MATSE 259 Exam 1 PSU Questions and Answers | Latest Version | 2024/2025 | Graded A+
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Course
MATSE 259
Institution
MATSE 259
MATSE 259 Exam 1 PSU Questions and
Answers | Latest Version | 2024/2025 |
Graded A+
How does strain relate to deformation in materials?
Strain is the measure of deformation representing the change in length relative to the original
length.
What is yield strength?
Yield strength is th...
MATSE 259 Exam 1 PSU Questions and
Answers | Latest Version | 2024/2025 |
Graded A+
How does strain relate to deformation in materials?
✔✔Strain is the measure of deformation representing the change in length relative to the original
length.
What is yield strength?
✔✔Yield strength is the stress at which a material begins to deform plastically.
Why is Young's modulus important in materials science?
✔✔Young's modulus measures a material’s stiffness, or resistance to elastic deformation under
load.
What is the difference between stress and strain?
✔✔Stress is the internal force per unit area within a material, while strain is the measure of
deformation from that stress.
1
,How is ductility defined in the context of materials science?
✔✔Ductility is the ability of a material to undergo significant plastic deformation before rupture.
What does hardness indicate about a material?
✔✔Hardness indicates a material's resistance to deformation, scratching, or indentation.
What is toughness in materials science?
✔✔Toughness is the ability of a material to absorb energy and deform plastically before
fracturing.
Why are brittle materials generally weaker under tension?
✔✔Brittle materials lack the ability to undergo plastic deformation and are more prone to
cracking under tensile stress.
What is plastic deformation?
✔✔Plastic deformation is the permanent change in shape that occurs when a material is
subjected to a stress beyond its elastic limit.
2
, How does temperature typically affect the strength of metals?
✔✔Higher temperatures generally decrease the strength of metals by making them softer and
more ductile.
What is fatigue in materials?
✔✔Fatigue is the weakening of a material caused by repeated cyclic loading, eventually leading
to fracture.
What is the purpose of conducting a tensile test?
✔✔A tensile test is conducted to determine mechanical properties like yield strength, tensile
strength, and ductility.
What causes creep in materials?
✔✔Creep is caused by long-term exposure to high stress and temperature, leading to slow,
permanent deformation over time.
What is the main characteristic of a brittle fracture?
✔✔Brittle fracture occurs with little or no plastic deformation, often breaking suddenly and
without warning.
3
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