HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Engineering Materials

Aerospace Fasteners Mix It Up

NO RATINGS
< Previous Page 3 / 3
View Comments: Threaded|Newest First|Oldest First
TJ McDermott
User Rank
Blogger
Repairs of composites
TJ McDermott   11/8/2012 10:30:47 AM
NO RATINGS
Ann, while composites may cause fewer fasteners to be used in original manufacture, I would expect their use to be undiminished for composite repairs.

Ann R. Thryft
User Rank
Blogger
Re: Repairs of composites
Ann R. Thryft   11/8/2012 12:31:07 PM
NO RATINGS
That's true of course. The question is, given an increase in composite use, whether fasteners will be used in high enough quantities in repair to make up for the lower overall quantities in manufacturing.

ttemple
User Rank
Platinum
Where is the picture?
ttemple   11/8/2012 3:58:21 PM
NO RATINGS
Ann,

Is that picture from Textron in Nashville?

 

Ann R. Thryft
User Rank
Blogger
Re: Where is the picture?
Ann R. Thryft   11/9/2012 12:16:51 PM
NO RATINGS
ttemple, my sources did not divulge the locations of the aircraft assembly photos, probably due to customer NDA requirements. But feel free to guess!

bobjengr
User Rank
Platinum
Aerospace Fasteners
bobjengr   11/11/2012 2:38:46 PM
NO RATINGS
 

Excellent post Ann.  I know the longevity of any fastener is dependent upon the application and use.  Relative to composite fasteners, do we know how they "stack up" relative to metal fasteners?  I have seen no data that tries to correlate life cycles of either type.  Great point also about the grounding of composites.  I know this must be a huge issue but not talked about too much in the literature. 

Ann R. Thryft
User Rank
Blogger
Re: Aerospace Fasteners
Ann R. Thryft   11/12/2012 11:56:51 AM
NO RATINGS
Glad you liked the article. The whole issue of the grounding of composites used in aircraft has been widely misunderstood, so I thought it was a good idea to include some clear discussion on that issue. Could you clarify your question about comparisons between fasteners for composites and fasteners for metal? What sort of comparisons do you have in mind?

Cabe Atwell
User Rank
Blogger
Re: Aerospace Fasteners
Cabe Atwell   11/21/2012 4:13:58 PM
NO RATINGS
I never thought that lightening strikes on aircraft was so common. I read that it happens 2 times per year on average, per airplane. I have seen electrical discharge responsible for fastener loosening and in some cases, ejecting.  

There is a downside to composite pieces, price. Bolting parts together will always be around. I designed a mechanical system that ended up having over 60 bolts.. it was cheaper than with none, that was for sure.

C

http://usatoday30.usatoday.com/travel/columnist/getline/2005-08-29-ask-the-captain_x.htm

Ann R. Thryft
User Rank
Blogger
Re: Aerospace Fasteners
Ann R. Thryft   11/26/2012 12:03:55 PM
NO RATINGS
The lightning strike issue isn't about frequency so much as it is about catastrophic results. If you've only got a (for example) 1% chance of something happening, but that something has catastrophic results--people dying, lawsuits--then that's something you've got to protect against, or at least not encourage, in your materials and assembly process selection.

Partner Zone
More Blogs from Engineering Materials
HP revealed more of its 3D printing plans in a recent webinar. Senior vice president of inkjet and graphics solution business Stephen Nigro spoke about how the technology works and expanded on HP's vision of open collaboration to commercialize its Multi Jet Fusion 3D printing technology for end-production, and open collaboration on new materials. He also said HP will create software to help users decide when to use Multi Jet Fusion versus conventional subtractive manufacturing.
A lightweight electric urban concept car designed by several European companies weighs only 992 lb without its battery. It would have weighed 26.7 lb more if its windows were made of glass instead of the specially coated LEXAN polycarbonate resin from SABIC Innovative Plastics.
Skylar Tibbits' team in MIT's Self-Assembly Lab is now 4D printing self-assembling shapes made of programmable carbon composites and custom wood grain. The composites are being used in a sport car airfoil, and the wood grain is beautiful.
The NanoSteel Company has produced high-hardness ferrous metal matrix composite (MMC) parts using a new nanosteel powder in a one-step 3D-printing process. Parts are 99.9% dense, crack-free, and with wear resistance comparable to M2 tool steels.
After a year or so of missteps, false starts, retractions, and postponements, inkjet office printer giant Hewlett-Packard has finally revealed just what it plans to do in 3D printing.
Design News Webinar Series
11/19/2014 11:00 a.m. California / 2:00 p.m. New York
11/6/2014 11:00 a.m. California / 2:00 p.m. New York
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.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.
Dec 1 - 5, An Introduction to Embedded Software Architecture and Design
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


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.
Last Archived Class
Sponsored by Littelfuse
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service