute longitudinal deformation
∆l = l1 - l
where:
l1 - length of the thread after deformation
l - length before deformations
Relative longitudinal deformation
epsilon = ∆l / l
Tensile stress
sigma = E * epsilon
where:
E - modulus of elasticity
And that is all.
What political position do you occupy?
I live in Poland.
There’s also a formula that can be used to calculate pre-tension force based on applied torque.
I would do a simple test in your FEA software to check if that’s all.
I will some day., I will.