Interaction in Abaqus/Explicit

[anthaivn2019]

Dear all,

There are 2 blocks of A and B.
Block A is subject to dynamic loads according to the history of time. Block B stands still.
I want to declare the contact surface of blocks A and B with great friction to show its dependence on this coefficient.
So what function do I need to use because when I use "static-knitic exponential decay", the result of z-direction (V3) does not change.
Or another way to reduce the speed in this z direction.
Many thanks.

Hoang An

 

[FEA way]

Static-Kinetic Exponential Decay model works in such way that friction coefficient is highest at the beginning (static friction) and then falls down during motion to the lower value (kinetic friction). This model is used since in real life static friction is higher than kinetic one (it’s harder to initiate relative motion between surfaces than keep this motion when it’s already in progress). Exponential decay describes smooth transition between static and kinetic friction as exponential curve. You can try with different models but I think that if you adjust the data specified for this model you will reach desired result.

Remember that the formula used in this model is:

μ=μ_k+(μ_s-μ_k)e^(-d_c*γ_eq)

where: μ_s - static friction coefficient, μ_k - kinetic friction coefficient, d_c - decay coefficient, γ_eq - slip rate.

Other available models include rough contact (zero slip) and anisotropic friction coefficient.