Model No.ME-8236
Operation
9
012-13762C
Materials Shear Accessory (ME-8239)
The Materials Shear Accessory consists of two pieces of
hardened steel - a front piece and a back piece - held together
by a pair of permanent screws, and a package of Materials
Shear Samples. The front piece can slide vertically relative
to the back piece, which is designed to be mounted on the
load cell using an included hex key (allen wrench). The two
pieces have pairs of matching holes with four different diam-
eters to fit a variety of samples for testing. The hole diame-
ters are approximately 1/16”, 3/32”, 1/8”, and 5/32”. The
Materials Shear Samples includes three 1/8” diameter rods
each of three metals: aluminum, brass, and mild steel.
NOTE
:
Do not use a sample with a hardness greater
than mild steel.
Use the two mounting screws and the included hex key
(allen wrench) to attach the back piece of the Materials Shear
Accessory to the top of the load cell. Note that when the
front piece is raised by hand as far as it will go, the holes in
the front piece align with the matching holes in the back
piece.
Insert the test sample through the pair of holes that best
match the diameter of the sample. Use a sample that is long
enough so that it extends about 1/4” (6 mm) beyond the front
and back pieces. Doing this makes it easier to remove the
sample remnants from the accessory after the test.
Adjust the position of the load bar so that it rests on the top
surface of the front piece.
Attach the Safety Shields
Attach the Velcro® hook material on the two safety shields
to the Velcro® loop material on the front and back of the
Load Bar. Adjust the position of the shields so that they will
block any fragments that may come from the sample.
Turn the crank counterclockwise to apply a downward force
on the front piece of the accessory to shear the sample.
Materials Photoelasticity Accessory
(ME-8241)
Samples of clear plastic that are viewed through crossed
polarizers reveal patterns of different colors that show stress
distribution. The Materials Photoelasticity Accessory is
designed to work with the Materials Testing System to
demonstrate the photoelastic phenomenon in clear plastic
samples.
The Materials Photoelasticity Accessory consists of two
rectangles of polarizer material that can be attached to the
Velcro® loop material on the front and back of the Load Bar
of the Materials Testing System.
Front
Piece
Back
Piece
0.067”,
1.7 mm
0.099”,
2.5 mm
0.161”,
4.0 mm
0.130”,
3.3mm
Mounting
Screws
Materials Shear
Accessory
Figure: Materials Shear Accessory