EXHIBITIONS
production and test setup isn’t required any longer,” emphasises Andreas Radius, a calculation engineer working for Ebro. Depending on virtual net and model quality, the results lie within the tolerance range comparable to real measurements in a flow lab.
Optimisation recommendations Similar synergetic effects also are the case in the field of structural mechanics, for example samples don’t have to be produced to correct mechanical flaws. “The software is progressively becoming able to detect flaws through topology optimisations, and recommend optimisations all by itself,” explains Andreas Radius. Depending on simulation requirements, the costs are naturally also subject to rise. “The higher the degree of real conditions a simulation has to fulfil, the costlier and complex the processes become,“ adds Kohlscheen. Current 3D CAD software already comes with simple simulations, featured as an add-on. “One can already achieve very good results here”.
Several tools in a bundle Material-independent simulations in structural mechanics can, however, merely reflect component stress factors in the linear range. “For determining degrees of deformation, temperature gradation and result evaluation, special material-dependent values such as E-module, coefficient
of thermal conductivity, tensile and yield strength are required,” explains calculation engineer Radius. Depending on software
provider, the solutions on offer are standardised. “The required tools are increasingly being offered in bundles with, for instance, 3D CAD software,” reports Schröder, Mankenberg. A highly successful product: “In the last couple of years, 3D simulations have become a standard development tool. This is a requirement for fast and competitive development of a new product. Nonetheless, the costs for soft- and hardware still are “very high”. Training personnel to use the software also requires considerable investments, in addition to regular follow-up training. The various 3D tools also often require different specialists.
Degrees and training Computational simulations based on models and algorithms can also be a challenge bringing employees to their limits. Basic knowledge of 3D construction, for instance with Autodesk Inventor, is required. “In order to achieve the most realistic result, one has to take the approach of a technical engineer to properly grasp and model a technical problem in 3D, as well as usefully define the loads and edge conditions,” explains Andreas Radius, Ebro. In the end, in-depth knowledge of the software being used is a basic requirement. In general, one learns how to think
like an engineer generally when studying engineering. The software being used for 3D design, however, requires in-depth knowledge “and the implementation of training through the respective software provider of the simulation product”.
Trend towards multiphysics Hartmann Valves sees it necessary to train employees for the programmes being used. “Meanwhile using 3D programmes is standard also in vocational training for technical drafters,” states head of sales Werner Hartmann. Complex simulations are especially data rich and thus require a matching level of computing power.
Development of simulation software is an ongoing process. A current trend is towards Multiphysics, with several 3D simulation tools in a software bundle. “One advantage is that parts of the programme, for instance the mesher, can be used jointly,” explains Michael Schröter, Mankenberg. Furthermore, interface problems are reduced to a minimum.
3D prints instead of samples According to Ebro’s calculation engineer Andreas Radius, 3D printing and prototyping is an important trend. “Here, users are provided with a non-virtual sample to touch and evaluate”. The major advantage are lower costs and shorter timeframes compared to conventional sample production. Time is on the side for 3D simulations. The scope of functions is already being reduced for 2D
30 IMT December 2017
www.internationalmetaltube.com
programmes. “On the part of manufacturers, this means one will have to jump ship in the long term,” foresees Werner Hartmann. Furthermore, 3D simulations offer a lot of advantages “and will therefore establish themselves as standard”.
A promising outlook Ebro is convinced 3D simulations will be a standard. “Increasing competitive pressure entails more complex material and geometry optimisations, which cannot be managed with conventional methods of calculation,” declares calculation engineer Radius. In the meantime, both the hardware and software on offer has become more lucrative for small and medium sized businesses, and the software has become more intuitive and easier to use. Open source solutions have also become available, putting pressure on commercial software providers and their pricing models. The future belongs to
simulations. Germany’s Council of Science and Humanities also underscores this development, and sees simulations as an instrument of knowledge, unfolding itself highly dynamically. A promising perspective for valve manufacturers.
Press Contact Valve World Expo 2018 Petra Hartmann-Bresgen, M.A. Ulrike Osahon Tel: +49 (0)211 4560-541 Fax: +49 (0)211 4560 87 541 E-Mail: HartmannP@messe-
duesseldorf.de
Photo: Messe Düsseldorf/ctillmann
Photo: Messe Düsseldorf/ctillmann
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