5. The drill pipe shown in the figure below is designed as a hollow shaft with an outer diameter of 80mm, inner diameter of 70 mm, weight of 800 N/m and a length of 12 m. The pipe is made of steel alloy with a modulus of elasticity of 200 GPa. If the pipe is subjected to an axial load P of 7500 N and it is turning at a speed of 60 rev/min driven by a 7500 Watt diesel engine, determine the following: a) The average bearing stress. b) The normal compressive stress developed at section a-a located at half the pipe's length.
5. The drill pipe shown in the figure below is designed as a hollow shaft with an outer diameter of 80mm, inner diameter of 70 mm, weight of 800 N/m and a length of 12 m. The pipe is made of steel alloy with a modulus of elasticity of 200 GPa. If the pipe is subjected to an axial load P of 7500 N and it is turning at a speed of 60 rev/min driven by a 7500 Watt diesel engine, determine the following: a) The average bearing stress. b) The normal compressive stress developed at section a-a located at half the pipe's length.
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Transcribed Image Text:5. The drill pipe shown in the figure below is designed as a hollow shaft with an outer diameter of
80mm, inner diameter of 70 mm, weight of 800 N/m and a length of 12 m. The pipe is made of
steel alloy with a modulus of elasticity of 200 GPa. If the pipe is subjected to an axial load P of
7500 N and it is turning at a speed of 60 rev/min driven by a 7500 Watt diesel engine, determine
the following:
a) The average bearing stress.
b) The normal compressive stress developed at section a-a located at half the pipe's length.
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