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A 250mm plate of a 4340 steel is tested for quality control purposes. It fails at a stress of 550MPa and the modulus is measured as 210GP.. Examination of the fracture surface shows that failure of the steel was due to the presence of an internal flaw which was measured to be 1mm in length. What is the toughness of the plate? Express your answer in MPa/m. Useful formulae: K = 0 na 30.027 Question 4 If the 250mm plate of 4340 from Question 3 is to be used to make a shaft which experiences a maximum load of 200MPA and an internal falw size of 4mm, is the plate safe to use to manufacture the shaft? Select either "True" or "False" as your answer. Useful formulae:K = 0/na

A 250mm plate of a 4340 steel is tested for quality control purposes. It fails at a stress of 550MPa and the modulus is measured as 210GP.. Examination of the fracture surface shows that failure of the steel was due to the presence of an internal flaw which was measured to be 1mm in length. What is the toughness of the plate? Express your answer in MPa/m. Useful formulae: K = 0 na 30.027 Question 4 If the 250mm plate of 4340 from Question 3 is to be used to make a shaft which experiences a maximum load of 200MPA and an internal falw size of 4mm, is the plate safe to use to manufacture the shaft? Select either "True" or "False" as your answer. Useful formulae:K = 0/na

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A 250mm plate of a 4340 steel is tested for quality control purposes. It fails at a stress of 550MPA and the modulus is measured as 21OGPA. Examination of the fracture surface shows that failure of the steel was due to the presence of an internal flaw which was measured to be 1mm in length. What is the toughness of the plate? Express your answer in MPa/m. Useful formulae: K = oTa 30.027 Question 4 If the 250mm plate of 4340 from Question 3 is to be used to make a shaft which experiences a maximum load of 200MPa and an internal falw size of 4mm, is the plate safe to use to manufacture the shaft? Select either "True" or "False" as your answer. Useful formulae:K = o/na
Transcribed Image Text:A 250mm plate of a 4340 steel is tested for quality control purposes. It fails at a stress of 550MPA and the modulus is measured as 21OGPA. Examination of the fracture surface shows that failure of the steel was due to the presence of an internal flaw which was measured to be 1mm in length. What is the toughness of the plate? Express your answer in MPa/m. Useful formulae: K = oTa 30.027 Question 4 If the 250mm plate of 4340 from Question 3 is to be used to make a shaft which experiences a maximum load of 200MPa and an internal falw size of 4mm, is the plate safe to use to manufacture the shaft? Select either "True" or "False" as your answer. Useful formulae:K = o/na
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