16 Questions
What are the properties that describe the behavior of materials subjected to different types of loads?
Mechanical properties
Which type of loading involves a force applied slowly to an assembly or object?
Static loading
What is the unit for stress as per the provided information?
N/mm2 (MPa)
What is the intensity of internal forces defined as?
Force/Area
What is strain defined as?
Change of length to the original length
Which type of loading causes variation in the magnitude and sometimes in the sense of the internal forces?
Repeated loading
What is the maximum stress that a material can resist?
Tensile stress
What property of a material is measured by stress (load per unit area)?
Strength
What does Poisson's ratio represent?
The ratio of lateral strain to axial strain.
What is the ability of a material to return back to its original shape and dimensions after removing the applied load called?
Elasticity
What does ductility measure?
% Elongation & % Reduction in area in Tension test of steel.
What does brittleness refer to?
Failure of materials almost without deformations.
Which property measures the resistance to any indentation or scratch caused by any type of load?
Hardness
What does stiffness measure?
The resistance to deformations.
What does the yield or proof stress represent?
The point at which the curve levels off and plastic deformation begins.
Which stress is parallel to the section?
Shear Stress
Study Notes
Material Properties under Load
- Properties that describe the behavior of materials subjected to different types of loads include stress, strain, ductility, brittleness, stiffness, and Poisson's ratio.
Types of Loading
- Static loading involves a force applied slowly to an assembly or object.
- Cyclic loading causes variation in the magnitude and sometimes in the sense of the internal forces.
Stress and Strain
- Unit of stress is typically measured in pascals (Pa) or pounds per square inch (psi).
- Stress is the intensity of internal forces defined as the force per unit area.
- Strain is defined as the deformation of a material per unit length.
Material Strength
- The maximum stress that a material can resist is known as its strength.
- Stress measures the internal resistance of a material to external forces.
Material Properties
- Poisson's ratio represents the lateral strain response to a longitudinal tensile load.
- Ductility measures the ability of a material to be deformed without breaking.
- Brittleness refers to the tendency of a material to break or shatter without deformation.
- Hardness measures the resistance to any indentation or scratch caused by any type of load.
- Stiffness measures the resistance of a material to deformation under load.
Yield and Proof Stress
- Yield or proof stress represents the maximum stress that a material can withstand without undergoing permanent deformation.
- Shear stress is parallel to the section and occurs when the force is applied parallel to the surface.
Test your knowledge of the mechanical properties of engineering materials, including their behavior under static, dynamic, and repeated loads. This quiz covers topics such as types of loading and basic material properties.
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