PoE - Beam Deflection

A mathematical property of a cross section (measured in inches) that gives important information about how that cross-sectional area is distributed about a centroidal axis:

• Centroid Principles

• Moment of Inertia

• Modulus of Elasticity

• Beam Deflection

The ratio of the increment of some specified form of stress to the increment of some specified form of strain. Also known as coefficient of elasticity, elasticity modulus, elastic modulus:

• Centroid Principles

• Moment of Inertia

• Modulus of Elasticity

• Beam Deflection

Object’s center of gravity or center of mass.

• Centroid Principle

• Moment of Inertia

• Modulus of Elasticity

• Beam Deflection

Beam A and B are the same material and same dimensions. What distinguishes beam A from beam B?

• Beam A will have a greater resistance to bending because it has a lower moment of inertia.

• Beam A will have a greater resistance to bending because it has a higher moment of inertia.

• Beam B will have a greater resistance to bending because it has a lower moment of inertia.

• Beam B will have a greater resistance to bending because it has a higher moment of inertia.

Correct formula for calculating beam deflection:

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Given the information above, calculate the beam deflection for Beam A:

• .12 inches

• 1.39 inches

• .53 inches

• .24 inches

In the formula above, how to do read the 'Σ' symbol?

• Average of

• Product of

• Sine of 

• Sum of

Flashback: Second Law of Thermodynamics

• Thermal energy can change form and location, but it cannot be created or destroyed

• Law of energy conservation applied to a thermal system

• Thermal energy flows from hot to cold

• The transfer of thermal energy by movement of fluid (liquid or gas)

Flashback: Thermal Energy Transfer Equation

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Flash-forward: soh cah toa

• The three ratios for electronic circuits

• a phrase to remember the three trigonometric functions

• Relationships of three types of trusses

• Names of the three blind mice