Command manual - IMPETUS Afea

SMOOTH_MESH

Mesh commands

*SMOOTH_MESH "Optional title" entype, enid, $\alpha_{\mathrm{max}}$, internal, gid csysid

Parameter definition

Variable	Description
entype	Entity type
	options: N, NS, P, PS, G, ALL
enid	Entity identification number
$\alpha_{\mathrm{max}}$	External element face smoothing angle
internal	Flag to activate smoothing of internal material interfaces and to propagate smoothing to internal nodes
	options: 0 $\rightarrow$ only smoothing of external material surface 1 $\rightarrow$ internal smoothing activated
gid	ID of a GEOMETRY that defines a sub-space for smoothing
	default: All elements in the selected part/part set will be smoothed

csysid	Optional coordinate system ID. Smoothing is deactivated in local $x$-direction (axial direction for a cylindrical coordinate system).
	default: not used

Description

This command is used to smooth the surface of quadratic and cubic element surfaces. The surface is smoothed if the angle between two adjacent element faces is smaller than or equal to $\alpha_{\mathrm{max}}$. By default, only external element faces are smoothed. The internal flag turns on smoothing of internal material interfaces and also propagates the surface smoothing to the interior of the mesh.

Example

Smooth mesh

Example showing the effect of mesh smoothing and of having the internal flag set to 0 or 1.

*PARAMETER R0 = 0.8 R1 = 0.9 R2 = 1.0 h = 0.1 tol = 1.0e-4 ang = 45.0 internal = 1 *COMPONENT_PIPE "Inner ring" 1, 1, 1, 16, 1 0, 0, 0, 0, 0, [%h], [%R0], [%R1] *COMPONENT_PIPE "Outer ring" 2, 2, 1, 16, 1 0, 0, 0, 0, 0, [%h], [%R1], [%R2] *MERGE_DUPLICATED_NODES ALL, 0, ALL, 0, [%tol] *CHANGE_P-ORDER ALL, 0, 2 *SMOOTH_MESH ALL, 0, [%ang], [%internal] *MAT_ELASTIC 1, 7800.0, 210.0e9, 0.3 *PART "Inner ring" 1, 1 "Outer ring" 2, 1 *END

Mesh smoothing deactivated in specific direction (coordinate system based)

Example showing the effect of mesh smoothing with optional coordinate system to deactivate smoothing in axial direction.

*UNIT_SYSTEM SI *TIME 1.0, 0, 0, 0.5 *COMPONENT_CYLINDER 1, 1, 10, 6 0, 0, 0, 0, 0, 1, 0.5, 0.1 *COMPONENT_CYLINDER 2, 2, 10, 6 1.25, 0, 0, 1.25, 0, 1, 0.5, 0.1 *COMPONENT_CYLINDER 3, 3, 10, 6 2.5, 0, 0, 2.5, 0, 1, 0.5, 0.1 *CHANGE_P-ORDER ALL, 0, 3 *SMOOTH_MESH P, 2, 45.0, 1 *SMOOTH_MESH P, 3, 45.0, 1 101 *COORDINATE_SYSTEM_CYLINDRICAL 101, 2.5, 0, 0 0, 0, 1, 1, 0, 0 *MAT_RIGID 1, 1 *PART "No mesh smoothing" 1, 1 "Mesh smoothing" 2, 1 "Mesh smoothing with csysid" 3, 1 *END

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