Ball Joints - CAESAR II - Reference Data

CAESAR II Applications Guide

PPMProduct
CAESAR II
PPMCategory_custom
Reference Data
Version_CAESAR
12

Ball joints can be modeled with zero-length expansion joints, or with restraints and connecting nodes. When using expansion joints, each ball and socket is defined with one zero-length expansion joint having rigid axial and transverse stiffnesses and zero bending and torsional stiffnesses.

If torsional stiffness is small, use a value of 1.0.

Results are invalid for large rotatioN.

Method 1

Zero-Length Expansion Joint

Modeling a ball joint between nodes 20 and 21
using a zero-length expansion joint.

Ball Joint Diagram

Node-CNode Model


Input Specifics

Method 2

Axial, Translational Restraints

Modeling a ball joint between nodes 20 and 21
using axial, translational restraints with CNodes.
The next element starts at node 21 (the From node).

Ball Joint Diagram

Node-CNode Model


Input Specifics