Slide 10

Brittle materials will fracture with little or no yielding. In such materials we cannot talk about yield stress, but instead can discuss the ultimate strength of the material. Plot the torque-twist curve and then determine the torque at which the sample fails. Then the shear strength of the material can be determined from tau ultimate equals max torque times outer radius of gauge section 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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