Object Properties

Tree Dependencies

Insertion Methods

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API Reference

Additional Related Information

Scope

Source: Read-only and always set to Analytical Crack for Semi-Elliptical Cracks.

Scoping Method: Read-only and always set to Geometry Selection when defining cracks.

Geometry: Use the Body selection filter to pick a solid body, click in the Geometry field, then click Apply.

Definition

Crack ID: A read-only property that displays a unique system generated identification number ID for the crack object. The application uses this identifier when creating solution identifiers for fracture parameters.

Coordinate System: Specifies the user-defined coordinate system that defines the position and orientation of the crack.

Align with Face Normal: Defines the Crack Coordinate System orientation. Options include Yes (default) and No.

Project to Nearest Surface: Defines the Crack Coordinate System origin. Options include Yes (default) and No.

Crack Shape: Read-only and always set to Semi-Elliptical.

Major Radius: Specifies the major radius, which defines the size of the crack shape along the Z axis (that is, the width of the crack). The specified value must be greater than 0.

Minor Radius: Specifies the minor radius, which defines the size of the crack shape along the X axis (that is, the depth of the crack). The specified value must be greater than 0.

Mesh Method: Selects the mesh method to be used to mesh the semi-elliptical crack. Options include Hex Dominant (default) and Tetrahedrons.

Largest Contour Radius: Specifies the largest contour radius for the crack shape. Enter a value greater than 0.

Growth Rate (Mesh Method set to Tetrahedrons only): Specifies the factor with which the mesh layers will grow along the radius of the crack. Specify a value greater than 1. The default value is 1.2. The recommended value is equal to or greater than 1.1.

Crack Front Divisions (Mesh Method set to Hex Dominant only): Specifies the number of divisions for the crack front. The value must be equal to or greater than 3. The default is 15. The Geometry window can display only a maximum of 999 crack front divisions, but you can specify a higher value and fracture meshing will respect it.

Front Element Size (Mesh Method set to Tetrahedrons only): Specifies the element size for the crack front. Default value is computed from crack's ellipse perimeter, which is crack ellipse perimeter/100. Specify a value greater than 0.

Fracture Affected Zone(Mesh Method set to Hex Dominant only): The fracture affected zone is the region that contains a crack. The Fracture Affected Zone control determines how the fracture affected zone height is defined. When set to Program Controlled, the software calculates the height, and Fracture Affected Zone Height is read-only. This is the default. When set to Manual, you enter the height in the Fracture Affected Zone Height field.

Fracture Affected Zone Height(Mesh Method set to Hex Dominant only): This value specifies two things: 1) the height of the Fracture Affected Zone, which is in the Y direction of the crack coordinate system, and 2) the distance in totality by which the Fracture Affected Zone is extended in the positive and negative Z direction of the crack coordinate system from the crack front extremities.

Circumferential Divisions (Mesh Method set to Hex Dominant only): Specifies the number of circumferential divisions for the crack shape. Your entry must be a multiple of 8 and it must be equal to or greater than 8 (default). The Geometry window can display only a maximum of 360 circumferential divisions, but you can specify a higher value and fracture meshing will respect it.

Mesh Contours: Specifies the number of mesh contours for the crack shape. Your entry must be equal to or greater than 1. The default is 6. The Geometry window can display only a maximum of 100 mesh contours, but you can specify a higher value and fracture meshing will respect it.

Solution Contours: Specifies the number of mesh contours for which you want to compute the fracture result parameters. The value must be less than or equal to the value of Mesh Contours, and cannot be greater than 99. By default, the value is Match Mesh Contours, indicating the number of Solution Contours is equal to the number of Mesh Contours. Entering 0 resets the value to Match Mesh Contours.

Suppressed: Toggles suppression of the Crack object. The default is No. The Crack object is suppressed automatically if the scoped body is suppressed.

Buffer Zone Scale Factors

Buffer Zone Scale Factors

It controls the size of the buffer zone in the X, Y, and Z directions, relative to the dimensions of the crack. For each scaling parameter, use the slider to set a value from 2 to 50. The default is 2. The maximum dimension among the three directions of the crack is multiplied by the corresponding scale factors to create a buffer zone. When the mesh method is Hex-Dominant, the crack dimensions also includes fracture affected zone.

Named Selections Creation

Named Selections are created automatically when the fracture mesh is generated. These Named Selections are a special type of Named Selection. For details, refer to the Performing a Fracture Analysis and the Special Handling of Named Selections for Crack Objects sections for more information.