A simply supported beam of circular cross-section made up of hot rolled steel is subjected to a fluctuating load that varies from -F to +3F. Determine the minimum ultimate strength of the beam material which can withstand the fluctuating loads. The variable forces on the beam induce corresponding fluctuating stresses between + 82 N/mm2 to –42 N/mm2. Assume the following values: Yield strength = 0.55 ultimate strength, endurance stress = 0.45 ultimate strength. Take a factor of safety = 2. Use Soderberg relation in your design, i) Calculate the mean stress in N/mm2 and variable stress in N/mm2           ii) Calculate the Ultimate Strength in N/mm2                                                             iii) Calculate the endurance strength in N/mm2

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A simply supported beam of circular cross-section made up of hot rolled steel is subjected to a fluctuating load that varies from -F to +3F. Determine the minimum ultimate strength of the beam material which can withstand the fluctuating loads. The variable forces on the beam induce corresponding fluctuating stresses between + 82 N/mm2 to –42 N/mm2. Assume the following values: Yield strength = 0.55 ultimate strength, endurance stress = 0.45 ultimate strength. Take a factor of safety = 2. Use Soderberg relation in your design,

i) Calculate the mean stress in N/mm2 and variable stress in N/mm2          

ii) Calculate the Ultimate Strength in N/mm2                                                            

iii) Calculate the endurance strength in N/mm2                                                        

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