Structural engineers today face increasingly complex challenges—extreme loading conditions, nonlinear behavior, progressive failure, and the need for realistic, physics-based modeling. Extreme Loading for Structures (ELS) was created to bridge the gap between simplified nonlinear tools and highly complex, high-fidelity numerical models.
With the release of ELS 11, that mission continues—bringing powerful simulation capabilities together with improved performance, usability, and new modeling enhancements.
What Is ELS?
ELS is an advanced structural analysis software built on the Applied Element Method (AEM), a numerical technique that combines the strengths of discrete and continuum modeling. Unlike traditional FEM tools, ELS models structures using solid elements connected by springs, allowing it to naturally capture cracking, separation, collision, and collapse behavior.
This approach makes ELS particularly well-suited for analyzing structures subjected to extreme and nonlinear loading scenarios, including:
- Blast and impact
- Progressive collapse
- Seismic and wind loading
- Structural failure and post-failure behavior
- Masonry systems (including different bond patterns)
Core Capabilities of ELS
ELS provides a wide range of advanced analysis tools used in both engineering practice and research environments, including:
- Time History Analysis
- Pushover Analysis
- Blast Analysis, with loads generated from UFC 3-340-02, imported blast pressures, or CFD-based pressure profiles
These capabilities make ELS a powerful tool for engineers analyzing real-world structural behavior beyond elastic assumptions.
What’s New in ELS 11
Building on this strong foundation, ELS 11 introduces targeted improvements that enhance both modeling accuracy and user experience.
Expanded Link Member Modeling Tools
ELS 11 includes improvements to link elements, providing greater control when modeling:
- Cables
- Tie rods
- Bracing systems
- Other tension-only components
These enhancements improve the representation of nonlinear force redistribution during staged loading, dynamic events, and large deformations.
Sag Correction for Tension-Only Cables
A major new feature in ELS 11 is sag correction for linear tension-only cable materials.
When enabled:
- Initial stiffness is reduced to reflect real sag behavior
- Stiffness increases as sag diminishes under applied tension
- Deformation behavior becomes more realistic without manual tuning
This is especially valuable for modeling cable-supported and prestressed systems where early-stage behavior matters.
Performance and Stability Enhancements
ELS 11 also includes multiple under-the-hood improvements, resulting in:
- Faster solution times for large or nonlinear models
- Improved stability during highly nonlinear sequences
- Smoother interaction when editing geometry, materials, and loads
Enhanced Visualization and Reporting
Clear communication of results is essential. ELS 11 improves:
- Deformation visualization
- Stress and strain mapping
- Element-level reporting
- Export tools for documentation and presentations
Introducing ELS 11–5k: A More Accessible Entry Point
ELS 11 is already available for both current and new users.
For engineers interested in exploring the software with smaller project sizes, a special ELS 11–5k edition is being introduced. This version supports models of up to 5,000 elements, making it ideal for learning, evaluation, and many practical studies.
- Free until July 15, 2026
- Same core technology as full ELS
- Ideal for new users, researchers, and students
ELS 11–5k will be released in the coming weeks.
To be notified as soon as it’s ready for download, please fill out the form below.
Hear what you can do with ELS 11-5K!
Built for Real-World Engineering
From historic masonry structures to modern reinforced concrete systems, ELS continues to support engineers tackling some of the most demanding structural challenges:
- Progressive collapse and failure modeling
- Blast and impact response
- Seismic performance assessment
- Soil–structure interaction
- Conservation and rehabilitation engineering
- Advanced academic and applied research
With ELS 11, we’ve focused on making advanced structural simulation more powerful, more efficient, and more accessible than ever. We can’t wait to see what you’ll create, test, and discover with ELS 11.