Maurice Tutor

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Category > Management Posted 20 Feb 2018 My Price 5.00

bimetallic thermal control

The bimetallic thermal control shown in the figure is made of a brass bar (length Lb = 20 mm and crosssectional are a Ab = 65 mm2 ) and a magnesium bar (length Lm = 30 mm and cross-sectional area Am = 130 mm2 ). The two bars are arranged so that the gap between their free ends is δ = 0.1 mm at ro om temperature. Calculate the following quaniites: (a) the temperature increase ∆T (above room temperature) at which the two bars come into contact, and (b) the stress O" in the magnesium bar when the temperature in crease ∆T is 150°C. (Use the following material properties: αb = 19.1 x 10-6/°C, αm = 26.1 x 10-6/°C, Eb = 103 GPa, and Em = 45 GPa.)

 

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Maurice Tutor
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Status NEW Posted 20 Feb 2018 06:02 PM My Price 5.00

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