AIRCRAFT STRUCTURE I M3

Question 1

The _________ or ___________ is the maximum stress (tensile, compressive or bending) that is allowed to be applied on a structural material.

Answer 1

allowable stress or allowable strength

Question 2

The _______________ are generally defined by building codes, and for steel, and
aluminum is a fraction of their yield stress (strength)

Answer 2

allowable stresses

Question 3

___________ is the maximum stress that can be applied before it begins to change shape permanently.

Answer 3

Yield stress (strength)

Question 4

This is an approximation of the elastic limit of the steel.

Answer 4

Yield stress (strength)

Question 5

If _______ is added to the metal but does not reach the yield point, it will return to
its original shape after the stress is removed

Answer 5

stress

Question 6

_______________ are structures that can be analyzed using statics equations only, (i.e., equilibrium in all directions).

Answer 6

Statically determinate structures

Question 7

______________ can’t be analyzed using statics equations only

Answer 7

statically indeterminate structures

Question 8

they require other material properties, such as deformations, in order to analyze them.

Answer 8

statically indeterminate structures

Question 9

When all forces in a structure is determined from equilibrium equations, the structure is known as statically determined.

Answer 9

Determinate structure

Question 10

Support will not develop moment and horizontal force to prevent collapse.

Answer 10

Determinate structure

Question 11

No load redistribution.

Answer 11

Determinate structure

Question 12

Bending moment and shear force at any section of beam is independent of material
property and cross section of the structure.

Answer 12

Determinate structure

Question 13

No stresses due to lack of fit and temperature variations.

Answer 13

Determinate structure

Question 14

When unknown forces in a structure are more than available equilibrium equations,
that structure is known as statically indeterminate structure.

Answer 14

Indeterminate structure

Question 15

Support will develop moment and horizontal force to prevent collapse.

Answer 15

Indeterminate structure

Question 16

Tendency to redistribute load.

Answer 16

Indeterminate structure

Question 17

Bending moment and shear force at any section of beam is depends on material
property and cross section of the structure.

Answer 17

Indeterminate structure

Question 18

Stresses caused due to lack of fit and temperature variations.

Question 19

Three laws of mechanics describing the _____ of a body.

Answer 19

motion

Question 20

The ____ law states that a body remains at rest or in uniform motion in a straight line unless acted upon by a force.

Answer 20

first

Question 21

The ____ law states that a body’s rate of change of momentum is proportional to the force causing it.

Answer 21

second

Question 23

The _____ law states that when a force acts on a body due to another body, then an equal and opposite force acts simultaneously on that body.

Answer 23

third