9.10 Level Set Element

The element is used to define the initial position of the zero level set curve. The element current implementation is restricted to 2D problems.

LEVEL_XFEM

Element_name = Level_Xfem, etc. …

< material data >

< connectivity data >.

9.10.1 Element Control Information

Note Variable Name Type Default Description

Element_name list [*] Level_Xfem

Element_type list [interface] Element type

Element_shape list [two_node_line] Element shape

Level_set_type list [*] Level set type

signed_distance signed distance function

(1) Enrichment_type list [none] Enrichment type

signed_distance

Level_set_material list [off] Level set material data

Notes/

(1) Only applicable to Xfem calculations.

9.10.2 Material Properties Data

Note Variable Name Type Default Description

Level_set_material_model list [none] Title

Critical_energy real [0.0] Critical energy release rate, G_c

(1) Growth_formula list [*] Growth formula

none / hyperbolic_sin

(1) Threshold_energy real [0.0] Threshold energy release rate G_th

(1) Growth_V0 real [0.0] Growth velocity, V0

(1) Growth_beta real [0.0] Growth parameter beta, β

Notes/

(1) The velocity is computed as: .

9.10.3 Nodal Connectivity Data

Consult Chapter 11 for details; for this element NEN=2.

Notes . .

Notes . .