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
A small team of engineers has created a tackling dummy robot that's comparable to training with human players on the football field.
Several plastics and elastomers have come out recently for different parts of cars, as well as for multi-material medical devices and for onboard base station antenna components.
Work in embedding conductive materials into commercially available yarn could lead to energy textiles that store power for use.
A ball bearing developed for turbofan engines by FAG Aerospace of Germany and MTU Aero Engines could have other uses such as turbines, pumps, and gearbox stages.
Fifty-six-year-old Pasquale Russo has been doing metalwork for more than 30 years in a tiny southern Italy village. Many craftsmen like him brought with them fabrication skills when they came from the Old World to America.
More:Blogs|News
Design News Webinar Series
8/13/2015 11:00 a.m. California / 2:00 p.m. New York
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
9/10/2015 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 31 - Sep4, Embedded System Design Techniques™ - Writing Portable and Robust Firmware in C
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 MICROMO
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