HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Comments
View Comments: Newest First|Oldest First|Threaded View
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.

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   11/12/2012 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?

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: 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!

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: 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.

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.



Partner Zone
Latest Analysis
Some cars are more reliable than others, but even the vehicles at the bottom of this year’s Consumer Reports reliability survey are vastly better than those of 20 years ago in the key areas of powertrain and hardware, experts said this week.
While risk management sounds like one activity, in order to be conducted effectively, it must be broken down into three sub-components: risk assessment, risk monitoring, and response planning.
Many of the materials in this slideshow are resins or elastomers, plus reinforced materials, styrenics, and PLA masterbatches. Applications range from automotive and aerospace to industrial, consumer electronics and wearables, consumer goods, medical and healthcare, as well as sporting goods, and materials for protecting food and beverages.
In a speech at China's National People’s Congress in Beijing this month, Premier Li Keqiang laid out plans to revamp the country's manufacturing infrastructure with advanced technology.
While many larger companies are still reluctant to rely on wireless networks to transmit important information in industrial settings, there is an increasing acceptance rate of the newer, more robust wireless options that are now available.
More:Blogs|News
Design News Webinar Series
2/25/2015 11:00 a.m. California / 2:00 p.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
12/10/2014 8:00 a.m. California / 11:00 a.m. New York
3/31/2015 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.
Mar 30 - Apr3, Getting Hands-On with Cypress’ PSoC
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  67


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

Sponsored Content

Technology Marketplace

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