Engineering Science Amacing

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46 Terms

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Non-hookean Material

exhibit nonlinear behavior under stress and deformation. These materials may behave differently under various loading conditions.

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Hookean Material

materials that exhibit linear elasticity, meaning that they deform proportionally to the applied stress.

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Law of Inertia

Newton’s First Law

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Law of Acceleration

Newton’s 2nd Law

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Law of Opposite Reaction

Newton’s 3rd Law

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Center of Gravity

The point through which the whole weight of the body acts is called

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force/area

shear equals?

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Hooke’s Law

States that strain produced within elastic limits is proportional to the stress producing it.

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Normal Stress

The stress which acts in a direction perpendicular to the area

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Shear and Bending Moment Diagram

A diagram which shows the variations of the axial load for all sections in the span of a beam

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Equilibrium

A condition in which the resultants of all forces acting on the body is zero.

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Statics of Rigid Bodies

is the study of materials, objects, or particles at rest or moving under constant velocity

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Rigid Body

A combination of large number of particles in which all particles remain at a fixed distance from one another before and applying a load

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Ex, Ey, EMo

Order of solving for equilibrium

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Varignon’s Theorem

states that the moment of a force about any point is equal to the algebraic sum of the moments of the component forces about the same point.

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Tensile

When equal and opposite forces applied to a body tend to elongate it, the stress produced is

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Yielding Point

Stress at which extension of a material takes place more quickly as compared to the increase in load

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kNm

SI unit for bending moment.

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Weight

Refers to the gravitational force (attraction) of the earth acting on a body.

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Bending stress is the same at every section along its longitudinal axis

A beam is said to be uniform strength, if

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Neutral Axis

In a beam, which layer is neither elongated nor shortened during bending

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Free Body Diagram

A _____ isolates a body from its surroundings, and one considers all the forces and only those forces, acting on the body.

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2 normal 1 shear

In a body loaded under plane stress conditions, how many independent stress components are present

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kN

SI unit for shear force

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Rigid

A ______ body is one which does not deform. The distance between the individual particles making up the body remains unchanged under the action of external forces.

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tension and compression

types of normal stresses

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compressive

a normal stress that reduces volume

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a2+b2=c2

Pythagorean theorem

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Vector

a quantity that has both magnitude and direction

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PL/AE

an engineering formula derived from Hooke's Law, relating applied force and deformation

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Force

what is “P” in PL/AE

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Original Length

what is “L” in PL/AE

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Cross-sectional area

what is “A” in PL/AE

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Modulus of Elasticity

what is “E” in PL/AE

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Young’s Modulus

the ratio of the stress (force per unit area) applied to the object and the resulting axial strain (displacement or deformation) in the linear elastic region of the material

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F sin(angle)

how to find the magnitude of y in vectors

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F cos(angle)

how to find the magnitude of x in vectors

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divide force to corresponding side and multiply to missing side

how to solve for sides in a 3 4 5 angle

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pythagorean and soh cah toa

used in resultant vectors

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“dissect” forces to its x and y component

how to solve in method of joints

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shear, compressive, tensile, and torsional

types of stresses

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psi

imperial unit for force/pressure

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kips

occasionally called a kilopound (1000lbs)

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Pascal

is defined as a force of 1 Newton across 1 sq metre.

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Megapascal (MPa)

1 Newton per Square Millimeter

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stress/strain

how do you compute for the modulus of elasticity