Demo Outline (For reference)?

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Demo Outline (For reference)?
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An impact test is a dynamic test conducted on a
selected specimen which is usually notched. The
specimen is struck and broken by a single blow in
a specially designed machine. This demo
illustrates the experiment setup, procedure and
the energy absorbed in an impact test.
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Impact Test
Aim To measure the toughness, or energy
absorption capacity of the materials.
Notch
Test-specimen
Pendulum Machine
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Test Specimen Support Conditions
Charpy Test Setup
Notch
Point of Impact
Specimen
44m
Simple beam support
Specimen
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Test Specimen Support Conditions
Izod Test Setup
Notch
Cantilever beam support
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Equations
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Charpy Experiment Simulation

1. Load the Specimen.
2. Release the Pendulum.

Hammer
Specimen
Simple beam support
Drag the specimen to the support and click hammer.
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Charpy Experiment Simulation

1. Load the Specimen.
2. Release the Pendulum.

Indicate P.E 300J Energy Absorbed 120J
0
150
Click the Quiz button.
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Resources

• Reference Links
• http//en.wikipedia.org/wiki/Charpy_impact_test
• http//en.wikipedia.org/wiki/Izod_impact_strength_
  test
• http//www.matweb.com/reference/izod-impact.aspx
• http//www.steeluniversity.org/content/html/eng/de
  fault.asp?catid151pageid2081271949

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Results of the Charpy Impact test and the Izod
impact test
cannot be compared
can be compared if the specimens have the same
dimensions
should be used in tandem to estimate the
toughness of the material
can be compared if the pendulum / hammer has the
same weight
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Results of an impact test
can be used directly in design equations for
components
can be used in design equations for components
only after empirical correlation has been
obtained
can be used in design equations after adjusting
for temperature difference only
cannot be used for design calculations
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Impact tests
are independent of specimen size
are independent of notch size
are dependent on specimen size
are dependent on notch size
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The temperature of the specimen
does not affect the results of the test
is directly proportional to the measured toughness
is inversely proportional to the measured
toughness
affects the measured toughness differently for
different materials
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Results of the impact test
can be used directly to estimate yield strength
cannot be used directly to estimate yield
strength
can be used to estimate yield strength based on
empirical correlations
can be used to estimate yield strength based on
fundamental relationships