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  • About
    • Who We Are
    • S.A.F.E.R. Simulation
    • Partners & Providers
    • News & Events
    • Careers
    • Contact Us
  • Applications
    • What We Solve
    • Aerospace & Defense
    • Detailed Stress
    • Composites
    • Fracture Mechanics
    • Residual Stress
    • Sim Apps
  • Products
    • What We Develop
    • StressCheck Professional
      • StressCheck Core
      • Solvers
      • Advanced Modules
      • Utilities
    • StressCheck Apps
      • CAE Handbook
      • StressCheck Tool Box
  • Support
    • How We Can Help
    • Getting Started
    • Software FAQ’s
    • Documentation
    • Training
    • Consulting
    • Product Updates
  • Simulation
    • How We Simulate
    • Simulation Governance
    • History of FEA
    • Dictionary & Terms
    • Simulation FAQ
    • Simulation References
  • Resource Library
    • Case Studies
    • Webinars
    • Product Demos
    • Product Downloads
    • StressCheck Tutorials
    • Sim App & API Development

Our Simulation Technology

Home Our Simulation Technology

Our Simulation Technology

ESRD’s flagship software product, StressCheck®, is an advanced FEA tool having numerous unique technical capabilities and inherent structure to support verification and validation (V & V).

It is the first and so far only FEA software product designed to support Simulation Governance and V & V.

FEA + Simulation Governance = Verifiable Solutions

We take V&V and Simulation Governance seriously.

Our verifiable solutions are made possible by implementing the requirements of Simulation Governance.  Simulation Governance controls and standardizes the simulation process much like Corporate Governance controls and standardizes the functioning of a corporation.

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The yardstick that measures successful implementation of Simulation Governance is validation of the model and verification of the solution.  As these terms can be misused in practice, the Dictionary & Terms glossary was developed to help us speak the same technical language.

Our Approach to Numerical Simulation

StressCheck®‘s Simulation Technology, or Sim Tech, is based on higher-order hierarchic finite element technology, the result of decades of R&D on numerical simulation advancements.

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StressCheck®‘s engine has inherent differentiators which support verification and validation of FEA solutions.

We keep our element library simple, our solutions hierarchic and our post-processing unrestricted.

How We Benchmark

How can you tell if your current FEA code can guarantee reliability? If you submit a result to management and you can tell them that the margin of error for your prediction is within, say, 2% and you can back it up, then you are using a code that guarantees reliability.

Without verification, benchmarking is moot. We only benchmark with verified FEA results.

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What Powers Our Simulation Technology

StressCheck® Professional is based on the p-version finite element method. Because the p-version is a more comprehensive implementation of the finite element method than the more traditional h-version, StressCheck® Professional can be operated in both the “h-mode” (least efficient) and “hp-mode” (most efficient).

Additionally, higher-order (p-version) FEA converges at least twice as fast as the lower-order (h-version, what other FEA codes typically have). Use fewer degrees of freedom to get higher solution quality. But it gets even better: with proper meshing the error of approximation decreases exponentially. A problem that takes hours to solve with a traditional h-code will only take minutes with StressCheck®.

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Also, StressCheck® is the only FEA program in existence today which was designed for controlling both the errors of discretization and idealization.

  • The errors of discretization are the errors controllable by the finite element mesh and the polynomial degree (h- or p-extensions).
  • The errors of idealization are the errors associated with the restrictions incorporated in mathematical model.

 

This allows StressCheck® to support numerical simulation like no other FEA product.

Key Benefits of Our Simulation Technology

The following are tenants upon which StressCheck®‘s implementation is built, and the benefits that its implementation unlocks.

ConvergenceCheck Industry-Leading Quality Assurance What supporting evidence does the analyst have that he or she has converged to the exact solution for the problem at hand? Using traditional FEA codes the analyst is forced to refine the mesh in areas of interest, rerun the solution, and compare two or three solutions to check for convergence. This is often a tedious and roundabout process, and can cause many an analyst to "spin the wheels" to find the "best" mesh.

With StressCheck® the analyst typically creates one mesh, clicks a button to run an automatic sequence of solutions of increasing polynomial orders, and uses StressCheck's built-in quality assurance tools to effortlessly check for converged displacements, stresses, strains, stress intensity factors, etc. Why make it harder than it needs to be to verify that your results are of acceptable quality? In this way, analysts can focus on finding the correct model without uncertainty about the quality of the FEA approximation.
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MeshIndependence Mesh Independence & Hierarchic Modeling In StressCheck® the modeling (i.e. idealization) errors are treated separately from the errors of approximation (i.e. discretization) so that the analyst can validate the model and verify the result independently. Other FEA programs typically have dozens of elements where StressCheck® would have just one, no matter the application. To us a quadrilateral is a quadrilateral; why would you need more than one element shape to get the job done?

StressCheck® treats the attributes of the element separately from the topology of the element unlike any other FEA code in the industry. Switching between heat transfer and elasticity, or between linear and nonlinear elasticity, for example, does not require changing elements or remeshing. That’s what we call a true hierarchic modeling framework.

With this hierarchic modeling framework in place, our formula is simple: 1 Model + 1 Mesh + 1 Mapping + 3 Hierarchic Solutions = Verifiable FEA Results
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Standardization Standardization & Democratization of FEA-Based Solutions As managers are promoted or re-assigned and as experienced engineers retire or leave for other opportunities they take with them valuable assets of the corporation: experience and know-how forged from countless design changes and analyses. These intellectual assets can be preserved and re-purposed with the CAE Handbook powered by StressCheck®.

The proper application of numerical simulation procedures requires subject expertise and expertise in computational engineering that are not common or readily available. However, it is possible to leverage both kinds of expertise through standardization of recurring analysis tasks just like handbooks and manuals have provided the expertise of specialists in applied mechanics to mechanical, aerospace, and structural engineers for decades.

The essential difference is that classical handbooks present results for parameterized problems solved by classical or empirical methods, whereas standardized CAE Handbook procedures rely on verified FEA solutions of parameterized models. This allows standardization of models that are of much greater complexity and focus to be treated as entries in a parameterized electronic handbook with greater confidence.
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Need More Information About Our Simulation Technology?

Click below for FAQ’s and Selected References about our Simulation Technology, Numerical Simulation, Finite Element Modeling, Mathematical Modeling, Simulation Governance and more.

  • Sim Tech FAQ’s
  • Sim Tech References

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Testimonials

  • “A screening of existent commercial and non-commercial tools was carried out in respect to their fracture mechanics capabilities, their design abilities, implementation as well as their complexity. Although, there are many software possibilities, only those within the reach of the author were evaluated. This resulted in the selection of the commercial tool StressCheck®. The assessment of crack propagation on compact tension and two stringer specimens governed by the Paris and Forman regimes was satisfactory compared with experimental results using the material data from simple standard specimens.”

    Lloren Llopart Prieto (EADS)
    Doctoral Thesis, "Modelling and analysis of crack turning on aeronautical structures"

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