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Quadrilateral mesh generator for complex curved and flat surfaces.
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What is QUAD-SURFACE?
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One of the most challenging problems in modern engineering is
conversion of geometric data produced by CAD systems into finite element
meshes acceptable for futher analysis. Thin shells and plates of complex
shapes comprise a very large proportion of structures arising in
engineering industries, particularly automotive and aeronautical. Analysis
- with high degree of precision - of stresses, natural frequencies and
other mechanical properties is absolutely vital; this
is because if numerical results are "too approximate" then the structure
will be either too heavy (if the actual stresses are lower than calculated
ones), or not posssesing required strength (in the opposite case).
Quadrilateral finite elements deliver very
accurate numerical results. For that reason a quality mesh generator
allowing 100% quadrilateral meshing of surfaces in 3D represents a
necessary part of any commercial-quality FEA system.
QUAD-SURFACE 2.8 was developed to directly address that problem; it
is the newest addition to the full range of
our state-of-the-art quadrilateral mesh generation products.
QUAD-SURFACE 2.8 is a mesh generator capable of delivering exceptionally
accurate finite element meshes for a broad range of surfaces in 3D such
as: plane, cylindrical, spherical, general 3D, surfaces of revolution, as well as
their arbitrarily complex spacial combinations. For complex, real-life
surfaces in 3D, QUAD-SURFACE 2.8 allows generation of 100% quadrilateral
meshes of very high quality. In turn, the later will guarantee that the
consequent finite element analysis delivers excellent numerical results.
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What advantages does QUAD-SURFACE 2.8 have ?
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QUAD-SURFACE 2.8 allows:
meshing of complex plate and shell structures in 3D space,
consisting of flat, cylindrical, spherical components, surfaces of
revolution and also general-case 3- and 4-edged patches;
meshing of non-homogeneous domains, consisting of multiple
plates and shells with different physical and/or geometrical
properties;
generation of Lagrangian and serendipity meshes on spatial surfaces.
In many cases such surfaces are made of composite materials, often
consisting of several anisotropic layers. The additional nodes of
8-noded serendipity and 9-noded Lagrangian elements are always placed
on the surface, thus preserving as much as possible the original shape
of the surface. Whereas 4-noded bilinear finite elements often deliver
acceptable results for nodal displacements only, the surface shape
preservation is absolutely necessary for obtaining accurate evaluation of the stress tensor components.
easily readable and convenient description of geometrical models;
fully automatic processing, requiring no interference from
the user.
In terms of input data preparation, the major advantage of QUAD-SURFACE 2.8
is that its data format and corresponding internal structures allow
description of highly complex designs as arbitrary combinations of flat
components, parts of cylinders and/or spheres, surfaces of revolution
and, most importantly, general-case three- and four-edged patches.
At the same time, the data structures are simple and natural, allowing
straightforward incorporation of QUAD-SURFACE 2.8 into full-scale FEA
systems. Processing is fully automatic: no user interference is
required during the meshing process, regardless of the actual complexity
of particular input data.
Below we provide a number of difficult to produce meshes that have been
successfully generated by QUAD-SURFACE 2.8. We invite you to contact us
if you would like to obtain more examples or need additional information;
our contact details are placed at the end of this page.
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Example 1. Curved and flat surfaces.
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Example 2. Surface of revolution.
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Among the huge variety of thin-walled shells encountered in the modern
engineering, surfaces of revolution occupy a very special place: there are
domes, pressure vessels, balloons and many others.
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Example 3. Helicoid.
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Example 4. Tubular joint.
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Tubulat joints represent one of the most common structural components
encountered in the offshore engineering models. Being a general-case
surface mesh generator, QUAD-SURFACE 2.8 creates quality, 100%
quadrilateral meshes on tubular joints; at the same time, it allows
other parts of complex shell constructions to be attached to one or
several joints.
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QUAD-SURFACE 2.8 is available with complete source codes
and full commercial lisence allowing incorporation into your own
applications at the source code level.
All our codes are written in ANSI C and will compile and run on any UNIX
and Windows platform, without changes to the source code. They are also
fully commented, allowing easy modification at user's discretion.
QUAD-SURFACE 2.8 is available on no-royalties and
no annual renewals basis: there is a on-off price for the
unlimited commercial lisence.
QUAD-SURFACE 2.8 standard distribution kit includes:
- fully-commented source codes of the program in ANSI C,
- User Manual containing detailed description of input and output
data structures and an example driver program;
- a graphical application that allows displaying domains
that are to be meshed, as well as generated quadrilateral meshes.
QUAD-SURFACE 2.8 is completely developed by our company and contains
no third party code.
Finally, our "try-before-you-buy" policy. If you send us
several examples of your domains, we will run QUAD-SURFACE 2.8
and send you the generated meshes. If you are satisfied with results,
you can then buy QUAD-SURFACE 2.8.
To learn more about our full range of products please follow this
link.
We also invite you to contact us with any questions, preferably by e-mail on comecau@comecau.com.
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