Basic Statements 5

Question 1

When a beam/structure is subjected to bending loading conditions, two types of stresses occur, normal and shear stresses

Answer 1

True - If you don’t know this i suggest you to start studying real hard

Question 2

When a beam/structure is subjected to axial loading conditions, two types of stresses occur, normal and shear stresses

Answer 2

False - Only normal stresses, however in reality there will also be shear stresses since the beam would get stretched out and shear stresses would occur where the beam gets thinner.

Question 3

An example of a ship type which is not sensitive to torsion deformation is the container vessel

Answer 3

False - Due to open cross-section large deformations could occur if the structure is not super stiff.

Question 4

A warping displacement is an out of plane deformation which occurs during torsion loading

Answer 4

True - Think about a paper which you roll into a tube. Apply torsion load, what happens, one edge goes out of the tube and the other goes into the tube

Question 5

Thin-walled and open cross-sections are influenced by the warping displacements in contrast to solid cross-sections.

Answer 5

False - Solid CS are influenced but not as much as TW

Question 6

General torsion theory was proposed by Vlasov, while St Venant theory is a special case of Vlasov torsion theory

Answer 6

True - The normal stresses are zero in St Venant due to dFi/dx is constant

Question 7

During St Venant torsion conditions, only shear stresses occur in the structure

Answer 7

True - The normal stresses are zero in St Venant due to dFi/dx is constant

Question 8

The shear stress distribution through thickness of a TW open CS structure subjected to St Venant torsion conditions is uniform

Answer 8

False - It will be linear with maximum at the edges