Slide 6

The moment of inertia about an axis perpendicular to the plane of an area is called the Polar Moment of Inertia. If dA is the area of a small element at a distance rho from the center of the cross section, then the Polar Moment of Inertia, J, is defined as the integral over the cross section of the product of distance squared and the small area dA .For a solid circular shaft, the polar moment of inertia is given by J=pi r raised to power four over 2. Similarly we can write the expression for a hollow shaft.

Introduction

Chalk Talks
•Basic theory
•Testing
  system
•Engineered   materials
•Turkey bone

Virtual Tests
•Aluminum
•Turkey bone
•PMMA
•Cast iron

Test Data
•Aluminum
•Turkey bone
•PMMA
•Cast iron

Lab Manual
•Engineered   materials
-Instructions
-Data sheets
•Turkey bone
-Instructions
-Data sheets
•Entire lab
  manual (.doc) (.pdf)

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