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 thenuclear industry; however, little is known about the fracture toughness and anengineer is asked to investigate. Bend samples are fatigue cracked and then loadedto failure. The engineer tested three samples and the results are summarised below.Table 1 Test resultsSampleW (mm)B (mm)a (mm)Load at failure (kN)2059.82.3220109.44.4320202010.18.6For the geometry used, the stress at failure is calculated fromσ225PBPawhere P is in newtons and B is in metres. (Note that this is an empirical formula sothe units do not balance.)i. Use the 'Beam in pure bending - through-thickness edge crack' geometry in theK-calculator to calculate the value of K at failure for the three samples.

Answered: Image /qna-images/answer/fccb1b7c-b40e-4b32-9293-a457f490763c.jpg

Answered: a. A new grade of steel with enhanced…

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

See similar textbooks

Similar questions

Note: for tackling parts of this question, you will need to use the K-calculator; i have provided a screenshot of the K calculator and i am inly looking for input vales for this. 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. Test results Sample W (mm) B (mm) a (mm) Load at failure (kN) 1 20 5 9.8 2.3 2 20 10 9.4 4.4 3 20 20 10.1 8.6 For the geometry used, the stress at failure is calculated from the equation added below. 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…
Tensile engineering stress-strain curves through failure are depicted below. Which specimen features the highest toughness? Engineering Stress, MPa 1800- 1600- 1400- 1200- 1000- 800- 600- 400- 200- Ol 0 Aluminum Alloy 2024-T81 0.04 0.08 Stainless Steel (18-8) 1340 Steel, Water-Quenched & Tempered at 370 C Magnesium 0.12 Structural Steel (Mild Steel) Engineering Strain 0.16 1340 Steel, Water-Quenched & Tempered at 370°C Aluminum Alloy 2024-T81 Structural Steel (Mild Steel) Stainless Steel (18-8) Magnesium 0.20 0.24
ASAP
Which one is correct and why please ?
QUESTION 18 A chemicals company is looking to optimise the materials selection for their synthesis vessel with safety being the key priority. The tank can be treated as a small thin-walled spherical pressure vessel and the engineers are considering a 'yield before break' design concept. Given that a crack of length will propagate by fast fracture when the stress intensity factor reaches the fracture toughness of the material select the correct materials property index relevant to this design criterion. Fracture toughness K₁=Y₁₁√√ IC O M= O M= OM= OM= O M= OM= K f P K 2 IC K IC 6 f 6 P K f IC σα y K IC 2 f IC
QUESTION 18 A chemicals company is looking to optimise the materials selection for their synthesis vessel with safety being the key priority. The tank can be treated as a small thin-walled spherical pressure vessel and the engineers are considering a 'yield before break' design concept. Given that a crack of length will propagate by fast fracture when the stress intensity factor reaches the fracture toughness of the material select the correct materials property index relevant to this design criterion. Fracture toughness K₁=Y₁₁√√ IC O M= O M= O M= COM: = O M= O M= K 6 6 P K IC K K IC P σα y 6 IC K IC 2 f IC 2
QUESTION 14 A precipitation strengthened aluminium alloy has the following material properties: E = 75 GPa o = 450 MPa y K = 35.4 MPa m¹/2 C On inspection of a lightweight pressure vessel, a plate made from this alloy, with a width of 35 mm, is found to contain an edge-crack with a length of 3.5 mm during a regular maintenance inspection. Under standard operating conditions, this plate is subjected to a peak stress of 125 MPa. Estimate the critical crack length (ac) for fast fracture to occur under the applied stress. Give your answer in millimetres (mm) to an accuracy of two decimal places. Do not include the units 'mm' in your answer. Only give the numerical value. The stress intensity is given by the standard equation (K=Yona) where Y= 1.12 for an edge-crack in a semi-infinite width plate. πα
(a) A large medium carbon steel crane hook is thought to contain penny- shaped internal cracks. If the non-destructive test equipment used on the hook is not capable of detecting cracks smaller than 20 mm diameter, determine the fracture toughness required from this steel if the safety factor on stress is to be 2. The yield stress of the AISI 1045 grade steel is 1050 MNm². Note: For this crack geometry, the 'compliance function' Y in the Stress Intensity Factor (K) may be taken as 1. (b) A surface crack of 2.5 mm depth and a certain length is found in a thick rectangularcomponent. The component is schedule to be repaired in 6 months. The component is subjected to zero to maximum stress of 340 MPa, 50 times per hour. It was known that for this component catastrophic failure occurs when the crack size reaches 12 mm in depth. Assuming that the crack geometrical shape (aspect ratio) remains constant during crack growth, will the component fail before repair? For the crack geometry, the…
(a) A large medium carbon steel crane hook is thought to contain penny- shaped internal cracks. If the non-destructive test equipment used on the hook is not capable of detecting cracks smaller than 20 mm diameter, determine the fracture toughness required from this steel if the safety factor on stress is to be 2. The yield stress of the AISI 1045 grade steel is 1050 MNm². Note: For this crack geometry, the 'compliance function' Y in the Stress Intensity Factor (K)) may be taken as 1. (b) A surface crack of 2.5 mm depth and a certain length is found in a thick rectangularcomponent. The component is schedule to be repaired in 6 months. The component is subjected to zero to maximum stress of 340 MPa, 50 times per hour. It was known that for this component catastrophic failure occurs when the crack size reaches 12 mm in depth. Assuming that the crack geometrical shape (aspect ratio) remains constant during crack growth, will the component fail before repair? For the crack geometry, the…
Small Question please answer
Stuck need help! Problem is attached. please view attachment before answering. Really struggling with this concept. Please show all work so I can better understand ! Thank you so much.
Note: this is not assignment question and not a graded question

SEE MORE QUESTIONS

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS