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January 7, 2009
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Have you made any resolutions for 2009? If they include furthering
your engineering knowledge, either to make yourself indispensible at
work or to expand your career options, check out the on-demand
webinars at MachineDesign.com
Some of the materials-related stories we published recently include help
on impact-modeling for plastics, ways to design color into your products, and a brazing technique for copper heat exchangers. Don't
forget to scroll down for some recently released products, and some industry
news.
Let us know what you're up to in 2009 by email or on our forums.
Jessica Shapiro
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If you want a crash simulation involving plastics to yield useful
results, it is important to model the material behavior appropriately.
The high strain rates have a significant effect on the properties and
failure can be ductile or brittle in nature, depending on a number of
factors And although the LS-Dyna solver is mentioned and used
frequently, the ideas here are applicable to other FEA software as
well.
Polymers are complex materials with mechanical properties that vary with
stress level, time (rate), temperature, and other parameters. This means
plastics perform in a nonlinear way that is not easily captured by
conventional material models with roots in metals theory.
Read the full article.
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FREE FRICTION CD FROM GENERAL
MAGNAPLATE
 Increase
the life of metal components with a FREE CD-ROM from General Magnaplate.
The easy-to-use CD assists design engineers in selecting permanent
coatings that prevent wear, friction, corrosion, sticking, galling, and
chemical attack on ferrous and nonferrous metals. The CD resource
compares the static and kinetic coefficient of friction (COF) of
numerous metals with 20 Magnaplate-applied 'synergistic' coatings.
General Magnaplate's surface enhancements become an integral part of the
metal providing permanent, superior performance.
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My anodized-titanium card case is deep blue when I hold it normal to
my line of vision. But rotating the case changes its color, eventually
reaching a nice shade of violet. Why does the object change color?
Anodized-aluminum parts, for example, look the same at any angle. The
answer lies in the behavior of light and its interaction with the
microscopic structure of anodized-aluminum or titanium surfaces.
Read the full article.
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Remember when copper, not aluminum, was commonly used in mobile air
conditioning? In addition to being odor-prone, aluminum has lower
thermal conductivity and strength than copper. Which begs the question:
Why was it phased out over the past 30 years?
Read the full article.
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Minuteman Series Teflon composite bearings are self-aligning and
self-lubricating. They have a low coefficient of friction, dampen
vibration, and tolerate shock. They can be submerged, washed down with
water, high-pressure steam, or chemicals, and operate in harsh
abrasive-contaminated environments.
Closed or open-style configurations in 12 sizes from ¼ to 4-in. ID are
available. The bearings have 100% contact with the shaft and will not
score aluminum shafting.
LM76
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Pureloc compression fittings, for mating fluoropolymer tubing, are
made from virgin-grade, chemically inert PFA. They offer unrestricted
flow, as well as lock and sealability.
The precision-made fittings consist of four parts — nut, gripper,
ferrule, and body. The nut’s ridged surface makes it easy to tighten.
The see-through body lets users check installation. Available styles
include elbows, straight connectors, tees, and adapters. Sizes range
from 1/8 to ¾ in.
NewAge
Industries Inc.
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Graphalloy bushings and bearings can withstand temperature from
cryogenic to 1,000°F and are dimensionally stable when submerged or
under load — applications where oil, grease, and plastic fail. The
components, made from a graphite/metal alloy (molten metal, graphite,
and carbon), are self-lubricating, a key feature in applications where
maintenance operations are infrequent or difficult.
Graphite Metallizing
Corp.
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High Performance Alloys gets ISO
nod
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High Performance Alloys, Inc., became certified to the ISO 9001:2000
Quality Management Systems standard November 2008. The certification was
conferred after an audit by National Quality Assurance-USA (NQA-USA).
The company manufactures and distributes cobalt, stainless steel, and
nickel-based alloys. The certification coincides with the company's 25th
year in business.
For more information contact High Performance Alloy.
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PolyOne products comply with new
product safety law
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PolyOne, a manufacturer of specialty polymers, listed its products
that will comply with the Consumer Products Safety Improvement Act
(CPSIA). The law, expected to take effect in the U.S. February 10, 2009,
bans some phthalates in toys and other children's products. The act will
also ban the use of lead in any children’s product, a standard which
RoHS-compliant materials already meet.
PolyOne's OnColor masterbatches for vinyl, Geon vinyls, Wilflex inks,
alternative plasticizers, engineered thermoplastics, and rigid vinyl
compounds are among the products that comply with the new
regulation.
For more information contact PolyOne.
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First Cut
CNC machined parts in 1-3 business days. Get parts with better material
properties, surface finishes and dimensional properties than additive
rapid prototypes. Visit www.firstcut.com
Protomold
Turn your 3D CAD model into real plastic parts in one business day!
Visit www.protomold.com for information and a free automated
ProtoQuote®. www.protomold.com
Boker’s Free 2009 Washer Catalog
Boker’s 2009 Washer Catalog has over 23,000 non-standard sizes with
outside diameters of 0.080" to 5.140", numerous IDs and thicknesses and
2,000 material variations. ISO 9001:2000 Registered
www.bokers.com/mde
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