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Computational Mechanics

Home Tag Computational Mechanics
Trustworthiness in Simulation: Credibility or Decision-grade Reliability?

Trustworthiness in Simulation: Credibility or Decision-grade Reliability?

May 4, 2026

Compliance with ASME and NASA standards on verification, validation, and uncertainty quantification (VVUQ) is often taken as sufficient evidence that simulation results can be trusted. This is a mistake, however. Compliance alone does not answer the question that truly matters to decision-makers: Are the predictions reliable enough for the decision at hand?

Beyond the Black Box: Explainable AI Requires Explainable Simulation

Beyond the Black Box: Explainable AI Requires Explainable Simulation

Apr 7, 2026

AI is rapidly transforming engineering workflows. However, a fundamentally important issue rarely gets discussed: AI explanations are only as trustworthy as the simulations they rely on. This blog post explores the rigorous technical requirements that must be met to ensure that numerical simulations provide the transparent, machine-interpretable evidence that explainable AI demands.

Turtle Shells and Legacy Finite Element Codes: Evolutionary Constraints in the Age of Explainable AI

Turtle Shells and Legacy Finite Element Codes: Evolutionary Constraints in the Age of Explainable AI

Mar 18, 2026

This blog post explains why legacy finite element codes are like a turtle’s carapace: a protective structure that provided a survival advantage in the resource-scarce 1960s but now impedes the flexibility needed to meet the demands of explainable AI (XAI). The good news is that the technology required to support XAI already exists.

The Differences Between Calibration and Tuning

The Differences Between Calibration and Tuning

Jan 7, 2026

Anyone who relies on information generated through numerical simulation must know the difference between calibration and tuning, and understand the interactions between finite element modeling and finite element analysis. This blog post covers the main points.

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  • Trustworthiness in Simulation: Credibility or Decision-grade Reliability?
  • Beyond the Black Box: Explainable AI Requires Explainable Simulation
  • Turtle Shells and Legacy Finite Element Codes: Evolutionary Constraints in the Age of Explainable AI

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  • “The p-type element has been used to great advantage in the finite element system ESRD StressCheck, [26]. This software provides the engineer with the means to conduct solution verification in an extremely straightforward manner by simply increasing the degree of the element, monitoring convergence and using Richardson extrapolation reliably to estimate the error. This can be conducted automatically by the software thereby enabling the engineer to concentrate on the engineering rather than the simulation. StressCheck has also been used to develop ESRD’s Handbook and Toolbox applications. The first of these provides engineers with a repository of parameterised standard problems of the type found in texts like Roark’s “Formulas for Stress and Strain”, [27]. The second, Toolbox, is a tool that can be used to parameterise a company’s range of components for rapid and reliable analysis by non-expert analysis. Toolbox then is an exemplary of the way in which the democratisation of simulation can be applied.”

    Angus Ramsay, PhD
    Engineering Director, Ramsay Maunder Associates

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“At DST Group, we have effectively used StressCheck over the last 10 years to determine accurate stress intensity factors. The results have been used to improve our residual strength and structural life estimates for aircraft in service with the Royal Australian Airforce, including C-130, P-3C and F/A-18 A/B. We have found it to be extremely easy to use and a very versatile code with which to create parametric models.

We have recently used StressCheck to obtain improved stress intensity factor solutions (Improved stress intensity factors for selected configurations in cracked plates and Improved stress intensity factors for a single corner crack at a loaded fastener hole) for five key generic configurations. These transferable parametric results have been published externally. One specific example is the non-linear contact analysis of a cracked, filled fastener hole, with both fastener and remote plate loading.”

Dr. Manfred Heller, Head, Structural & Damage Mechanics, DST Group

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