BioChemi Flashcards
(52 cards)
What is elastic strength?
The ability of a material to return to its original shape after the removal of a load.
What is plastic strength?
The ability of a material to undergo permanent deformation without breaking.
True or False: Elastic strength is associated with reversible deformation.
True
True or False: Plastic strength occurs before the yield point of a material.
False
What is the yield point?
The stress at which a material begins to deform plastically.
Fill in the blank: The region of a stress-strain curve where the material returns to its original shape is known as the __________ region.
elastic
What does the term ‘modulus of elasticity’ refer to?
A measure of a material’s stiffness or resistance to elastic deformation.
Which type of strength is typically measured using a tensile test?
Both elastic and plastic strength.
What is the main difference between elastic and plastic deformation?
Elastic deformation is reversible, while plastic deformation is permanent.
Multiple choice: Which of the following materials is most likely to exhibit high elastic strength? A) Rubber B) Steel C) Clay
B) Steel
What happens to a material that exceeds its elastic limit?
It will experience plastic deformation.
True or False: All materials exhibit both elastic and plastic strength.
False
What is the term for the ratio of stress to strain in the elastic region?
Young’s modulus.
Fill in the blank: Materials that do not return to their original shape after deformation are said to have __________ strength.
plastic
What is a common application of materials with high elastic strength?
Springs and shock absorbers.
Multiple choice: Which of the following is a characteristic of plastic strength? A) It allows for recovery after stress B) It leads to permanent change C) It occurs at low temperatures
B) It leads to permanent change
What is the significance of the area under the stress-strain curve?
It represents the toughness of the material.
True or False: The plastic region of a stress-strain curve is linear.
False
What type of test is often used to determine the plastic strength of a material?
Tensile test.
Fill in the blank: The transition from elastic to plastic behavior occurs at the __________ point.
yield
Which material is likely to have low plastic strength?
Glass.
True or False: Ductile materials exhibit both elastic and plastic behavior.
True
What is the primary factor that influences the elastic strength of a material?
The material’s composition and structure.
Multiple choice: Which property is more relevant for structural applications: A) Elastic strength B) Plastic strength C) Both
C) Both
