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Technical data invaluable in aiding modeling and design
AKRON, OHIO [January 24, 2007] – ExxonMobil Chemical has introduced a new
finite element analysis (FEA) database for Santoprene™ specialty products for
semi-dynamic applications. Meanwhile, the database for static applications
that has been available for over 15 years has been updated. Both sets of data
are invaluable for modeling Santoprene thermoplastic elastomers (TPEs) as they
can help predict the behavior of non-linear elastomer materials.
“Because TPE materials exhibit non-linear characteristics and components made
from these materials are often designed to experience high non-linear strains,
they present certain challenges when modeling. Using genuine real-world test
data is the basis on which accurate simulation can be achieved. With about
300 grades of Santoprene TPEs, these databases represent a significant
investment and demonstrate our ongoing commitment to improving elastomer
modeling and design,” explained Thierry Burton, worldwide design supervisor
ExxonMobil Chemical’s Santoprene specialty products.
Knowing which database to use is very important and completely application
dependent. If the application is actuated numerous times over its life, then
the semi-dynamic data is applicable. ”Using the wrong dataset could result in
over- or under-predicting the mechanical behavior of the application by 25% or
more. We believe it’s important to provide cyclic data as many applications
exhibit semi-dynamic or dynamic behavior and the cyclic model provides much
more accurate predictions. When combining this data with our extensive data
on stress relaxation, the design engineer has the tools to more accurately
predict dynamic application performances over the life of the part,” said Ward
Narhi senior design engineer, ExxonMobil Chemical’s Santoprene specialty
products.
The new FEA database for semi-dynamic applications initially starts at 23°C.
This data was obtained by cycles of loading-unloading in the three modes of
deformation - tension, compression and shear - up to the attainment of
steady-state conditions which are met after a minimum of three to five cycles
of deformation. These are used by design engineers in the structural analysis
of semi-dynamic applications, like most weatherseals. Test data for
Santoprene rubber grade 101-80 is available on the
website, while information relating to other grades can be obtained via
the Santoprene AnswerPersonSM service (1-330-849-5272 or 1-800-305-8070.)
Available to designers for many years, the FEA database for static application
has been fully upgraded and is available on the website. Data from testing at
23°C of all standard Santoprene TPE grades from 35 Shore A to 50 Shore D have
been made available in a three page document with information related to
constraints in tension and compression. FEA material models are available to
design engineers, as well as the strain range of fittings with graphs. Some
data at temperatures lower and higher than 23°C are also available on request
from the AnswerPerson.
About Santoprene™ specialty products
Santoprene™
specialty products, produced by affiliates of ExxonMobil Chemical, are
recyclable elastomers commonly used in appliance, automotive, consumer goods,
plumbing, and other applications. ExxonMobil Chemical’s Santoprene specialty
products are the global leader in engineered TPEs, materials with the
performance of rubber and the processing ease of plastic. Santoprene products
are part of a broad portfolio of elastomers from ExxonMobil Chemical providing
innovative elastomeric solutions combined with global support service in
material selection, design, processing, and supply chain management, plastics
technology, product quality and customer service with marketing operations in
more than 150 countries around the world. For more information visit
www.santoprene.com and
www.exxonmobilchemical.com.
Note to Editors:
1. Santoprene is a trademark of an Exxon
Mobil Corporation affiliate.
2. The term "ExxonMobil Chemical" refers collectively to some or all of the
companies affiliated with Exxon Mobil Corporation which have chemical
manufacturing and/or marketing operations around the world.
3. Further information on engineered thermoplastic elastomers and vulcanizates
can be obtained from www.santoprene.com
.
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ExxonMobil News Media Desk: 281-870-6607
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