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
Lockheed Martin is looking to a new novel alloy and casting process to cut expenses on the F-35 Lightning II -- the world's costliest fighter jet.
After impressive test results, QM Power's Q-Sync fan motor has been identified as an emerging energy-saving technology and earned additional funding from the Department of Energy.
Henn'na Hotel, a next-generation, eco-friendly hotel in Nagasaki, Japan, is staffed almost entirely by robots.
With the pace of new editions and iterations, designers can fall behind quickly on software knowledge and skills. That's where JIT software training comes in.
After more than a century of dedicated service, metals are still upping their game and delivering lighter, stronger bodies and frames to the auto industry.
More:Blogs|News
Design News Webinar Series
6/25/2015 11:00 a.m. California / 2:00 p.m. New York
6/24/2015 11:00 a.m. California / 2:00 p.m. New York
6/11/2015 11:00 a.m. California / 2:00 p.m. New York
8/13/2015 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Aug 3 - 7, Developing, Testing, and Troubleshooting IPv4 and IPv6 Using Wireshark
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7


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.
Next Course August 25-27:
Sponsored by Stratasys
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service