The document provides an overview of the Universal Testing Machine (UTM), describing its components, capabilities, and the types of tests it can perform including tensile, compressive, shear, and flexure tests. It highlights the principles and procedures involved in each testing method, as well as limitations that must be considered for accurate results. Finally, it includes a request for feedback on the presentation's content.

1. Ahsan Manzar
DAE (Mechanical)
BE Mechatronics (In Progress
ahsanmanzar98@gmail.com
Linkedin Profile:
https://www.linkedin.com/in/ahsan
-manzar-272b59133/

2. PRESENTATION OVERVIEW 2
UTM
Tensile
test
Compressive
test
Shear test
Flexure test

3. Universal Testing Machine (UTM)
Utm is a machine used to
perform a variety of test i.e.
tensile, compressive and
bending etc. it can be operated
with screw gear or hydraulic
power.
It mainly consist of two essential
part;
• Loading unit
• Measuring /control unit
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Loading unit
Control/measuring
unit

4. Parts of Universal Testing Machine
Load indicator
Clamps to hold
the specimen
Unload Lever
Load Lever
Machine dial
Load indicator
Clamps to hold
the specimen
Unload Lever
Load Lever
Load indicator
Clamps to hold
the specimen
Unload Lever
Load Lever
Machine dial
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5. Limitations of (UTM)
• Should be sensible to small load changes.
• The jaws should be are in alignment.
• Moveable head shouldn't rock, twist, or shift laterally.
• The load application should be uniform.
• It should be free from excessive vibration.
• Recoil mechanism should be adequate to absorb the energy.
• Should be capable of easy and rapid manipulation and
adjustment.
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6. UTM (TESTING)
The following tests can be performed on UTM:
• Tensile test
• Compressive test
• Shear test
• Flexure/bend test
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7. Tensile test
• It is a common test performed on metals, plastics, and
most other materials.
• Tensile loads are those that tend to pull the specimen
apart, putting the specimen in tension.
• Tensile tests are used to determine the mechanical
behavior of materials under static, axial tensile, or stretch
loading.
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Gauge
markings
Gauge
markings

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9. Tensile Test (Graphing)
Strain
stress
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10. Compression Testing
• Principles;
• Compression results from forces that push toward
each other.
• Specimens are short and large diameter.
• Circular cross section is recommended.
• Length to diameter ratio is important consideration
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11. Testing Procedure
• During a typical compression test, data are collected regarding
the applied load, resultant deformation or deflection, and
condition of the specimen.
• For brittle materials, the compressive strength is relatively easy
to obtain, showing marked failure.
• However, for ductile materials, the compressive strength is
generally based on an arbitrary deformation value.
• Ductile materials do not exhibit the sudden fractures that brittle
materials posses. They tend to buckle and "barrel out".
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12. Shear Testing
• Principles;
o Shearing forces occur when the forces applied lie
in parallel but opposite directions. Twisting
motion.
• Direct shear occurs when parallel forces are
applied in the opposite direction.
• Single shear occurs on a single plane.
• Double shear occurs on two planes.
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13. Testing procedure
o Special fixtures are needed to hold the specimen.
o One end of the specimen is placed in a fixture that applies
torsional load and the other end is connected to a
measuring unit, which measures the detrusion (load and
deflection or twist)
o The grippers are tightened to insure against slippage, yet
not so tight as to cause deformations which would affect
test results.
o Proper precautions should be taken to center the specimen
in the machine or fixture.
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14. Flexure/Bend test
• Principles;
• Specimen length should be 6 to 12 times the width to avoid shear
failure.
• Areas of contact with the material under test should be such that
unduly high stress concentrations are avoided.
• Longitudinal adjustments are necessary for the supports.
• Lateral rotational adjustments should be provided to prevent
torsional stresses.
• The parts should be arranged to be stable under load.
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16. Testing Procedure
• In flexure or bend testing, the specimen is typically loaded on two
solid support rods.
• A third rod is used for loading.
• This setup helps insure three-point loading. which allows the
tensile forces to act from the center loading point towards the two
support rods.
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17. • This is my first slide on slideshare.
Kindly give feedback or review
about content
THANKS!
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