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WorksheetsUnderstanding Material Properties and Stress-Strain Behavior
Total questions: 20
Worksheet time: 12mins
What graphical representation is used to display material properties under stress?
Force time graphs
Stress-strain curves
Load force curves
Line graphs
What does the shape and features of the stress-strain curve indicate?
The material's weight
The material's temperature
The material's properties
The material's change in shape
Which property of a material is used to measure its stiffness in the elastic portion of the stress-strain curve?
Young's modulus.
Shear modulus.
Bulk modulus.
Poisson's ratio.
What is the elastic limit of a material?
The point where a material fractures under stress.
The point where a material stops returning fully to its original shape after the load is removed.
The maximum stress a material can withstand without breaking.
The point where a material begins to harden.
What happens right after the elastic limit is passed in a material?
The material fractures.
Tiny permanent changes begin in the material.
The material returns to its original shape.
The material begins to harden.
Young's Modulus is stress divided by strain. Where can this be found on a stress-strain graph?
In the proportional part of the curve
In the area underneath the curve
At the end of the curve
After the yield point
What is the term used to describe the point at which a material enters the plastic deformation region?
Fracture point
Yield strength
Elastic limit
Necking point
What happens to a material in the plastic deformation region after the stress is removed?
The material returns to its original shape
The material gets permanently deformed
The material fractures immediately
The material undergoes elastic deformation
How does the stress-strain curve behave in the plastic deformation region?
It remains linear
It becomes non-linear
It forms a straight line
It shows no change
What factor determines the exact shape of the stress-strain curve in the plastic deformation region?
The amount of stress applied
The material type
The temperature of the material
The strain rate
What is the yield point or yield strength in a stress-strain curve?
The maximum stress the material can sustain
The start of plastic deformation
The point where the material breaks
The slope of the stress-strain curve
Which region of the stress-strain curve represents elastic behavior?
The area under the curve
The initial straight-line portion
The final descending part
The curved portion after the yield point
What does a steep slope in the elastic region of a stress-strain curve indicate about a material?
The material has low strength
The material is about to fracture
The material has a high stiffness
The material is very ductile
What property is measured by the area under the stress-strain curve up to the fracture point?
Elastic limit
Yield strength
Young's modulus
Toughness
What is the ultimate tensile strength of the material shown in the graph?
65 MPa
170 MPa
220 MPa
50 MPa
Using the stress-strain graph, what is the failure stress of steel?
250 MPa
120 MPa
350 MPa
225 MPa
Using the stress-strain curve, what is the yield stress for aluminium?
225 MPa
250 MPa
350 MPa
125 MPa
What does a large area under the stress-strain curve suggest about a material?
The material is very tough
The material is very brittle
The material has a low elastic limit
The material has low ductility
What is the ultimate tensile strength of Al 7075-T6?
570 MPa
750 MPa
190 MPa
110 MPa
Which material has the smallest plastic deformation before failure?
Al 1100
Al 2024-T351
Al 6061-T651
Al 7075-T6
