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How is plastic behaviour in metals simulated and used in practical engineering applications? What are potential difficulties and challenges in modelling plasticity problems using FE software? What are the potential errors and limitations of the FE plasticity solutions? This course gives you practical advice with a minimum of theory. Metals Material Modelling: Plasticity The course covers plasticity theories that are widely used to analyse practical engineering applications in metals. Mathematical formulations and equations are intentionally kept to a minimum. Emphasis will be placed on how engineering design incorporates these theories and how the FE method models plasticity. Difficulties encountered...more
This presentation was made at the 2019 NAFEMS World Congress in Quebec Canada Resource Abstract The expansion of the use of simulation across the product lifecycle is critically dependent on full confidence in the veracity of the results of numerical simulations. It’s not sufficient that the results are correct, the process through which the results are obtained to support business or regulatory decisions needs to be transparent, traceable, repeatable and fully documented. Traditional manual documentation methods based on notebooks and shared drives are no longer fit for purpose in a world of simulation data sets of increasing complexity distributed across virtual teams. Free format reporting...more
Presentation made by V. Balabanov, T. Lacaux, S. Georgiadis, D. Trop, M. Schemat, B. Schlaepfer, M. Frenzel, D. Heiserer at the NAFEMS Americas Conference 'New Frontiers in Product Modeling and Simulation' that was held in Seattle, Washington on 7-9 June 2016....more
These slides were presented at the NAFEMS World Congress 2025, held in Salzburg, Austria from May 19–22, 2025. Abstract There is a long history of the use of engineering simulation for design. This virtual approach is typically followed by physical prototyping, testing and refinement to reach a final design, followed in many cases by a physical testing regime to meet regulatory requirements. For many companies, the use of simulation tools has reduced the time and cost associated with getting new products to market due to the ability to explore multiple designs, and has reduced resource usage and improved product quality by enabling exploration of aspects of manufacturability and long term...more
Integrated computational materials engineering (ICME) is a term many of us will have come across, but may not be completely familiar with. What is it, and why is it of interest to the simulation community? To find out more, David Quinn spoke with Steve Arnold, Technical Lead for Multiscale Multiphysics Modelling at NASA Glenn Research Centre, and member of the NAFEMS Simulation Data Management Working Group and our Americas Steering Committee. This article appeared in the January 2023 issue of BENCHMARK...more
The "What is..." series of flyers provide an introduction to a specific method or technology and are intended to be read by engineers and scientists with no significant expertise or prior knowledge of the topic that is being discussed. This guide to "What is Verification and Validation?" was produced by the NAFEMS Analysis Managment Working Group which has since been renamed as the NAFEMS Simulation Governance and Management Working Group ....more
Mind the Gap 6-minute read Sinothile Baloyi - April 21st 2023 In 1765 James Watt improved Thomas Newcomen’s steam engine, to such an extent that he often gets incorrectly credited with inventing the whole thing himself. How did he do this? Perhaps it was simply serendipity, or could his access at a young age to his father’s shipbuilding workshops - all those hours spent building models of cranes, barrel organs, etc, and becoming intimately acquainted with their mechanics- have given the future inventor the edge? Engineering methods have moved on a lot since then. Now when you hear the word ‘model’ you don’t necessarily picture this: Wooden model of crane, pulley attached. James Watt's...more
Systems Simulation: Far-off Future or Feasible Now? by Chad Jackson, President and Principal Analyst of Lifecycle Insights Move over multi-physics. There's now a different field that qualifies as the bleeding edge of technology in simulation: system simulation. Many organizations are just starting to broach this field in an effort to better understand how systems perform holistically. But what is it? Is it really feasible for practical use today? Let's dive in and discuss. Setting Baselines: Systems Engineering Terminology can be such a challenge. So before we go barreling off to talk about the questions above, let's set some baselines. To start, if you're unfamiliar with systems engineering,...more
The Case for Reckless Engineering 6-minute read Sinothile Baloyi - February 28th 2023 Remember when you were a child and built entire worlds out of just your imagination and some LEGO® bricks, sticks, rocks, or whatever you could lay your hands on? You knew you were building something , but often, at the very beginning, you didn’t know exactly how it was going to turn out. Sure, LEGO bricks often come with instructions for a specific thing, but if you were anything like most kids, you’d build that thing then wreck it all and build something completely made up, and then you’d do it again and again. I once offered my friend’s seven-year-old a boxed LEGO set of a model car, ready to be...more
The Stakes are High; Time to up Your Game Modelling and Simulation of Cyber-physical Systems 5-minute read Sinothile Baloyi - February 22nd 2024 In 2006 Dr Helen Gill, then program manager of the United States National Science Foundation (USNSF) coined the term Cyber-physical Systems . Before that, we had Cybernetics, a term invented by mathematician Norbert Wiener. And before that we had the Greek word kybernan; to steer. So cyber-physical systems are, therefore, systems involving the steering of physical entities of some kind. A lot like you, with your nervous system forever in a feedback loop with the rest of your physiological systems, making endless decisions that translate into...more
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