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

Some properties are read only as stated below.

flatjoint

fj_area f

$A^{(e)}$ - area of element $(e)$. This is a read-only property.

fj_cen v

$x^{(e)}$ - centroid location of element $(e)$. This is a read-only property.

fj_coh f

$c$ - cohesion in units stress with default value 0.0.

fj_egap f

$g^{(e)}$ - gap at centroid of element $(e)$. This is a read-only property.

fj_elem i

$e$ - set element ( $e$ ) to i with default value 1.

fj_emod f

$E^*$ - effective modulus. This is a read-only property.

fj_fa f

$\phi$ - friction angle in units degrees with default value 0.0.

fj_force v

$\tilde{{\mathbf F}}$ - interface force. This is a read-only property.

fj_fric f

$\mu$ - friction coefficient with default value 0.0.

fj_gap f

$g_s$ - surface gap. This is a read-only property.

fj_gap0 f

$g_0$ - initial surface gap. This is a read-only property.

fj_kn f

$k_n$ - normal stiffness in units stress/disp. with default value 0.0.

fj_kratio f

$\kappa^*$ - normal-to-shear stiffness ratio. This is a read-only property.

fj_ks f

$k_s$ - shear stiffness in units stress/disp. with default value 0.0.

fj_moment v

$\tilde{{\mathbf M}}$ - interface moment. This is a read-only property.

fj_mtype i

initial microstructural type. This is a read-only property.

fj_nal i (3D ONLY)

$N_\alpha$ - number of elements in circumferential direction. This is a read-only property.

fj_nr i

$N_r$ - number of elements in radial direction (total number of elements in 2D). This is a read-only property.

fj_radius f

$R$ - flat-joint radius. This is a read-only property.

fj_relbr v2

${\pmb \theta}_{\mathbf b}$ - relative bend-rotation as a 2D vector. This is a read-only property.

fj_rmul f

$\lambda$ - radius multiplier. This is a read-only property.

fj_shear f

$\tau_c^{(e)}$ - shear strength in units stress at centroid of element $(e)$. This is a read-only property.

fj_sigma f

$\sigma^{(e)}$ - normal stress at centroid of element $(e)$. This is a read-only property.

fj_slip b

$s^{(e)}$ - slip state of element $(e)$. This is a read-only property.

fj_state i

$B^{(e)}$ - bond state of element $(e)$. This is a read-only property.

fj_tau f

$\tau^{(e)}$ - shear stress at centroid of element $(e)$. This is a read-only property.

fj_ten f

$\sigma_c$ - tensile strength in units stress with default value 0.0.

fj_track b

tracking state for use when plotting contacts with the specific numeric value with default value false.

user_area f

$A$ - set contact area to the constant value f.