This animation of Jerome Choe’s concept for a spherical archway was generated by Mikhail Zhuk. Spherical rhombus elements form a foldable structure. (UCI Robotics and Automation Lab)
Mikhail Zhuk animated this design concept for an eight-bar linkage to deploy a collapsible emergency structure. A physical prototype is under development. (UCI Robotics and Automation Lab)
The basic properties of robots can developed by studying planar serial chains. Select this link for my notes on elementary robotics:
Yi Zhang, Susan Finger and Stephannie Behrens have prepared an on-line introduction to mechanisms consisting of eight chapters and almost 100 figures. Access it at the link:
The slider-crank is an important mechanism with a wide range of applications. Here are my notes on its kinematic analysis.
The four-bar linkage is a basic machine component. It comes in two primary forms the 4R quadridlateral and the slider-crank. Here are my notes for the analysis of the 4R quadrilateral.
A copy of my notes on DC motor torque and power can be downloaded at the link:
The basic principles of DC motors are presented by Joe Wolfe of the University of New South Wales (Sydney, Australia) at the link:
Northwestern University (Chicago, Illinois) presents the basics of a DC motor in the Wiki page:
The MatWeb site provides detailed information about materials such as the tensile strength of various compositions of steel.
For example the search “low carbon steel” results in the list of links to information:
There are a variety of numbering systems for materials such as steel. The unified numbering system (UNS) uses a letter to designate a material category followed by five numbers constructed from the existing materials designations to coordinate all of these numbering systems.
The unified numbering system (UNS) is described in Wikipedia at the link: Unified numbering system
Some of the category letters for steel are:
– G for AISI/SAE carbon and alloy steels;
– S for stainless steels; and
– T for tool steels.
Generally, the standard designation is inserted after the letter defining the material category. For example, AISI/SAE 1018 carbon steel has the UNS designation G10180.