ANSYS Mechanical Tutorials

174 Pages·2015·9.73 MB·English

ANSYS Mechanical Tutorials
ANSYS, Inc. Release 16.0
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Table of Contents
Tutorials ....................................................................................................................................................... v
Actuator Mechanism using Rigid Body Dynamics..................................................................................... 1
Nonlinear Static Structural Analysis of a Rubber Boot Seal..................................................................... 11
Cyclic Symmetry Analysis of a Rotor - Brake Assembly............................................................................ 35
Steady-State and Transient Thermal Analysis of a Circuit Board............................................................. 51
Delamination Analysis using Contact Based Debonding Capability....................................................... 61
Interface Delamination Analysis of Double Cantilever Beam.................................................................. 77
Fracture Analysis of a 2D Cracked Specimen using Pre-Meshed Crack.................................................... 97
Fracture Analysis of a Double Cantilever Beam (DCB) using Pre-Meshed Crack.................................... 107
Fracture Analysis of an X-Joint Problem with Surface Flaw using Internally Generated Crack Mesh.... 113
Using Finite Element Access to Resolve Overconstraint......................................................................... 121
Simple Pendulum using Rigid Dynamics and Nonlinear Bushing.......................................................... 153
Track Roller Mechanism using Point on Curve Joints and Rigid Body Dynamics .................................. 159
Index........................................................................................................................................................ 167
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Tutorials
This section includes step-by-step tutorials that represent some of the basic analyses you can perform
in the Mechanical Application.The tutorials are designed to be self-paced and each have associated
geometry input files.You will need to download all of these input files before starting any of the tutorials.
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of ANSYS, Inc. and its subsidiaries and affiliates. v
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Actuator Mechanism using Rigid Body Dynamics
This example problem demonstrates the use of a Rigid Dynamic analysis to examine the kinematic
behavior of an actuator after moment force is applied to the flywheel.
Features Demonstrated
• Joints
• Joint loads
• Springs
• Coordinate system definition
• Body view
• Joint probes
Setting Up the Analysis System
1. Create the analysis system.
Start by creating a Rigid Dynamics analysis system and importing geometry.
a. Start ANSYS Workbench.
b. In the Workbench Project page, drag a Rigid Dynamics system from the Toolbox into the Project
Schematic.
c. Right-click the Geometry cell of the Rigid Dynamics system, and select Import Geometry>Browse.
d. Browse to open the Actuator.agdb file. A check mark appears next to the Geometry cell in the
Project Schematic when the geometry is loaded.This file is available on the ANSYS Customer Portal;
go to http://support.ansys.com/training.
2. Continue preparing the analysis in the Mechanical Application.
a. In the Rigid Dynamics system schematic, right-click the Model cell, and select Edit.The Mechanical
Application opens and displays the model.
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Actuator Mechanism using Rigid Body Dynamics
The actuator mechanism model consists of four parts: (from left to right) the drive, link, actuator,
and guide.
b. From the Menu bar , select Units>Metric (mm, kg, N, s, mV, mA).
Note
Stiffness behavior for all geometries are rigid by default.
3. Remove surface-to-surface contact.
Rigid dynamic models use joints to describe the relationships between parts in an assembly. As
such, the surface-to-surface contacts that were transferred from the geometry model are not needed
in this case.To remove surface-to-surface contact:
a. Expand the Connections branch in the Outline, then expand the Contacts branch. Highlight all of the
contact regions in the Contacts branch.
b. Right-click the highlighted contact regions, then select Delete.
Note that this step is not needed if your Mechanical options are configured so that automatic
contact detection is not performed upon attachment.
4. Define joints.
Joints will be defined in the model from left to right as shown below, using Body-Ground and
Body-Body joints as needed to solve the model.
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Prior to defining joints, it is useful to select the Body Views button in the Connections toolbar.The
Body Views button splits the graphics window into three sections: the main window, the reference
body window, and the mobile body window. Each window can be manipulated independently.This
makes it easier to select desired regions on the model when scoping joints.
To define joints:
a. Select the drive pin face and link center hole face as shown below, then select Body-Body>Revolute
in the Connections toolbar.
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Actuator Mechanism using Rigid Body Dynamics
b. Select the drive center hole face as shown below, then select Body-Ground>Revolute in the Connec-
tions toolbar.
c. Select the link face and actuator center hole face as shown below, then select Body-Body>Revolute
in the Connections toolbar.
d. Select the actuator face and the guide face as shown below, then select Body-Body>Translational in
the Connections toolbar.
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