Material Properties Stress and Strain Quiz

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Which property describes the relationship between stress and strain for biological tissues when the stretch is relatively small?

Elastic region

Hooke's law (correct)

Plastic region

Yield Point

In bending of an object, which side becomes convex?

The unstressed 'neutral axis'

The whole bent area

The side in compression

The side in tension (correct)

Which type of bending occurs when a compressive force acts off-center from the long axis of an object?

Long bone bending

Four point bending

Cantilever bending (correct)

Three point bending

Where are the highest tensile and compressive stresses located in a bent object?

On the outer surfaces Signup and view all the answers

What type of forces produce bending in an object?

Normal forces Signup and view all the answers

In four point bending, where does failure typically occur?

At the weakest point between two inside forces Signup and view all the answers

What is the relationship between the radius of a shaft and its resistance to torsion?

Larger radius, greater resistance to torsion Signup and view all the answers

Which of the following is NOT a characteristic of biological materials?

Time-independent behavior Signup and view all the answers

How does the fluid component in biological tissue affect the material's stress-strain behavior?

It affects the material's resistance to flow Signup and view all the answers

What is the relationship between an increase in strain rate and the stiffness of a viscoelastic material?

Increase in strain rate produces an increase in stiffness Signup and view all the answers

What is the term used to describe the energy lost in a viscoelastic material due to internal friction?

Hysteresis Signup and view all the answers

Which of the following properties is a measure of the capacity of a material to sustain permanent deformation?

Toughness Signup and view all the answers

Which of the following best describes the initial cycles effect of material fatigue?

Shift in the mechanical response of the material Signup and view all the answers

What is the key difference between elastic and plastic deformation of a material?

All of the above Signup and view all the answers

What is the term used to describe the stress at which a material's deformation changes from elastic to plastic?

Both a and b Signup and view all the answers

Which of the following best describes the cumulative effect of material fatigue?

Continued loading leads to material failure Signup and view all the answers

Which type of material will continue to deform elastically until it breaks?

Brittle material Signup and view all the answers

What is the definition of a material's 'toughness'?

The amount of energy a material can absorb before it breaks Signup and view all the answers

Which of the following best describes the behavior of a viscoelastic material?

It exhibits both elastic and viscous properties, with slow recovery and less energy return. Signup and view all the answers

How does the stress-strain curve of a viscoelastic material differ from that of an elastic material?

The stress-strain curve of a viscoelastic material shows hysteresis, with the loading and unloading paths being different. Signup and view all the answers

How does the stiffness of a viscoelastic material change with the rate of loading?

The stiffness of a viscoelastic material increases as the rate of loading increases. Signup and view all the answers

Which of the following materials is an example of a viscoelastic material?

Rubber Signup and view all the answers

How does the deformation of a viscoelastic material change over time under a constant load?

The deformation increases over time, a phenomenon known as creep. Signup and view all the answers

Which of the following best describes the relationship between the rate of loading and the stress and strain in a viscoelastic material?

The slower the rate of loading, the lower the stress and strain. Signup and view all the answers

Which of the following statements about stress is correct?

Stress is the internal resistance to an external load, measured in Pascals (Pa). Signup and view all the answers

What is the relationship between stress and strain in a linear material?

Stress and strain are related by Hooke's law, where stress is proportional to strain. Signup and view all the answers

Which of the following statements about strain is correct?

Strain is the proportional change in dimension of an object due to an external force. Signup and view all the answers

Which of the following statements about biological materials is correct?

Biological materials exhibit non-linear stress-strain behavior due to their tissue fluid component (viscoelastic properties). Signup and view all the answers

What is the unit of Young's Modulus, which represents the stiffness or compliance of a material?

Young's Modulus is measured in Pascals per unit strain (Pa/strain). Signup and view all the answers

Which of the following types of stress is associated with sliding one layer of molecules across another?

Shear stress Signup and view all the answers