Impact Testing (Leaving Cert Engineering): Flashcards
📚Flashcards
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12 cards from this deck
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Practise the cards
12 cards from this deck
What type of testing method is impact testing?
What type of testing method is impact testing?
Destructive testing method
What does impact testing measure?
What does impact testing measure?
Toughness of a material
What is toughness?
What is toughness?
Ability to absorb energy before breaking
Main equipment used in impact testing
Main equipment used in impact testing
Pendulum system with heavy striker
Specimen orientation in Izod test
Specimen orientation in Izod test
Vertical (clamped like a cantilever)
Specimen orientation in Charpy test
Specimen orientation in Charpy test
Horizontal (supported between two anvils)
Key measurement in impact testing
Key measurement in impact testing
Energy absorbed to break the specimen
How do tough materials behave in impact test?
How do tough materials behave in impact test?
Absorb lots of energy, pendulum doesn't swing far
How do brittle materials behave in impact test?
How do brittle materials behave in impact test?
Break easily, pendulum retains most energy
Appearance of brittle fracture
Appearance of brittle fracture
Snaps suddenly with clean break
Appearance of ductile fracture
Appearance of ductile fracture
Bends and tears, shows plastic deformation
Purpose of notch in test specimen
Purpose of notch in test specimen
Ensures predictable breaking location and consistent test conditions