Solid

Realization Details

Solid Type
Figure 1. Pattern 1: Tapered Bolt


Figure 2. Pattern 2: Tapered Bolt with Washer


Figure 3. Pattern 3: Straight Bolt


Figure 4. Pattern 4: Straight Bolt with Washer


Figure 5. Pattern 5: Double Sided Bolt


Figure 6. Pattern 6: Double Sided Bolt with Washers


D1
Diameter of the bolt head.
D2
Input
A manually defined diameter of the bolt shaft.
Auto
The connector will automatically take the diameter of the smallest hole and set it as the diameter of the bolt shaft.
D3 (Patterns 1, 2, 5, and 6 only)
The diameter of the tapered section of the bolt (pattern 1 and 2), or the diameter of the double-sided bolt (patterns 5 and 6).
D4 (Patterns 2 and 4 only)
Diameter of the washer.
D5 (Pattern 6 only)
Diameter of the double-sided washer.
L1
Length of the bolt head, excludes the thickness of the washer.
L2
Length of the main section of the shaft of the bolt.
L3
Transition zone between the tapered section of the shaft of the bolt and the main shaft of the bolt, or the length of the double-sided bolt head excluding the thickness of the washer (pattern 6).
L4 (Patterns 1 and 2 Only)
The length of the tapered section of the bolt (patterns 1 and 2), or the length of the double-sided bolt (pattern 5).
L5
The position of the pretension section.
T (Patterns 2 and 4 only)
The thickness of the washer.
T1 (Pattern 6 only)
The thickness of the washer.
T2 (Pattern 6 only)
The thickness of the double-sided washer.
Mesh Type
Use this option to change between a Hex or a Tet Mesh for the bolt.
Mesh Size
Use this option to define the mesh size down the length of the bolt.
Mesh Density
Use this option to define the mesh density around the circumference of the bolt.
Evaluation Surfaces
Use this option to create finer mesh areas and element sets near the bolt head.
Number of Layers
Specify the number of element layers to be divided down the shaft length.
Divisions per Layer
Specify the number of divisions per element layer.
Figure 7. Definitions for Number of Layers and Divisions per Layer options. In this example, Number of Layers=1 and Divisions per Layer=3.


Pretension
An optional parameter that will create a pretension section.
The position of the pretension section can be controlled by the parameter L5.
Note: If Pretension is OFF, L5 is disabled.
Initial Stress
The initial pretension stress value. For the Radioss solver interface, pretension can be defined in terms of force or pressure.
Shell Offset
Use this option to consider the thickness of shell elements when calculating the bolt’s body length (L2). For patterns with a double-sided head, the shell offset option applies to both sides.
Figure 8. Shell Offset option


Cross Section
Use this option to define the number of cross sections to be created down the bolt length.
Cross Section Option
Define the pitch or density of the cross sections that will be created.
Cross Section Pitch/Density
Define the value that will be used for the pitch or density.
Failure (LS-DYNA Only)
This will create a layer of elements under the head of the bolt with hour glassing and a rupture material so the failure of the bolt can be modeled.
Figure 9.


Rupture Material
An optional selector that can be used to define an existing material for the failure elements. If left empty, a new material will be created for the realization.

Contact

Contact is created for all solver profiles automatically.
Explicit Solver Interfaces
For explicit solver interfaces (LS-DYNA and Radioss), there are no contact options. The entire bolt and links are placed into a contact set. The shaft of the bolt is tied into the last link.
Figure 10.


Figure 11.


Implicit Solver Interfaces
For the Implicit solver interfaces (OptiStruct, Abaqus, and Nastran), under the head of the bolt is modeled separately as a contact. For patterns with a double-sided head, contact is created for both sides.
Figure 12.


The following options are available to control how the shaft of the bolt is contacted.
Shaft Contact Type: (OptiStruct/Abaqus/Nastran only)
Tied
A tied contact is created for the shaft of the bolt and the last link of the connector.
Figure 13.


Threaded (Solid Links Only)
Last Part
A contact patch will be created between the inner face of the solid hole and the face of the bolt shaft.
Figure 14.


Contact Length
Measured from the bottom of the bolt, the contact thread on the bolt will be the specified thread length.
Figure 15.