Welcome
What's New
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Overview
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.
Tutorials
Discover OptiStruct functionality with interactive tutorials.
User Guide
This manual provides detailed information regarding the features, functionality, and simulation methods available in OptiStruct.
Reference Guide
This manual provides a detailed list and usage information regarding input entries, output entries, and parameters available in OptiStruct.
Example Guide
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.
Verification Problems
This manual presents solved verification models including NAFEMS problems.
- NAFEMS Linear Elastic
- NAFEMS Thermo-elastic
- NAFEMS Heat Transfer
- NAFEMS Nonlinear Static Analysis
- NAFEMS Dynamic Response Analysis
- NAFEMS Random Response Analysis
- NAFEMS Normal Modes Analysis
- NAFEMS Composites
- Response Spectrum Analysis
- Elements
- Materials
  - OS-V: 0800 Hyperelastic Material Verification
    Examines the hyperelastic behavior of a hexahedral element under enforced displacement using different material models such as Arruda Boyce, reduced polynomial, Yeoh and Ogden model.
  - OS-V: 0810 Hyperelastic Large Displacement Nonlinear Analysis with a Pressurized Rubber Disk
    In this problem, a rubber disk pinned at its circumferential edge is subjected to pressure load. This causes the disk to bulge into a spherical shape, like a balloon.
  - OS-V: 0820 Marlow Hyperelastic with Viscoelasticity Material Model
    The combination of hyperelastic material models with viscoelasticity allows you to model the strain rate dependent large strain response.
  - OS-V: 0830 Nonlinear Static Analysis with Chaboche Combined Hardening Material
    Chaboche model, which is the extension of Frederick–Armstrong model, is commonly used in modeling uniaxial and multiaxial ratcheting.
  - OS-V: 0840 Viscoplastic Anand Material Model
    Knowledge of the material model and its parameters is essential to predict the behavior of the printed components for FEM Analysis. Anand is one of the material models used to study viscoplastic materials.
- Fatigue Analysis
- Rotor Dynamics
- Frequency Response Analysis
- Explicit Dynamic Analysis
- Aeroelastic Analysis
Frequently Asked Questions
This section provides quick responses to typical and frequently asked questions regarding OptiStruct.

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Materials