HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
News
Materials & Assembly
Strong, Flexible Composite Combines Minerals, Thermoplastic
12/20/2012

Eovations's mineral/thermoplastic composite has a modulus of elasticity between 500,000 psi and 800,000 psi, but a modulus of rupture of zero. It can flex extremely well, but does not have a catastrophic failure mode.   (Source: Eovations)
Eovations's mineral/thermoplastic composite has a modulus of elasticity between 500,000 psi and 800,000 psi, but a modulus of rupture of zero. It can flex extremely well, but does not have a catastrophic failure mode.
(Source: Eovations)

Return to Article

View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 3/3
Cabe Atwell
User Rank
Blogger
Re: "The modulus of rupture is zero"
Cabe Atwell   12/20/2012 3:37:29 PM
NO RATINGS
Which is worse for the environment, manufacturing these composite materials or logging the equivelent amount of wood?

I like the idea of composite bridges and buildings though. Perhaps people would not have lost that much with Hurricanes Katrina or Sandy. I'm sure the current cost differences will keep the materials out of construction for years to come.

C

Dave Palmer
User Rank
Platinum
"The modulus of rupture is zero"
Dave Palmer   12/20/2012 1:32:19 PM
NO RATINGS
Okay, I'm pretty sure that "the modulus of rupture is zero" is not a correct statement.  "Modulus of rupture" is a measure of the load-carrying capacity of a beam.  A material with a load-carrying capacity of zero would not be very useful.

The modulus of rupture formula is only correct up to the elastic limit, so presumably the meaning of the statement is that it yields before it breaks.  That's also how I'd interpret the rather amazing statement that "it does not have a catastrophic failure mode."  If it doesn't fracture under any circumstances, it's be a miracle material, and they should be contacting physics journals rather than Design News.  But I think they are just saying that it yields before it breaks.

That being said, this sounds like a pretty neat material.  Mineral-filled polypropylene is a fairly common (and reliable) engineering material.  However, making it into an open-cell foam, and drawing it so that the polymer chains are oriented, is an interesting innovation.

naperlou
User Rank
Blogger
Better wood than wood
naperlou   12/20/2012 12:17:41 PM
NO RATINGS
Ann, this is an interesting material.  It is impressive that it can be used like wood, using the same tools and fasteners.  That should make acceptance easier.  The hurricane resistance should be of much interest in areas where that is a problem.  I know someone with a place in Florida, and although the structure is concrete and quite resistant, they had to replace windows with bullet proof ones.  Other structures, those with conventional roofs, are a real problem.  This material would help. 

<<  <  Page 3/3
Partner Zone
Latest Analysis
You didn’t become an engineer on your own, junior.
An electronic, vibrating shoe insole developed by the Wyss Institute at Harvard has been shown to enhance athletic performance as well as provide therapeutic benefits.
A researcher at the Iowa State University has developed biodegradable fabric from a byproduct of kombucha tea that is similar to leather and can be used to create textiles.
Do you long for the days of retro video gaming? Here's how you can turn an old PC into an old-school arcade cabinet with only $100 and a bit of woodwork.
A Vienna, Austria-based startup called Heliofloat has designed a platform of solar panels that can be deployed in lakes or oceans to generate solar-based electricity.
More:Blogs|News
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
May 2 - 6, Embedded System Design Techniques™ - Rapid Prototyping Embedded Systems using Micro Python
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Technology Marketplace

Copyright © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service