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
The problem with a four-, five-, or six-year degree is that they don’t teach engineers the soft skills required to have a successful career. Here are seven skills that every engineering graduate needs to be successful.
A UK-based company called Ilika has developed a miniature solid-state battery to power the IoT.
A new oscilloscope-based test system adds a unique dimension to the process of analyzing the dynamic performance of three-phase motors and drives.
Design teams are operating in a business environment that increasingly requires them to collaborate and share data across extended teams, multiple organizations, and widespread locations. Autodesk’s customers are looking for a solution that eliminates project bottlenecks, such as the time-consuming and error-ridden process of shuttling design reviews and revisions back and forth among team members.
A Finland-based company has introduced what it claims is the first smart door lock that can be powered from energy harvested from a mobile device.
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