1. The area below the stress-strain curve represents:
The toughness for a brittle material
The energy absorbed by the material at yield
The resilience for a ductile material
The resilience for a brittle material
The energy absorbed by the material at fracture
2. Impact is a measure of the ability of a material to absorb energy during elastic deformation
3. A material is behaving plastically when
Stress persists after the applied strain is removed
Strain returns to zero after the applied stress is removed
Stress returns to zero after the applied strain is removed
Strain persists after the applied stress is removed
4. Ductility of a material measures the amount of strain it reaches at failure.
5. True stress and true strain are used by scientists when a material is developed.
1) option e is correct.
Energy absorbed by the material under fracture. That is toughness but thoughness will not be there for Brittle materials.
Because, impact is a measure of load which is applied from certain height.
And energy absorbed under elastic deformation is resilience.
3)stress returns to zero after applied strain is removed. Because we know that stress is directly proportional to strain.
Ductility is an indication of how much plastic strain a material can withstand before it breaks.
Because true stress and true strain gives the accurate results.
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