Flat-Joint Model Properties
The properties of the Flat-Joint Model model are shown below for reference. More detailed information regarding these properties is presented here.
Note
Read-only properties are indicated by (r) at right in this listing.
- fj_area f (r)
\(A^{(e)}\) - area of element \((e)\).
- fj_cen v (r)
\(x^{(e)}\) - centroid location of element \((e)\).
- fj_coh f
\(c\) - cohesion in units stress with default value 0.0.
- fj_cohres f
\(c_r\) - residual cohesion in units stress with default value 0.0.
- fj_egap f (r)
\(g^{(e)}\) - gap at centroid of element \((e)\).
- fj_emod f (r)
\(E^*\) - effective modulus.
- fj_fa f
\(\phi\) - friction angle in units degrees with default value 0.0.
- fj_force v (r)
\(\tilde{{\mathbf F}}\) - interface force.
- fj_fric f
\(\mu\) - friction coefficient with default value 0.0.
- fj_gap f (r)
\(g_s\) - surface gap.
- fj_gap0 f (r)
\(g_0\) - initial surface gap.
- fj_kn f
\(k_n\) - normal stiffness in units stress/disp. with default value 0.0.
- fj_kratio f (r)
\(\kappa^*\) - normal-to-shear stiffness ratio.
- fj_ks f
\(k_s\) - shear stiffness in units stress/disp. with default value 0.0.
- fj_moment v (r)
\(\tilde{{\mathbf M}}\) - interface moment.
- fj_mtype i (r)
initial microstructural type.
- fj_nal i (r; 3D ONLY)
\(N_\alpha\) - number of elements in circumferential direction.
- fj_nr i (r)
\(N_r\) - number of elements in radial direction (total number of elements in 2D).
- fj_radius f (r)
\(R\) - flat-joint radius.
- fj_relbr v2 (r)
\({\pmb \theta}_{\mathbf b}\) - relative bend-rotation as a 2D vector.
- fj_resmode i
\(M_r\) - residual cohesion mode. If \(M_r = 0\), the shear stress drops to zero. If \(M_r = 1\), the shear stress drops to the residual value.
- fj_rmul f (r)
\(\lambda\) - radius multiplier.
- fj_shear f (r)
\(\tau_c^{(e)}\) - shear strength in units stress at centroid of element \((e)\).
- fj_sigma f (r)
\(\sigma^{(e)}\) - normal stress at centroid of element \((e)\).
- fj_slip b (r)
\(s^{(e)}\) - slip state of element \((e)\).
- fj_state i (r)
\(B^{(e)}\) - bond state of element \((e)\).
- fj_tau f (r)
\(\tau^{(e)}\) - shear stress at centroid of element \((e)\).
- fj_ten f
\(\sigma_c\) - tensile strength in units stress with default value 0.0.
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