George Laird's blog

China News - LS-DYNA Implicit Class

LS-DYNA is historically known as the world's best explicit analysis code or the leader in the finite element analysis of nonlinear transient events. During the last ten years, LSTC (the manufacturer of LS-DYNA) has heavily invested in the development of its implicit anlaysis capabilities. Today, LS-DYNA can seamlessly handle complex, nonlinear analyses from static (implicit) to transient (explicit). Predictive Engineering has developed training course materials that covers both the implicit and explicit sides of the code. It was with pleasure that we taught a course in Shanghai, China to 27 students from industry and academia. This three day LS-DYNA training course was focused on LS-DYNA's implicit analysis capabilities from linear, elastic static stress analysis to static nonlinear analysis to fully, transient nonlinear analysis. The course finished with a half-day training on the linear dynamics capabilites of LS-DYNA.

 

Predictive Engineering LS-DYNA Implicit Class Photo - Shanghai China September 5-7 2018

 

15th LS-DYNA International Conference & Users Meeting

Every year, Predictive Engineering attends an LS-DYNA Conference, this year it was in Dearborn, MI and next year, it’ll be in Koblenz, Germany. The technical sessions covered a broad range of topics from "How To's" to new numerical algorithms to validation work between experimentalists and theoreticians. For me personally, these were the three stand-out talks:

(i) Modeling & Simulation Challenges at the Interface between Man and Machine: Medical Devices by Dr. M. Palmer
(ii) Modeling of a Cross-Ply Thermoplastic for Thermoforming of Composite Sheets in LS-DYNA by K. White and
(iii) An Enhance Assumed Strain (EAS) Solid Element for Nonlinear Implicit Analysis by T. Borrvall.

The first paper was by Medtronic and the background gossip is that they are moving away from other commercial solvers to focus on just LS-DYNA due to its multi-physics capabilities and especially its strong nonlinear implicit performance. The second paper was a stunner and showed how thermoplastics can easily reach their glass transition temperature under moderate strain rates. In essence, whenever composites are simulated under dynamic environments, one should consider temperature effects on the resin and how it will lower its elasticity. The third paper was just plain fun mechanics and how LS-DYNA is continually expanding its capabilities in the implicit arena.

Safe Design Analysis for Power Plant Gas Turbine Operation

CFD and FEA services is our core business and has been for more than 20 years. Recently we just completed a coupled computational fluid dynamics (CFD) and finite element analysis (FEA) project on a water injection system (wet compression device) to an existing gas turbine. The energy physics of this turbocharger is to spray water droplets into the inlet of the compressor side of the turbine thereby increasing the density of the already 100% saturated air. This heavy air mixture is then combusted with increased gas flow, yielding a 10% boost in energy output from the turbine.

CFD Consulting Services - Safe Design Analysis for Power Plant Gas Turbine Operation

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George Laird's blog | Predictive Engineering

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