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a. A new grade of steel with enhanced corrosion resistance is proposed for use in the nuclear industry; however, little is known about the fracture toughness and an engineer is asked to investigate. Bend samples are fatigue cracked and then loaded to failure. The engineer tested three samples and the results are summarised below. Table 1 Test results Sample W (mm) B (mm) a (mm) Load at failure (kN) 20 5 9.8 2.3 2 20 10 9.4 4.4 3 20 20 20 10.1 8.6 For the geometry used, the stress at failure is calculated from σ 225P B Pa where P is in newtons and B is in metres. (Note that this is an empirical formula so the units do not balance.) i. Use the 'Beam in pure bending - through-thickness edge crack' geometry in the K-calculator to calculate the value of K at failure for the three samples.

a. A new grade of steel with enhanced corrosion resistance is proposed for use in the nuclear industry; however, little is known about the fracture toughness and an engineer is asked to investigate. Bend samples are fatigue cracked and then loaded to failure. The engineer tested three samples and the results are summarised below. Table 1 Test results Sample W (mm) B (mm) a (mm) Load at failure (kN) 20 5 9.8 2.3 2 20 10 9.4 4.4 3 20 20 20 10.1 8.6 For the geometry used, the stress at failure is calculated from σ 225P B Pa where P is in newtons and B is in metres. (Note that this is an empirical formula so the units do not balance.) i. Use the 'Beam in pure bending - through-thickness edge crack' geometry in the K-calculator to calculate the value of K at failure for the three samples.

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
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please can you assist me in answering the question i have added in the images. many thanks. 

a. A new grade of steel with enhanced corrosion resistance is proposed for use in the nuclear industry; however, little is known about the fracture toughness and an engineer is asked to investigate. Bend samples are fatigue cracked and then loaded to failure. The engineer tested three samples and the results are summarised below. Table 1 Test results Sample W (mm) B (mm) a (mm) Load at failure (kN) 20 5 9.8 2.3 2 20 10 9.4 4.4 3 20 20 20 10.1 8.6 For the geometry used, the stress at failure is calculated from σ 225P B Pa where P is in newtons and B is in metres. (Note that this is an empirical formula so the units do not balance.) i. Use the 'Beam in pure bending - through-thickness edge crack' geometry in the K-calculator to calculate the value of K at failure for the three samples.
Transcribed Image Text:a. A new grade of steel with enhanced corrosion resistance is proposed for use in the nuclear industry; however, little is known about the fracture toughness and an engineer is asked to investigate. Bend samples are fatigue cracked and then loaded to failure. The engineer tested three samples and the results are summarised below. Table 1 Test results Sample W (mm) B (mm) a (mm) Load at failure (kN) 20 5 9.8 2.3 2 20 10 9.4 4.4 3 20 20 20 10.1 8.6 For the geometry used, the stress at failure is calculated from σ 225P B Pa where P is in newtons and B is in metres. (Note that this is an empirical formula so the units do not balance.) i. Use the 'Beam in pure bending - through-thickness edge crack' geometry in the K-calculator to calculate the value of K at failure for the three samples.
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