ES (AMACE)

Hooke's Law

Stress is proportional to strain.

Strength of materials

Deals with the relation between externally applied loads and internal.

Continuous Beam

A type of beam with at least three or more supports.

Simple Beam

A beam that is simply supported at both ends.

First degree

Zero Degree

What kind of curve is a uniformly distributed load if you plot it in a shear diagram?

Beam Deflection

Second moment of area is an important value which is used to _____

5N

Two forces 3N and 4N are perpendicular to each other the resultant of the two forces is___

Vector Quantities

Quantities having both magnitude and direction.

Moment

Measure of tendency of a force to make a rigid body to rotate.

Concurrent

Force system whose line of action pass through common point.

Zero Stress

Centroid is also called the axis of zero stress.

Shear

Moment of inertia is used for the stress calculations of____

Free Body Diagram (FBD)

Sketch of a body completely isolated.

Proportional Limit

The safe load the material can carry.

Triangular load

The intensity of loading increases or decreases at a constant rate.

Rigid Body

It is defined as a definite amount of matter the parts which are fixed in position relative to each other.

Fixed Beam

It is a type of beam which is restrained at both ends.

Determinate Beam

Cantilevered beam is considered as ______

Principle of Transmissibility

The external effect of a force in a rigid body is the same for all point along its line of action.

Torsional Stress

When a machine shaft is subjected to torque, the stress _______

Area Moment of Inertia

Can be calculated if we have a rectangular coordinate system, one can define the area moment of inertia around the axis.

Equilibrium

The state or condition in a body wherein the resultant is zero.

Modulus of Elasticity

The slope of the stress and strain.

Reaction Force

Force that inhibits change in the state of movement of a body.

Varignon's Theorem

This theorem states that the moment of a resultant of two concurrent forces about any point is equal to the algebraic sum of the moments of its components about the same point.

Strain

Deformation

KN-m

What is the unit of Torque

length

Strain is deformation divided by

Zero Force member

Some members in the truss which cannot carry load.

Stable Centroid

is used to determine if the building is stable.

Method of Joints

This method uses the free body diagram of joints in the structure to determine the forces in each member.

Rigidity

Deformation is a measure of the material's ________

Newton

Unit of force.

Break

Strength of materials refers to the tendency of the structure not to ______

Cantilever Beam

A type of beam with at least three or more supports.

Pascal

What is the unit of stress?

Equilibrium Equation for a Particle

A particle is in equilibrium if the resultant of all forces acting is equal to zero.

Magnitude

It is the intensity of the force.

System of Forces

When several forces act in a given situation.

Truss

It is a structure made of two force members all pin is connected to each other.

Overhanging Beam

A type of beam with either or both ends extending beyond the support.

Second Moment of Area

An important value which is used to calculate the resistance to buckling.

Parallelogram Law

The resultant of two forces which is the diagonal formed on the vectors of this force.

Concurrent, Coplanar

The action lines of all the forces are in the same plane and intersect a common point.

Center of Gravity

A point within an object from which the force of gravity appears to act.

lie somewhere along the line of symmetry.

If an area has one line of symmetry the centroid will

Bearing Stress

Contact pressure between separate bodies.

Concentrated Load

A kind of load that acts over a small distance that it can be assumed to act at a point.

Newton's 3rd Law

Each action has a reaction equal in magnitude and opposite in direction.

Centroidal Axis

An axis passing through the centroid of an area.

Moment of Inertia

Another name for the second moment of area.

246000kPa

A 5 A5cm-diameter 80cmlong steel bar is restrained from moving. If the temperature is increased 100 degrees. C, determine the induced compressive stress?Forsteel=11.7x10.6perdegreeC,E =210GP

1.5N/mm

For a uniformly distributed load of 1.5 KN/m, what is the equivalent load of this N/mm

Shearing

A stress that is caused by forces acting along or parallel to the area of resisting forces

65973N

What is the allowable load in kN on a 2-cm diameter, 1m long steel rod if the maximum elongation is limited only to 0.10cm.(Eforsteel=210x10^kPa)

elastic limit

The stress beyond which the material will not return to its original space when unloaded.

Factor of safety

The ratio of this strength (ultimate or yield strength) to allowable strength is called.

State of Stress

The state of stress in a section can be determined.

Centroid

If an area has one line of symmetry, the centroid will lie somewhere along the line of symmetry.

Deflection in a Beam

The amount of deflection in a beam can be determined.

Elastic Limit

The stress beyond which the material will not return to its original shape when unloaded.

Factor of Safety

The ratio of this strength (ultimate or yield strength) to allowable strength.

Yield Point

A point on the stress-strain diagram in which there is an appreciable elongation of the material without any corresponding increase of load.

0.00686

An elevator is suspended by a 2-cm-diameter, 30-m long steel cable. If twenty five people with a total weight of 15000N, how far in millimeters does the elevator drop?

Ultimate Strength

The highest ordinate on the stress-strain curve as maximum strength.

Unitless

What is the unit of strain?

Beams

Members primarily designed to resist bending moment in structures.

Columns

Generally, vertical structural members that resist axial compressive loads.

it is elastic

A specimen is subjected to a load when the load is removed. The strain disappears. From this information, which can be deducted about the material?

rubber

Which of the following is a "non-hookean" material?

If the resultant force acting on a particle is zero, the particle remains at rest

Newton's First Law of Motion states that:

1 Mpa

Ablock100mmx100mmbaseand10mm height.Whatwillbethedirectshearstress intheelementwhenatangential forceof 10kNisappliedtotheupperedgetoa displacement 1mmrelative to the lower face?

Normal Stress

The stress which acts in a direction perpendicular to the area.

Shear Force Diagram

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

True

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

+96lb;+64lb

.-225.90N

If the x-and y-components of the forces on the figures shown are -105N and -200N, respectively, what is the magnitude of the resultant force?

Tensile

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

3.33kN

Kn/M

SI unit for bending moment.

Weight

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

16 kn

In the figure below, find the reaction at point A or Ra (refer to the next question's diagram)

-9

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

5250 lbs

In the figure below, if the system is in equilibrium ,what is Fbc=?

Neutral Axis

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

Free Body Diagram

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

3

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

Kn

SI unit for shear force

97.73 N

False (Tensile and Compressive)

The types of normal stresses are shear and bending