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From the website:
http://www.onlineamd.com/amd_1209_light_strong_aircraft_dassault_abaqus_isight.aspx
Anonymous author writes an article for the December 2009 issue of the magazine, AEROSPACE MANUFACTURING AND DESIGN. The article is entitled: "The Quest for a Lighter, Stronger Aircraft"
In the section of the article headed "Composite Analysis", the anonymous author writes:
"For the intact panel analysis, the Grupo TAM engineers chose Abaqus FEA from Simulia, the Dassault Systèmes brand for realistic simulation, in large part for its ability to handle both implicit and explicit non-linear analysis. “We needed more than our in-house tools to conduct the analysis,” Fernandez says. “We chose Abaqus for its extensive composite capabilities and to meet the high quality standards required by our customers.”
"They also chose Isight from Simulia for its Monte Carlo and Stochastic Design Improvement components, its sampling capability, and the ease with which it can interface with in-house software. Isight allowed the team to conduct trade-off studies with their Abaqus models and achieve rapid design optimization.
"To carry out their FEA analysis of the intact panel, the team started with nominal values typical of the aeronautics industry for all the variables. They considered three load cases, two with a uniform aerodynamic pressure on the panel – one directed towards the inside of the structure, the other directed out – and a third with a shear load directed axially across the face of the panel. The team then performed two additional analyses of damaged panels; one with a delamination in the middle of the panel, the other with two disbondings under the panel stiffeners.
"The team constructed their geometry model in CATIA v5 from Dassault Systèmes, using the following: S4R planar elements for the skin and stiffeners; the C3D8R element for the adhesive; shell composite with a single ply for the delamination analysis; and for the disbonding analysis, a homogeneous solid in which mechanical properties were reduced six orders of magnitude. The model had approximately 49,500 elements, 45,400 nodes and 272,600 variables.
"The analysis was run on a Windows server with four Intel Xeon processors, each with 64 bits and 8GB of RAM. The team conducted multiple Monte Carlo simulations, with each full cycle analysis – including nominal, delamination and disbonding analysis – taking 30 minutes.
"The results of all the FEA analyses, both for intact and damaged components, provided baseline data that were then used to optimize the design and build of the composite panel using Isight."
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