HEALTHCARE SIMULATION BENDING THE RULES
The official UK launch of Dassault Systemes’ Solidworks 2018 took place in October 2017. Solidworks CAM uses tolerance-based
machining – the use of the model definition to ensure machining strategies are automatically adjusted according to tolerance specifications. While Solidworks CAM can be used as standard CAM software – setting up operations, picking tools, setting speeds and feeds – by running in automated mode (also called “rules-based” machining), it is possible not only to generate the solid model, but generate the toolpaths and get the entire part posted and ready to cut on milling machines within a few minutes. Rules-based machining is like having a
built-in manufacturing consultant helping to make decisions for the team. It allows novice CAM users to get up to speed quickly by automating the tedious and repetitive tasks associated with most mainstream CAM software. It also aids experienced users by allowing them to program much faster. Proven machining strategies (rules),
embedded into the software, allow for faster toolpath creation – in many cases, by a factor of 5 to 10. These rules are included out of the box, but can also be easily modified while the CAM user is programming by simply changing the parameters and clicking save. Ultimately, this technology can allow
manufacturers to fully automate the design-to-manufacturing process. It also opens the door for new “build to order” possibilities, with custom parts that are automatically designed and programmed. What has traditionally required hours of engineering and CAM programming time can now be automatically designed and programmed in seconds. Trakka Pty is an Australian
manufacturer of motorhomes and special-purpose vehicles. Founded in 1973, it has forged valuable partnerships
LivingHeart to the cloud, effectively an unlimited number of tests of a new design can be carried out simultaneously using the simulated heart rather than one at a time, dramatically lowering the barrier to innovation, not tomention the time and cost.” The Stanford University teamin conjunction with SIMULIA
has developed amultiscale 3Dmodel of the heart that can predict the risk of these lethal arrhythmias caused by drugs. The teamadded capabilities to the LivingHeartModel to include highly detailed cellularmodels to differentiate cell types within the tissue and to compute electro-cardiograms (ECGs). Thismodel is now able to bridge the gap between the effect of drugs at the cellular level to the chaotic electrical
12 /// Environmental Engineering /// December 2017
Tolerance-based machining in Solidworks 2018, below; exploded diagram of the Trekka 860, middle; and flow simulation on the Trekka, bottom
with luxury van manufacturers, including Volkswagen, Fiat and Mercedes Benz, to develop pop-top campervans, van-based and coach-built motorhomes, and mobile health clinics and mobile office vehicles. Until 2004, the company employed a manual, hands-on, in-vehicle approach to developing its products, during which it would often have to wait for the release of a new vehicle to begin developing its furnishings directly within the vehicles. This approach required taking manual
physical measurements from each van model, followed by design, prototyping and fabrication of the various cabinets, furnishings, fittings and electrical and plumbing systems and components. Since implementing Solidworks
Professional design software, Trakka has reduced time-to-market for its products by half, which has helped the company double its product offering and grow its manufacturing facility, including a recent 30 per cent expansion in production floor space. Because Trakka can accurately design
to its partners’ vehicle CAD models, the motorhome manufacturer has virtually eliminated prototyping costs – replacing multiple prototyping cycles with a single pre-production model.
propagation that a patient would experience at the organ level. However, the creation of a suitablemodel requires taking a
multiscale approach that is computationally expensive: the electrical activity of cells ismodelled in high detail and resolved simultaneously in the entire heart. Due to the fast dynamics that occur in this problem, the spatial and temporal resolutions are highly demanding. The LivingHeart Project hasmushroomed tomore than 95
member organisations worldwide, includingmedical researchers, practitioners, devicemanufacturers and regulatory agencies and has supported 15 research grant proposals by providing access to themodel. EE
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