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WorksheetsStress-strain
Total questions: 25
Worksheet time: 17mins
Which of the following best describes the ability of a material to be stretched and return to its original shape?
elasticity
hardness
conductor
brittleness
In the given stress-strain curve, which of the following is represented by the slope of B?
Fracture point
Ultimate tensile strength
Yield Strength
Modulus of Elasticity / Hooke's law Proportionality Constant
"Normal force" for materials under load is a force that is parallel to the cross-sectional area.
True
False
If points D and E are close to each other in the stress-strain curve the material is ductile.
True
False
In the given stress-strain curve, which of the following is represented by point D?
Fracture point
Ultimate tensile strength
Yield Strength
Modulus of Elasticity / Hooke's law Proportionality Constant
In the given stress-strain curve, which of the following is represented by point A?
Fracture point
Ultimate tensile strength
Yield Strength
Modulus of Elasticity / Hooke's law Proportionality Constant
How is stress calculated?
Number of sleepless nights divided by number of cups of coffee
Divide load (F) by the original test sample cross-sectional area (A0).
Elongation (δ) under load divided by the original Length (L0)
Stress (σ) divided by strain (ε)
How is strain calculated?
Number of sleepless nights divided by number of cups of coffee
Divide load (F) by the original test sample cross-sectional area (A0).
Elongation (δ) under load divided by the original Length (L0)
Stress (σ) divided by strain (ε)
If a material has a cross-sectional area of 5 square meters and subjected to a normal force of 20 N, which of the following is the normal stress?
4 Pa
25 Pa
0.4 Pa
15 Pa
Using the stress-strain curve above, what is the ultimate tensile strength for steel?
≈ 350 MPa
≈ 250 MPa
≈ 230 MPa
≈ 200 MPa
Using the stress-strain curve above, what is the yield strength for aluminum?
≈ 130 MPa
≈ 250 MPa
≈ 230 MPa
≈ 200 MPa
"Shear force" for materials under load is a force that is parallel to the cross-sectional area.
True
False
When the cross-sectional area of a material is increased, the stress is decreased.
True
False
When the amount of force applied to a material is increased, the stress is decreased.
True
False
When a material is subjected to a stress beyond its elastic limit, that material will exhibit plastic deformation.
True
False
If F is force, k is spring constant and x is extension, Hooke's Law tells us that:
F=k/x
k=Fx
x=Fk
F=kx
Hooke's Law fails when a material reaches its:
breakdown
end of tether
elastic limit
fracture stress
A spring has a spring constant of 5N/cm. What is its extension when loaded with 15N?
4cm
3m
4m
3cm
Which of the following directions is the restoring force acting?
To the right
To the left
Boft left and right
There is no restoring force
A steel string which stretches a little under tension and returns back to its original form quickly after removal of applied force is more elastic compared to a rubber string undergoing the same conditions.
True
False
The greater the stress applied to a material, the lesser will be the strain.
True
False
Which of the following type of stress is applied to a material which experienced plastic deformation in terms on reduction in volume?
Compressive stress
Tensile Stress
Shear Stress
Torsional Stress
Which of the following type of stress is applied to a material which experienced plastic deformation that resulted to increase in length and necking?
Compressive stress
Tensile Stress
Shear Stress
Torsional Stress
Using the stress-strain curves provided, which of the two materials experiences more plastic deformation?
Material #1
Material #2
In the given stress-strain curve, which of the following is represented by point E?
Fracture point
Ultimate tensile strength
Yield Strength
Modulus of Elasticity / Hooke's law Proportionality Constant
