11.2 Structura Stresses

Question 1

What is tension stress?

Answer 1

Tension is stress that resists the forces which pull it apart. For example, engine thrust pushes the aircraft forward, but air resistance holds the aircraft back and thus the result is tension.

Question 2

What is compression stress?

Answer 2

Compression is stress that resists a crushing force.

Question 3

What is torsion stress?

Answer 3

Torsion is stress that causes twisting

Question 4

What is shear stress?

Answer 4

Shear is the stress that resists the force to cause one layer of material to slide over an adjacent layer, just like rubbing against each other

Question 5

What is stress?

Answer 5

When a material is subject to a force, stress is created within a material

Question 6

What is bending?

Answer 6

Bending stress is a combination of compression and tension

Question 7

What is hoop stress?

Answer 7

Hoop stress acts circumferentially on the skin exerting a tensile force on the skins panels and longitudinal joints

Question 8

What is strain?

Answer 8

Strain is a ratio of the amount of deformation of a material caused by stress. It’s calculated by the change in length in relation to the original length

Question 9

What is fatigue?

Answer 9

Fatigue is the effect of cyclic or alternating loads on structural components. It occurs when a material weakens over time by vibration or alternating loads and begins with the appearance of a tiny crack