Model bolt threads (SOL 402)

This procedure uses the Virtual Thread Contact simulation object to model bolt threads for a SOL 402 Multi-Step Nonlinear Kinematics analysis. The bolt must consist of a bolt cylinder and a bolt casing. Both must use a cylindrical shape. You define contact between the surface of the bolt cylinder and the bolt hole.

1. Make the Simulation file the work part and the displayed part.

2. Choose Home tab→Loads and Conditions group→Simulation Object Type list→Virtual Thread Contact .

3. In the Virtual Thread Contact dialog box, select a method for creating the pair of inner (bolt cylinder) and outer (bolt hole) contact face pairs. For information, see Automatic face pairing.

4. In the Thread Definition group, define the bolt thread.To model all threads in the same direction, select Single-Sided Contact and set an angle value.You can model the bolt thread in compression or tension depending on the order in which you select the bottom and top nodes when you set the bolt axis. For more information, see Thread Shape in Virtual Thread Contact dialog box.To model threads in alternating directions, select Double-Sided Contact and set an angle value and a pitch value.

5. In the Bolt Axis group, define the bolt orientation by first selecting the center node or point on the bottom of the bolt, and then selecting the center node or point on the top of the bolt.If you created an RBE2 or RBE3 element for modeling large displacements or rotations, select the center node of that element.Note: If you set Thread Shape to Single-Sided Contact, the order in which you select the bottom and top nodes determines if the bolt is in tension or compression. For more information, see Thread Shape in Virtual Thread Contact dialog box.The bolt center and bolt orientation must be accurate because the software uses them to position the virtual thread in relation to the inner and outer faces (contact regions). For more information, see Bolt kinematics and Bolt orientation in Modeling bolt threads (SOL 402).

6. (Optional) In the Contact Parameters group, specify options to define the behavior of the contact.In the Coefficient of Static Friction box, type the value you want the software to use when it detects contact and calculates tangential contact forces.From the Contact Parameters list, select an existing Virtual Contact Parameters modeling object, or click Create Modeling Object to create a new one.

7. Click OK.The Bolt Contact simulation object appears in the Simulation Navigator in the Simulation Object Container. To model additional bolts, you can copy the Virtual Thread Contact simulation object, and you can reuse the Virtual Contact Parameters modeling object. However, when you copy the Virtual Thread Contact simulation object, you must change the selected surfaces (face pairs) and orientation (Bolt Axis). The orientation is unique for each Virtual Thread Contact simulation object.

Model bolt threads (SOL 402), Simcenter 3D 2021.1 Series

© 2020 Siemens

window.mainLanguage="en_US"

window.delivId=""

window.projectId=""

MathJax.Hub.Config({ TeX: { extensions: ["autoload-all.js"] }, tex2jax: { displayMath: [ ] }, "SVG": { scale: 125 } });