OptiStruct is a proven, modern structural solver with comprehensive, accurate and scalable solutions for linear and nonlinear
analyses across statics and dynamics, vibrations, acoustics, fatigue, heat transfer, and multiphysics disciplines.
The OptiStruct Example Guide is a collection of solved examples for various solution sequences and optimization types and provides
you with examples of the real-world applications and capabilities of OptiStruct.
This section presents nonlinear small displacement analysis examples generated using OptiStruct. Each example uses a problem description, execution procedures, and results to demonstrate how OptiStruct is used.
This section presents nonlinear large displacement analysis examples generated using OptiStruct. Each example uses a problem description, execution procedures, and results to demonstrate how OptiStruct is used.
A uniform, homogeneous plate which is symmetric about horizontal axes in both geometry and loading, to find the maximum
axial stress in the plate with a hole.
Snap-fit is a combination of two components namely mating and base part which form a mechanical attachment between them
by means of locators, locks and enhancements. Nonlinear Static Analysis with large displacement theory is used to solve
this example.
Contact smoothing is useful to increase accuracy of the contact solution. An enforced displacement to push two concentric
rings toward each other to engage the contact is used. The usage of NLOUT entry allows you to study the progression of SPC force over successive increments.
Demonstrate a revolute joint using JOINTG and MOTNJG. The JOINTG entry can be used for defining a variety of joints, including revolute, ball, universal, cardan, and so on. Motion on
these joints can be applied using the MOTNJG entry.
The PCOMPLS entry can be used to define continuum shell composites using solid elements. Currently first order CHEXA and CPENTA solid elements are supported.
Demonstrates self-contact which is used in this nonlinear large displacement implicit analysis involving hyperelastic
material and contacts using OptiStruct.
This section presents nonlinear transient analysis examples generated using OptiStruct. Each example uses a problem description, execution procedures, and results to demonstrate how OptiStruct is used.
This section presents normal modes analysis examples generated using OptiStruct. Each example uses a problem description, execution procedures, and results to demonstrate how OptiStruct is used.
This section presents complex eigenvalue analysis examples generated using OptiStruct. Each example uses a problem description, execution procedures, and results to demonstrate how OptiStruct is used.
This section presents thermal and heat transfer analysis examples generated using OptiStruct. Each example uses a problem description, execution procedures, and results to demonstrate how OptiStruct is used.
This section presents analysis technique examples generated using OptiStruct. Each example uses a problem description, execution procedures, and results to demonstrate how OptiStruct is used.
This section presents shape optimization example problems, solved using OptiStruct. Each example uses a problem description, execution procedures and results to demonstrate how OptiStruct is used in shape optimization.
The examples in this section demonstrate how topography optimization generates both bead reinforcements in stamped
plate structures and rib reinforcements for solid structures.
The examples in this section demonstrate how the Equivalent Static Load Method (ESLM) can be used for the optimization
of flexible bodies in multibody systems.
This section presents multiphysic examples generated using OptiStruct. Each example uses a problem description, execution procedures, and results to demonstrate how OptiStruct is used.
This section presents response spectrum examples generated using OptiStruct. Each example uses a problem description, execution procedures, and results to demonstrate how OptiStruct is used.
This section presents nonlinear explicit analysis examples generated using OptiStruct. Each example uses a problem description, execution procedures, and results to demonstrate how OptiStruct is used.
This section presents piezoelectric analysis examples generated using OptiStruct. Each example uses a problem description, execution procedures, and results to demonstrate how OptiStruct is used.
The OptiStruct Example Guide is a collection of solved examples for various solution sequences and optimization types and provides
you with examples of the real-world applications and capabilities of OptiStruct.
This section presents nonlinear large displacement analysis examples generated using OptiStruct. Each example uses a problem description, execution procedures, and results to demonstrate how OptiStruct is used.
The model in Figure 1 is an example for elastomer domes underneath keyboard
buttons and boot seals. Loading is applied on the green part which is constructed with steel
material, while the elastomer dome is of a hyperelastic material. Elastomers are typically
modeled as hyperelastic material with their incompressibility and instantaneous elastic
response for large strains. Hyperelastic material behavior are well described as strain
energy functions.
FE Model
Element Types
CHEXA
CPENTA
CQUAD
The material properties are:
Steel Material
Young’s Modulus
2.1E5 MPa
Poisson's Ratio
0.3
Density
7.8E-9 Tonne/mm3
Elastomer Dome Material MATHE
Model
MOONEY
NU
0.495
C10
0.482
C01
0.12
D1
0.0166
Results
Review the element stress and displacement magnitude for loading and unloading conditions,
as shown in Figure 2.