Mechanical APDL Structural Analysis Guide

NLGEOM,ON! Nonlinear geometric effects (large deformations) ! NROPT=AUTO by default: Program chooses appropriate Newton-Raphson ...

Multiphysics, ANSYS Mechanical, and ANSYS Structural products only. See the Element Reference for details. 8.10.1. Element Birth ...

The pseudo velocity is calculated as a displacement increment divided by the time increment of the substep. Therefore, any DOF t ...

larger value should be used for shell, beam, and link elements. Use a smaller value if the specified time for a load step is sma ...

8.11.1.1.3. Using the Options for the First Substep When stabilization is active, you can activate artificial dashpot elements ( ...

8.11.1.2. Checking Results Aft er Applying Stabilization Stabilization can help with convergence problems, but it can also affec ...

Be aware that when stabilization is active, the results could vary if the number of substeps changes. The behavior occurs becaus ...

You can freely switch from the Newton-Raphson iteration method to the arc-length method at the start of any load step. However, ...

To help you understand when to use either method, the following table compares both methods and their applications: Nonlinear St ...

8.12.1.1. Understand Your Program and Structure Behavior If you have not used a particular nonlinear feature before, construct a ...

8.12.1.4. Apply Loading Gradually For nonconservative, path-dependent systems, you need to apply the load in small enough increm ...

A convergence failure can also indicat e a physical instability in the structure, or it can merely be the result of some numeric ...

Information stored in this file helps identify when and how contact occurs, determine the regions where contact is unstable, and ...

8.12.2.4. Automatic Time Stepping Place an upper limit on the time step size (DELTIM or NSUBST), especially for complicated mode ...

In some cases, you can use imposed displacements instead of applied forces. This approach can be used to start a static analysi ...

*** NOTE *** CP= 13.891 TIME= 11:09:22 Nonlinear analysis, NROPT set to 1 (full Newton-Raphson solution procedure) for all DOFs. ...

8.12.2.13. Graph the Load and Response History This verification technique may be considered to be a graphical combination of tw ...

EX = 16911.23 Pa PRXY = 0.3 The kinematic hardening plasticity curve for the material is: Log Strain True Stress (Pa) 0.00112351 ...

8.13.3.1. Set the Analysis Title and Jobname Choose menu path Utility Menu> File> Change Title. Type the text "Cyclic loa ...

Repeat the previous step to enter the following Strain/Stress value pairs: 0.002562402, 25.08; 0.004471788, 29.07; 0.006422389, ...