32 Questions
What do mechanical properties of materials describe?
The behavior of materials under different types of loads
Which type of loading involves a force applied rapidly causing an impact?
Dynamic Loading
What is stress in the context of mechanical properties of materials?
The intensity of internal forces
What is strain in the context of mechanical properties of materials?
A dimensionless value representing the change in length relative to the original length
Which type of loading involves a force applied repeatedly, causing variation in the magnitude and sometimes the direction of internal forces?
Repeated Loading
What are the units for stress typically expressed in?
$N/mm^2$ (MPa)
What is the definition of normal stress?
Stress normal to the section, could be tension or compression stress
How is strength of a material measured?
By the maximum stress
What is the point in the stress-strain curve where plastic deformation begins?
Yield or proof stress
What is elasticity defined as?
Ability of a material to return to its original shape and dimensions after removing the applied load
What is stiffness a measure of?
Resistance to deformations
What is Poisson's ratio?
The ratio between lateral strain and axial strain
What does ductility measure?
% Reduction in area in Tension test of steel
What characterizes brittle materials?
Failure almost without deformations
What does hardness measure?
Resistance to any indentation or scratch caused by any type of load
What is shear stress?
Stress parallel to the section.
What type of loading involves a force applied slowly to an assembly or object?
Static Loading
What is the unit of stress typically expressed in?
$N/mm^2 (MPa)$
What is the measure of the intensity of internal forces?
Stress
What is the ratio between the change of length to the original length called?
Strain
Which type of loading involves a force applied repeatedly, causing variation in the magnitude and sometimes in the sense of the internal forces?
Repeated Loading
What is the dimensionless value that is the ratio between the change of length to the original length?
Strain
What is the definition of ductility?
The maximum percentage of deformation a material can undergo
What does Poisson's ratio measure?
The ratio between lateral strain and axial strain
Which type of loading involves a force applied rapidly causing an impact?
Dynamic loading
What is the measure of the intensity of internal forces?
Stress
What does hardness measure?
The material's surface resistance to indentation or scratch
What is the dimensionless value that is the ratio between the change of length to the original length?
Poisson's ratio
What characterizes brittle materials?
Failure without deformations
8
What type of loading involves a force applied repeatedly, causing variation in the magnitude and sometimes in the sense of the internal forces?
What is elasticity defined as?
Ability of a material to return to its original shape and dimensions after removing the applied load
What is strain in the context of mechanical properties of materials?
The ratio between lateral strain and axial strain
Test your understanding of the properties of engineering materials, with a focus on mechanical properties subjected to various types of loads such as static, dynamic, or repeated loads. This quiz covers topics taught by Dr. Engy Hany, Assistant Professor at the Faculty of Engineering, Ain Shams University.
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