Search for mechanical design articles

Monday, December 5, 2011

Column Design (Part 5)

Posted by Suparerg Suksai
From [Column Design (Part 4)], the Euler formula has been introduced. But when the slenderness ratio KL/r is less than the transition value Cc, then column is short, and the J.B. Johnson formula should be used. If we use Euler formula for the short column, it would predict too high critical load than it really is.

The J.B. Johnson formula is as follows:

From the J.B. Johnson formula we can see that the critical load for the short column is affected by the strength of the material (Sy) in addition to its stiffness (E). But for the long column as Euler formula is used, the strength of material (Sy) is not a factor for the critical load.

Let's see how we can make the excel file to help calculate critical load for both short and long columns in the next post.


Sponsored links
Links to this post
Labels:
0 comments
Subscribe to: Posts (Atom)
Mechanical Design Handbook Mechanical-Design-Handbook.blogspot.com
Online reference for mechanical design engineers. Besides the general topics related to mechanical component design, we provide the techniques with calculation sheets made with Microsoft Excel VBA. With help of Microsoft Excel VBA, we can reduce the repetitive calculation processes. We also show you simple techniques to use Microsoft Excel VBA and Solid Edge 3D CAD software to do motion simulation without using simulation module of Solid Edge. The graphing technique to make motion simulation can be found as well. The Mechanical Engineering computation using Microsoft Excel VBA can help reduce repetitive task as well as dynamic simulation using Unigraphics (UG) motion in mechanical engineering design.

Free Download Excel Files excel.best-buy-electronics-stores.com
Mechanical Design Handbook provides some excel files as examples from the articles for free. The users just simply register and download them from the link. You need to have a valid email address for registration. Please note that once you've downloaded the zipped file, you must enter password to extract it. Password is shown below the download link. Join us now!

Why don't you join us?

iOS Application

Popular Posts

  • V-Belt Drive Design
    A belt is a flexible power transmission element that seats tightly on a set of pulleys or sheaves . When the belt is used for speed reduct...
  • Standard roller chain drive design
    A chain is a power transmission element made as a series of pin-connected links. The design provides for flexibility while enabling the cha...
  • Microsoft Excel VBA - Mohr's Circle for Plane Stress
    The German engineer Otto Mohr (1835-1918) developed a useful pictorial or graphical interpretation of the equations for finding the princip...
  • Cam design
    Classes of Cams may, in general, be divided into two classes: uniform motion cams and accelerated motion cams. The uniform motion cam mov...
  • Chain Sprockets
    Chain Sprockets are fabricated from a variety of materials; this would depend upon the application of the drive. Large fabricated steel cha...