a) A thin strip of rubber-like material has an unstretched length of 345 mm. i. If it is stretched around a pipe having an outer diameter of 112 mm, determine the  average normal strain in the strip, assuming linear elastic behaviour. (3 marks) ii. A steel wire of diameter dwire = 1.5 mm also has an initial length of 345 mm. The  Young’s Modulus of the steel material is 190 GPa and its yield strength is 275  MPa. What is the maximum pipe diameter that the wire can be stretched around  without yielding and what is the magnitude of the tensile force in the wire for this  elongation? Give your answers to two decimal places

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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a) A thin strip of rubber-like material has an unstretched length of 345 mm.
i. If it is stretched around a pipe having an outer diameter of 112 mm, determine the 
average normal strain in the strip, assuming linear elastic behaviour. (3 marks)
ii. A steel wire of diameter dwire = 1.5 mm also has an initial length of 345 mm. The 
Young’s Modulus of the steel material is 190 GPa and its yield strength is 275 
MPa. What is the maximum pipe diameter that the wire can be stretched around 
without yielding and what is the magnitude of the tensile force in the wire for this 
elongation? Give your answers to two decimal places

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