Definitions

Question 1

Failsafe

Answer 1

In the event of a failure, the component as a whole remains safe

Question 2

Safelife

Answer 2

The designed life span of a component in which it remains safe

Question 3

Damage tolerace

Answer 3

Ability of a structure to sustain defects safely until repairs can be done

Question 4

Faulty tolerant

Answer 4

Design of a component that enables it to remain functional at a reduced level

Question 5

Measuring Safe life

Answer 5

Can be done as a measure of cycles, landings, calendar duration

Question 6

Redundancy

Answer 6

Duplication of components to use in the event of a failure

Question 7

Stress

Answer 7

THe internal force per unit area inside a structure component as a result of external loads

Question 8

Strain

Answer 8

Deformation caused by stress on a material, given as a change of dimension, or percentage of original

Question 9

Dynamic Load

Answer 9

Forces imposed by manoeuvres, They build and subside very quickly. E.g. takeoffs, landings, banking

Question 10

Static Loads

Answer 10

Build and decline slowly over time, basically constant. E.g. in constant flight or on the ground

Question 11

Cyclic loads

Answer 11

Loads that reoccur regularly, rapidly changing requencies, e.g. pressurisation.

Question 12

Tension

Answer 12

Pulling apart force

Question 13

Compression

Answer 13

Pushing together force

Question 14

Torsion

Answer 14

Twisting force

Question 15

Shear

Answer 15

Rotational force

Question 16

Elastic Deformation

Answer 16

A material that will return to its original form

Question 17

Plastic deformation

Answer 17

A material which will not return to its original form

Question 18

Factor of safety

Answer 18

A built in tolerance above the normal use parameters

Question 19

Limit load

Answer 19

THe limit of load used in normal manoeuvres or functinos

Question 20

Ultimate load

Answer 20

1.5 times the limit load, this is the factor of safety. IT is OK to move into this load for short periods of time if necessary

Question 21

Fatigue

Answer 21

Microscopic cracks forming in materials over time from normal cyclic loads.