Bolt Connection dialog box

Type
Type	Controls the type of bolted connection the software creates.Bolt with Nut creates a bolted connection for a bolt that is held in place with a nut.Bolt in Tapped Hole creates a bolted connection in a tapped (threaded) hole.Spider at Junction creates spider-type connection elements (such as RBE3s) at the junction plane between the mating bodies.
Head/Nut
Define Head By/Define Nut By/Define Junction1 By/Define Junction2 By	Lets you specify the type of geometry to use to define the bolt's head, nut, or junction planes. For a Bolt in Tapped Hole, you only need to define the bolt's head.Select Hole Edge to select the connected edges that define the hole. Holes can either be circular or non-circular.Select Center Point to select the center point of a hole.
Select Edge /Select Object	Lets you select either the edge of the hole or a center point to define the head, nut, or junction plane for the bolt.
Stacked Smart Selector Methods	Opens the Smart Selector Methods dialog box where you can specify a progression of smart selection filters.For more information, see Smart Selector Methods dialog box.
Select Face	If you select Center Point, lets you select the face to which the hole belongs.
Spider Diameter	Controls how you define the diameter of the spider elements at the bolt's head, nut, or junction planes.Select Percent of Hole to define the diameter of the spider elements as a percentage of the size of the bolt hole.Select Diameter to specify the diameter of the spider elements.
Percent of Hole	Lets you define the spider element's diameter as a percentage of the size of the bolt hole at the head or nut. For example if you specify 100, the spider elements' diameter is equal to the diameter of the hole.
Diameter	Lets you specify the diameter of the spider elements at the bolt's head or nut. For more information, see Controlling the size of the spider-type connection.
Tap
Select Tapped Surface	Lets you select the surface that contains the tapped hole.
Bolt Length	Lets you specify the overall length of the bolt.
Effective Thread Length	Lets you specify the length of the threaded portion of the bolt.
Use Spring element
Use Spring element to connect Head to Nut/Use Spring element to connect Head to Tap	Lets you model the bolt's shank as a zero-length spring element instead of a beam element. See Modeling the bolt's shank with a spring element for more information.Note: You cannot select this option if you select the Create Spider at Junction Plane check box.
Junction Plane
Create Spider at Junction Plane	Controls whether the software creates an additional spider-type connection at a junction plane between the head and nut or between the head and tap.For more information see Defining spider-type connections at an intermediate junction plane.
Shank Element/Spider Connection
Type	Lets you specify the type of 1D element to define the bolt's shank and the type of connection element to connect the 1D elements into the surrounding mesh. Available element types depend on the selected solver and solution type. Click Edit Mesh Associated Data to define attributes for the elements. See Mesh Associated Data dialog box for more information.
Destination Collector	Select Automatic Creation to create a new destination collector for the current mesh.Clear the Automatic Creation check box to choose an existing mesh collector from the Mesh Collector list. Click New Collector to open the Mesh Collector dialog box, where you can create additional mesh collectors.
Connect Spider to Midnodes	Controls how the software connects the spider elements into the surrounding mesh.Select Connect Spider to Midnodes to connect the spider elements to the midnodes and the corner nodes in the surrounding mesh.Clear the Connect Spider to Midnodes check box to connect the spider elements to the corner nodes in the surrounding mesh.
Advanced Options
Alignment Tolerance	Determines whether the head of the bolt and the nut or tapped hole are aligned. Specify the angle in degrees within which the software should consider the ends to be aligned.The software finds the vector that is directed from the center of the bolt’s head and the center of the bolt’s nut or tapped hole. The software then finds a second vector at the center of the bolt’s head that is normal to the surface on which the bolt’s head is located. The dot product of the two vectors must be within the specified Alignment Tolerance for the software to create the bolt.
Junction Merge Tolerance	If your model contains multiple junction planes, this tolerance value determines whether the software merges the junction planes. If the distance between the junction planes is less than this value, the software merges the junction planes.
Leg Node Tolerance	Adds an additional radial distance to the specified Spider Diameter value, which the software uses to search for candidate leg nodes in spider-type connections.

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Bolt Connection dialog box, Simcenter 3D 2021.1 Series

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