How to define Joint in Ansys Static Structural and examples to use

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  Joint boundary condition is a type of connection element that allows you to model the relative motion and interaction between two or more bodies in a structural analysis. Joint boundary condition can be used to simulate various types of joints, such as revolute, cylindrical, spherical, planar, slot, universal, and fixed joints. Joint boundary condition can also be used to apply loads and moments to the connected bodies.

To use joint boundary condition in Ansys Static Structural, you need to follow these steps:

  • In the Model tree, right-click Connections and select Insert > Joint.
  • In the Details view, select the type of joint you want to create from the drop-down list.
  • In the Geometry section, select the two or more bodies that you want to connect with the joint. You can also specify the location and orientation of the joint coordinate system (JCS) using the options available.
  • In the Definition section, specify the degrees of freedom (DOF) that you want to allow or restrict for the joint. You can also define stiffness, damping, and friction properties for the joint if needed.
  • In the Loads section, you can apply forces and moments to the joint in any direction. You can also define time-dependent or frequency-dependent loads using tables or functions.
  • Click Generate to create the joint boundary condition.

You can also modify or delete the joint boundary condition by right-clicking it in the Model tree and selecting Edit or Delete.

Here are some examples of how to use joint boundary condition in Ansys Static Structural for different types of joints:

  • Revolute Joint: This example shows how to model a revolute joint between a crank and a connecting rod of an engine. The revolute joint allows rotation about one axis and restricts all other DOF. A torque is applied to the crank and a force is applied to the connecting rod. The results show the stress distribution and displacement of the parts due to the joint motion.
  • Cylindrical Joint: This example shows how to model a cylindrical joint between a piston and a cylinder of an engine. The cylindrical joint allows translation and rotation along one axis and restricts all other DOF. A pressure load is applied to the piston and a fixed support is applied to the cylinder. The results show the stress distribution and displacement of the parts due to the joint motion.
  • Spherical Joint: This example shows how to model a spherical joint between a ball and a socket of a hip implant. The spherical joint allows rotation about three axes and restricts all other DOF. A force is applied to the ball and a fixed support is applied to the socket. The results show the stress distribution and displacement of the parts due to the joint motion.

I have searched the web for some relevant sources that show how to use joint boundary condition in Ansys Mechanical for different types of joints, such as revolute, cylindrical, spherical, planar, slot, universal, and fixed joints. You can watch some videos or read some articles that explain how to create and edit joints in Ansys Mechanical, how to specify the degrees of freedom, stiffness, damping, and friction properties for the joints, how to apply loads and moments to the joints, and how to post-process the results of the joint analysis. Here are some links that you can check out:

  • Working with Joints in ANSYS Mechanical | CAE Associates | ANSYS e-Learning: This video shows some of the tools and capabilities in Ansys Workbench v14.5 for defining and working with joints. It covers how to create joints using geometry scoping or remote points, how to modify or delete joints, how to use joint probes to plot joint forces and moments, and how to use joint loads to apply prescribed motion or displacement to joints.
  • ANSYS Explicit Dynamics: Using Joints, Joint Loads and Probes: This video shows how you can use joints in an Ansys Explicit Dynamics analysis to simulate the actual failure of an engine piston rod, which would not be possible with rigid bodies. It shows various joint types, joint loads, and joint probes that are available in Ansys Explicit Dynamics.
  • How to Model Joints via Constraints in Ansys Workbench Mechanical: This video shows how you can model joints via constraints in Ansys Workbench Mechanical using the command snippet feature. It explains how to use the MPC184 element type to create different types of joints, such as revolute, cylindrical, spherical, etc., and how to export the joint forces and moments using APDL commands.
  • Ansys Mechanical: All About Joints: This article covers some MAPDL commands to export joint element forces and moments as well as some strategies for working with joints in Ansys Mechanical. It explains why joints are useful for modeling complex mechanisms and interactions between bodies, and how to define and post-process joints using MAPDL.
  • Lecture 5 Modeling Connections: This lecture slides provide an overview of the different types of connections available in Ansys Mechanical, such as contact, bonded contact, bolted connection, spot welds, beam connection, etc. It also introduces the concept of joint boundary condition and shows some examples of using joints in Ansys Mechanical.

I hope these examples help you learn how to use joint boundary condition in Ansys Mechanical. If you have any questions or feedback, please let me know. 😊

If U want learn some other interested topics about Ansys, check links below:

Types of contacts on Ansys Static Structural and examples to use




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