(c) State whether each statement is true (T) or false (F) A typical aircraft fus

Question

(c) State whether each statement is true (T) or false (F) A typical aircraft fuselage structure would be capable of carrying torsion moments Shear strain can be expressed in units of either degrees or radians The use of zeroes after a decimal point are an indicator of accuracy (rv) A material point in equilibrium has 1 independent component of shear stress in the xz plane A negative normal strain can be considered to increase or decrease volume depending on the coordinate system used The Poisson effect does not apply to shear strains In a 2D stress state in the xy plane, o, ta and tw can be ignored even if they are non-zero (vi) (vi) (vi) Plane stress occurs for thin plates undergoing in-plane loading only (ix) In plane strain, one dimension is large enough so that strain in that direction are zero At the mid-plane of a plate in pure bending the stresses are minimum The maximum shear stress causes the material to rotate by the principal angle (xi) (xi) The product second moment of area ly is found by multiplying I, and , (xii) (xiv) Sandwich materials typically use a high density core with non-structural cover plates (xv) (vi) A roller support acts like a contact boundary condition as it can produce a reaction force as a Typical metals show elastic-plastic behaviour in tension and shear but not in compression An external load and the resultant internal stresses are always statically equivalent systems push response to a body but will not produce a pull force to hold a body from moving away (xvi) The shear force diagram is always the slope of the bending moment diagram

Explanation / Answer

1-true, 2- true,3-true, 4-false, 5-false,6-true, 7-false, 8-true,

9-true, 10-true,11-true, 12-false,13-true,14-false,15-false,16-true,17-true

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