Slide 5

Substituting the stress from previous expressions, we find that torque is the integral of G phi over L times rho squared dA. Pulling out the terms that do not vary over the cross section we get that the torque is G phi over L, times the polar moment of inertia, which is the integral of rho squared over the cross section. We will discuss polar moment of inertia, J, on the next slide. Rearranging the terms, we can write the angle of twist phi as T L over G J. We can also find the stress from tau=G rho phi over L, and then substituting for phi to get tau=T rho over J.

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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