Guest Blogs

Understanding Fatigue Failures

< Previous Page 2 / 2
View Comments: Oldest First|Newest First|Threaded View
<<  <  Page 3/3
User Rank
understanding fatigue failures
vimalkumarp   4/11/2012 11:43:11 AM
i am sure you will find the book cradle to cradle very interesting. It is really an eyes opener

Ann R. Thryft
User Rank
Re: Mastering the art of designing for fatigue
Ann R. Thryft   4/11/2012 12:57:12 PM

Dave, thanks for that input. The attitude is one that is, unfortunately, prevalent in several industries. Glad to hear that there are movements to open up things more in materials engineering. Industry associations can play a big part in such efforts.

Scott Orlosky
User Rank
Re: Mastering the art of designing for fatigue
Scott Orlosky   4/14/2012 7:11:19 PM
Thanks for highlighting the fatigue failure mechanism in an new way.  Interestingly enough the same design approaches that reduce stress risers for fatigue failure generally also improve the performance of a part in heavily loaded, non-cyclical stress situations.  Good design practice often yields multiple performance benefits.

User Rank
Re: Mastering the art of designing for fatigue
David12345   4/17/2012 6:06:41 PM
Yes, we work with ultrasonically driven dental tool manufacturing.  You can quickly reach a fatigue failure at 30KHz if you have a surface finish that can initiate crack propagation.  Excellent article.

I used to get frustrated by friends in my car hobbies discussing bolt failures of rperformance cars. Classic examples were the failures of the Corvette suspension bolts at the ends of the leaf springs. In many cases these were fatigue failures and the friends reactions were to the effect that "these are grade 8 bolts with very high tensile strength, you cannot get better than that!"  Often these high strength bolts failed from brittle crack propagation from fatigue not from gross overstress. Salt pitting corrosion was often the culprit. The strength was less importent than corrosion resistance and anodic zinc plating. Sometimes aircraft hardware with controlled geometry under the head, good thread root shape, and good hole preparation was also helpful.

<<  <  Page 3/3
Partner Zone
More Blogs from Guest Blogs
Practically all electronic devices today contain metals that may be coming from conflict-ravaged African countries. And political pressures will increasingly influence how these minerals are sourced and used in products.
Conformal coatings present themselves as space-saving alternatives to enclosures for protecting the circuit boards of automotive electronics. They can also provide electrical insulation.
Design for manufacturing (DFM) in mold production means that mold designers evaluate the manufacturability of their molds in the early stage of mold development by collecting all relevant information and applying it to their designs. They also have to consider many other factors, including flow balance, structural stress, and assembly tolerance, in order to ensure successful molding production.
Some adhesives provide strong structural bonds but take hours to fixture and attain handling strength. The technologies that offer the fastest cure do not bear loads or withstand stresses. A new class of adhesives aims to make both stick.
The continued growth of wireless health is a near-certainty. And engineers will be the key to developing and advancing technology solutions.
Design News Webinar Series
11/10/2015 11:00 a.m. California / 2:00 p.m. New York
10/29/2015 11:00 a.m. California / 2:00 p.m. New York
10/20/2015 8:00 a.m. California / 11:00 a.m. New York
12/2/2015 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.
Jul 6 - 10, Building Raspberry Pi Controllers with Python
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.
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