# Smoothjoint Model Properties

The properties of the Smooth-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.

smoothjoint
ddir (3D) f

$$\theta_d$$ - joint dip direction in units degrees with default value 0.0.

dip f

$$\theta_p$$ - joint dip in units degrees with default value 0.0.

sj_area f

$$A$$ - joint area. This is a read-only property.

sj_coh f

$$c$$ - cohesion with default value 0.0.

sj_da f

$$\psi$$ - dilation angle in units degrees with default value 0.0.

sj_fa f

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

sj_fn f

$$F_n$$ - normal force magnitude with default value $$\mathbf 0$$.

sj_fric f

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

sj_fs v

$$\mathbf{F_s}$$ - shear force vector with default value $$\mathbf{0}$$.

sj_gap f

$$g_j$$ - joint gap with default value 0.0.

sj_kn f

$$k_n$$ - normal stiffness per unit area in units force/volume with default value 0.0.

sj_ks f

$$k_s$$ - shear stiffness per unit area in units force/volume with default value 0.0.

sj_large b

$$S_l$$ - large strain flag with default value false.

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

sj_rmul f

$$\lambda$$ - joint radius multiplier with default value 1.0.

sj_shear f

$${\tau}_c$$ - shear strength in units stress with default value 0.0.

sj_slip b

$$s$$ - slip state. This is a read-only property.

sj_state i

$$S_j$$ - joint bond state with default value 0.

sj_ten f

$${\sigma}_c$$ - tensile strength in units stress with default value 0.0.

sj_un f

$$\stackrel{\frown}{{\delta_n}}$$ - normal displacement. This is a read-only property.

sj_unorm v

$$\mathbf{\hat{n}_j}$$ - joint unit normal. This is a read-only property.

sj_us v

$$\stackrel{\frown}{{\pmb{\delta}_\mathbf{s}}}$$ - shear displacement. This is a reead-only property.