Materials Selection in Mechanical Design

Materials Selection in Mechanical Design

Michael Ashby presents materials information in a practical format in his book Materials Selection in Mechanical Design.

Materials Selection in Mechanical Design

Materials Selection in Mechanical Design

This is a link to lecture notes that give an idea of his approach:
http://www.uofaweb.ualberta.ca/cme/pdfs/443ashbylectures2006.pdf

Ten-bar Drive

10-bar drive linkage

This 10-bar linkage is designed to drive a scissors movement in order to actuate a deployable structure. It was presented at the 2009 ReMar Conference in London. (UCI Robotics and Automation Lab)

Timing Belt Theory

Timing belt theory

ThomasNet provides a link to a useful white paper on Timing Belt Theory by Gates-Mectrol:

http://www.thomasnet.com/white-papers/abstract/101106/timing-belt-theory.html

Geometric data on timing belt drives can found in the catalog linked to Gates-Mectrol home page:

http://www.gatesmectrol.com/

gates-mectrol-logo1

Gearing

Gear geometry

Gear geometry data is available from PIC Design Inc. which is now part of RBC Bearings at the link:

http://pic-designcatalog.com/Images/pdfcat/section_12.pdf

RBC Bearings Logo

RBC Bearings Logo

Stock Drive Products provides an on-line Handbook of Gears at the website:

http://www.sdp-si.com/products/Gears/Index.php

Stock Drive Products Logo

Stock Drive Products Logo

The Gleason Gear has a lot of useful information:

http://www.gleason.com

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The American Gear Manufacturers Association provides standards for sale on-line at the site:

https://www.agma.org/standards/.

AGMA Logo

AGMA Logo

Colorado Videos

Mechanisms videos at Colorado State

Prof. David Alciatore has a large number of videos illustrating machines, physics principles and billiards, including high speed videos.  Video demonstrations of mechanisms can be found at the following site as well as links to much more:

http://video_demos.colostate.edu/mechanisms/index.html

Spherical Deployment

Spherical deployable linkage assembly

This assembly of spherical rhombus linkages expands to enclose a volume.  It was designed by Jerome Choe to explore the construction of complex articulated systems. (UCI Robotics and Automation Lab)

Chris Sangwin

C. J. Sangwin’s linkage movies

Chris Sangwin has a nice collection of linkage movies at How round is your circle?.

Particularly nice are the straight line mechanisms such as Hart’s second straight-line mechanism.

His example of the Sarrus linkage is also found on YouTube:

Brock Institute Logo

Brock Engineering’s mechanism home page

Fred Klingener has generated a number of interesting mechanism animations.  My favorite is the Peaucellier straight line mechanism.  You will find a table of 16 or so animations at his site:

http://www.brockeng.com/mechanism/index.htm

Brock Institute Logo

Brock Institute Logo

Bennett Linkage

Linkage animations on synthetica

This link connects to a web-page with a number of linkage animations. There are several planar four-bar linkages, several spherical four-bar linkages, and an example of a spatial four-bar linkage called a Bennett linkage that is shown below. This page also includes a number of spherical linkage animations generated by students some years ago. (UCI Robotics and Automation Lab)

http://synthetica.eng.uci.edu/Linkages.html

This animation was generated by HaiJun Su using POV-Ray. It is a Bennett linkage designed to guide the coupler linkage through three specified task positions:

KMODDL Tour

Kinematic models for design

The KMODDL team at Cornell University maintains an excellent digital library of kinematic models with animations.  Access their site at the link:

http://kmoddl.library.cornell.edu/

KMODDL Logo

KMODDL Logo