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Questions and Answers
What is the fracture toughness?
What is the fracture toughness?
- A measure of a material's strength
- A measure of a material's ductility
- A measure of a material's ability to withstand high temperatures
- A measure of a material's resistance to brittle fracture when a crack is present (correct)
What are the units of fracture toughness?
What are the units of fracture toughness?
- m or in
- MPa or psi
- MPa√m or psi√in (correct)
- N or lb
What is the Y parameter in the fracture toughness expression?
What is the Y parameter in the fracture toughness expression?
- A dimensionless parameter or function that depends on both crack and specimen sizes and geometries as well as on the manner of load application (correct)
- A measure of a material's ability to withstand high temperatures
- A measure of a material's ductility
- A measure of a material's strength
What is the condition of plane strain?
What is the condition of plane strain?
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What is the most influential factor on the plane strain fracture toughness?
What is the most influential factor on the plane strain fracture toughness?
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Study Notes
Fracture Toughness
- Fracture toughness is the ability of a material to resist fracture when a crack is present
- It is a measure of a material's resistance to crack propagation
Units of Fracture Toughness
- The units of fracture toughness are typically measured in MPa√m (megapascals square root meters) or psi√in (pounds per square inch square root inches)
Y Parameter in Fracture Toughness Expression
- The Y parameter is a dimensionless constant that depends on the specimen geometry and the crack configuration
- It is used to relate the stress intensity factor to the applied load and crack length
Condition of Plane Strain
- Plane strain is a condition where the material is constrained to deform in a two-dimensional plane
- This occurs when the material is thick enough to prevent deformation in the direction perpendicular to the plane of the crack
Influential Factor on Plane Strain Fracture Toughness
- The most influential factor on plane strain fracture toughness is the thickness of the material
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