2. • It is a motorized, mechanical unit. The speed
is adjusted so that the load increase on the
specimen is between 4 to 6 kg/sec. A flexure
test attachment for keeping the object in
position is also supplied. This consists of two
rollers 10mm. diameter and spaced 100mm
apart, and a third roller of the same diameter
equidistant from the first two and for
transmitting the applied load to the opposite
face of the prism.
3. CONSTRUCTION:
• This instrument is hand version model comprising
of a four pillar loading unit with a jack at the base.
• The top of the jack carries the table for the beam
and has two rollers whose center distance can be
adjusted to suit cross sectional area of sample
beam.
• Top plate has an adjustable seating and a member
with two rollers.
5. PROCEDURE:
• Turn the object on its side with respect to its position
when molded, and center it on the supporting bearing
blocks.
• The load-applying block shall be brought in contact with
the upper surface at the center line between the
supports.
• Bring load applying block in full contact with the beam
surface.
• If load is applied with a hand pump, load the beam by
applying the load at a rate of one full pump stroke per
second.
• Rate of load application for screw power machines, with
the moving head operating at 0.05 in.(1.3mm) per
minute when the machine is running idle, is acceptable.
6. APPLICATION:
• The flexure test method measures behavior of
materials subjected to simple beam loading. It
is also called a transverse beam test with
some materials. Maximum fiber strain and
maximum strain are calculated for increments
of load.
• Used in building construction, railway etc.
