A copper bar of circular cross-section is heated and its expansion is constrained, it will develop
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Edson
A 5mm x 5mm x 100mm steel bar free to expand is heated from 15ᵒC to 40ᵒC ,it will develop
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Edson
A steel bar 2.5cmdiameter is rigidly attached to two parallel supports 8m apart. Find the pull exerted by the bar on the support when the temperature is increased by 100ᵒC
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Edson
(a) if the support do not yield,
(b)if yielding of both supports is 0.25cm
A copper bar 25cm long is fixed by means of a sinking support at its ends which yields by an amount 0.01cm. If the temperature of the bar is raised by 20ᵒC ,Calculate the stresses induced in the bar. Coefficient of linear expansion for copper . αc = 17.5 x 10-6 per ᵒC, Ec = 98GPa
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Edson
Two parallel walls 6m apart are stayed together by a steel rod 2.5cm diameter at temperature of 80ᵒC passing through washers and nuts at each end. Calculate the pull excerted by the rod when it has cooled to 22ᵒC :
Question
Edson
(a) If the walls do not yield, and
(b) If the total yield at the two ends is 1.5mm
A rod is 2m long at a temperature of 10ᵒC .Find the expansion of the rod when the temperature is raised to 80ᵒC .If this expansion is prevented find the stress in the material of the rod .Take E = 100GN/M2 and α = 12 x 10-6/ᵒC
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Edson
A mild steel test piece was tested in tension and the following readings were obtained:
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Edson
Diameter of specimen = 20mm
Length of specimen = 20cm
Extension under 30kN load = 0.08mm
Load at yield point = 150kN
Maximum load = 225kN
The units of strain are:
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Edson
Free body diagram is the diagram:
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Edson
The yield point of brittle materials can be ascertained by drawing a line parallel to the stress-strain curve at:
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Edson