3) On the same oil derrick job (Some oil derricks on the north slope of Alaska i
ID: 908337 • Letter: 3
Question
3) On the same oil derrick job (Some oil derricks on the north slope of Alaska installed by your Texas firm last summer performed fine for six months, then failed catastrophically when a blizzard blew in. Analysis showed the wind had literally blew the rigs apart with the SAE 416 Stainless steel being fractured into small pieces without deformation. Analysis also showed that the design was fine, there were no external environmental or chemical or mechanical (other than 60 kph wind and -65 °C temperatures) influences that caused failure, bringing attention onto SAE 416 Stainless used in the construction.), all four tires on your Range Rover failed catastrophically while you were driving from rig to rig during the storm. It looked like someone had torn the tires into pieces, but they couldn't have. You were driving at the time. Security video showed nobody near the vehicle when it was parked. The tires were made of E-SBR. What do you think could have happened? Explain. Can you propose a solution for future visits?
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Answer the question in clear words and in very good description!!! Please type your answer. Thanks
Explanation / Answer
Blizzard is a strength of the wind, Measurements in a blizzard provide an electric field profile, with measured fields as high as 30 kV m-1 measured at the 4-cm height. Reversal of charge sign on samples of saltation particles collected in a blizzard indicates a mixture of positive and negative particles in transport. This result points out the need for measurements of charge on individual particles, electrostatic forces as large as the gravitational force on some saltating particles.
May this elecrostatic force effect the stainless steel. To over come this problem we have to make the the electrostatic force free (charge free) stainless steel and tyres. That means we have to make the thickness and charge neutralising material.
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