In this talk we will
review the geometry, preparation and measurement of the circular
test samples used for the aluminum, cast iron and PMMA materials.
Then we review the steps taken in the test and in data acquisition.
In the lab reports section we will ask you to determine shear modulus,
and either yield stress in shear (for ductile materials) or fracture
stress (for brittle materials). Thus in this talk we also review
the data reduction procedures and basic equations. Note that the
analyses discussed here apply only to circular cross sections. Data
and analysis sheets are provided in the lab manual to help you with
your data reduction.