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Strength of materials W / Sterkteleer W - 244
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2.3 Calculate the elongation of each bolt.
Give your answer to 3 significant figures.
Question 2
A local composite manufacturer uses filament winding to manufacture carbon fibre reinforced polymer (CFRP) tubes for rocket structures. To test the tubes, a CFRP tube is clamped between two rigid end plates and secured by four M8 bolts that are symmetrically spaced at each corner of the end plate, as shown in the sectioned, cut away view below.
For a CFRP tube with outer diameter 47 mm and wall thickness 4.1 mm, if the nuts are turned 0.5 turns to clamp the tube
2.1 Calculate the axial stress in each bolt.
Give your answer to 3 significant figures
1.2 Determine the strain in the wider section (but where it is not clamped) when the strain in the gauge length is 0.001, same as Q1.1.
Give your answer to 3 significant figures.
Determine the total elongation of the specimen at the point where the strain in the gauge length section is 0.001.
Give your answer to 3 significant figures.
What fraction of the total elongation of the tensile test specimen occurs over the gauge length?
Question 1
A flat tensile test specimen with a thickness of 4.6 mm, as indicated by the cross hatched cross section shown, is clamped in a tensile test machine over 10 mm at each end, as indicated by the shaded areas in the figure. The width of the clamped section is 5.7 mm while the width of the gauge section is 4.5 mm. This is a titanium alloy specimen so E = 110 GPa.
1.1 Determine the load (internal force) in the 20-mm gauge section when the strain in this section is 0.001.
Give your answer to 3 significant figures.
3.3 Determine the value of the maximum shear stress.
Give your answer to 3 significant figures.
3.4 Determine the value of the maximum bending moment.
Give your answer to 3 significant figures.
3.2 Determine the value of the vertical reaction force at A, assuming the an upwards force is positive.
Give your answer to 3 significant figures.
Beam AB is pinned at A and rests on a bearing pad at B that exerts a uniformly distributed load on the beam over its length LB = 0.7 m, as shown in the figure below.
3.1 Determine the value of the uniformly distributed load exerted by the bearing pad over length LB.
Give your answer to 3 significant values.