Mechanics Flashcards
What is the definition of a load in engineering?
A load is a force acting on a structure that causes it to deform.
What is a beam in structural engineering?
A beam is a structural element that carries loads and resists bending.
What is a moment in statics?
A moment is a measure of the tendency of a force to rotate an object.
What is stress in engineering?
Stress is the force per unit area that a material experiences.
What is statics in engineering?
Statics is the study of forces and their effects on objects at rest.
What is density in physics?
Density is the mass of a substance per unit volume.
What is strain in materials science?
Strain is the amount of deformation experienced by a material in response to stress.
True or False: A point load is a concentrated force applied at a specific point on a structure.
True
Fill in the blank: A cantilever beam is a beam supported at only one __________.
end
What is the formula for calculating bending moment in a beam?
Bending Moment = Force x Distance
What is the unit of stress in the International System of Units (SI)?
Pascal (Pa)
What is the equation for strain in a material?
Strain = Change in length / Original length
In a beam, where is the maximum bending moment usually located?
At the point of maximum deflection
What is the difference between axial stress and shear stress?
Axial stress acts parallel to the cross-sectional area, while shear stress acts perpendicular to it.
What is the Young’s Modulus of a material?
Young’s Modulus is a measure of a material’s stiffness and is the ratio of stress to strain.
What is the principle of superposition in statics?
The principle of superposition states that the total effect of multiple forces acting on a structure can be determined by adding the effects of each force individually.
What is the difference between tensile stress and compressive stress?
Tensile stress is when a material is pulled apart, while compressive stress is when a material is pushed together.
What is the formula for calculating density?
Density = Mass / Volume
True or False: Strain is a dimensionless quantity.
True
What is the formula for calculating stress in a material?
Stress = Force / Area
What is the difference between elastic and plastic deformation?
Elastic deformation is temporary and reversible, while plastic deformation is permanent.
What is the area moment of inertia of a beam?
The area moment of inertia is a measure of a beam’s resistance to bending.
What is the formula for calculating strain in a material subjected to a force?
Strain = (Final length - Initial length) / Initial length
What is the unit of density in the International System of Units (SI)?
Kilogram per cubic meter (kg/m^3)
In a beam, what is the neutral axis?
The neutral axis is a line through the cross-section of a beam that experiences no stress or strain during bending.
