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Civil-Comp Proceedings
ISSN 1759-3433 CCP: 68
DEVELOPMENTS IN ENGINEERING COMPUTATIONAL TECHNOLOGY Edited by: B.H.V. Topping
Paper V.1
Dimensional Addition of Beam Models A.G. Casement+, C.G. Armstrong+, D. Milne# and D. Robinson*
+Department of Mechanical and Manufacturing Engineering
A.G. Casement, C.G. Armstrong, D. Milne, D. Robinson, "Dimensional Addition of Beam Models", in B.H.V. Topping, (Editor), "Developments in Engineering Computational Technology", Civil-Comp Press, Edinburgh, UK, pp 57-62, 2000. doi:10.4203/ccp.68.5.1
Abstract
A commonly accepted practice within product development
is to create an idealised 1D/2D analysis model to confirm a
concept, before time and money is expended in full-blown
3D solid modelling. If the concept proves unfeasible, then
modifications or even a complete re-think can be made with
the minimum loss in resources. However, if the concept is
appropriate a certain amount of time is still wasted as the
designer has to re-construct the model in 3D. To minimise
this loss, the notion of 'Dimensional Addition' is proposed,
in which the element geometry and sectional attributes are
used to sweep out the 3D body. With this aim, the FLESH
program is discussed, which applies Parasolid modelling
functions to a 1D mesh (stored in a Nastran bulk data file).
Examples of the resulting 3D sweeps are illustrated, together
with the advantages they give in visualising the analysis
input. However, it has also been recognised that creating 3D
bodies from a mesh is limited; giving only a piecewise linear
representation. A proposal for fleshing directly from analysis
geometry and associated attributes is therefore discussed, as
the next practical advancement for this research.
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