I need answer of question 4 only A 250mm plate of a 4340 steel is tested for quality control purposes. It fails at a stress of 550MPA and themodulus is measured as 21OGPA. Examination of the fracture surface shows that failure of the steel was due tothe 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 = oTa30.027Question 4If the 250mm plate of 4340 from Question 3 is to be used to make a shaft which experiences a maximum loadof 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

given; ⇒for maximum toughness of plate (K1)=?⇒plate fails at stress (σ)=550MPa⇒internal flaw…

Answered: A 250mm plate of a 4340 steel is tested…

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

A brass specimen of the circular cross-section is fractured at 151 kN force and the final length of the specimen at fracture is 49 mm. The fracture strength of the specimen is found to be 74 kN/mm2. The percentage of elongation of the specimen is 42 %. Determine the following (i) Diameter of the specimen ii) Initial length of the specimen iii) Stress under an elastic load of 16 kN iv) Young's Modulus if the elongation is 1.6 mm at 16 kN (v) Final diameter if the percentage of reduction in area is 20 % solve: Final Diameter of the Specimen after Fracture (in mm) =
A brass specimen of the circular cross-section is fractured at 159 kN force and the final length of the specimen at fracture is 51 mm. The fracture strength of the specimen is found to be 85 kN/mm2. The percentage of elongation of the specimen is 42 %. Determine the following 1-Initial Cross-sectional Area (in mm2) 2-The Diameter of the Specimen (in mm) 3-Initial Length of the Specimen (in mm)
A brass specimen of the circular cross-section is fractured at 159 kN force and the final length of the specimen at fracture is 51 mm. The fracture strength of the specimen is found to be 85 kN/mm2. The percentage of elongation of the specimen is 42 %. Determine the following 4-Stress under an elastic load of 14 kN 5-Young's Modulus if the elongation is 1.5 mm at 14 kN 6-Final diameter if the percentage of reduction in area is 27 %.
A steel rod specimen with a diameter of 200mm was subjected to a force 5000 N in the stress-strain experiment, if the area of the rod at fracture was 25434 mm^2, determine the percentage of the sample ductility (RA).
A tie rod made of quenched and tempered 4340 steel is used as a critical linkage in an industrial apparatus. The rod is subjected to an alternating cyclic tensile/compressive stress from 550 MPa to -550 MPa. An inspection of the rod revealed a 3.5 mm deep edge crack on the surface of the rod. Please answer the following question for the rod given the properties in the table and curve below and fracture toughness of 55 MPa√m. (NOTE: Y=1.12 for edge crack and use “a” not “2a” for the length of the crack) 1. At the given crack size and tensile loading would the rod undergo instantaneous fast fracture, assuming plane strain conditions? Show calculations to back up your conclusions.
A tie rod made of quenched and tempered 4340 steel is used as a critical linkage in an industrial apparatus. The rod is subjected to an alternating cyclic tensile/compressive stress from 550 MPa to -550 MPa. An inspection of the rod revealed a 3.5 mm deep edge crack on the surface of the rod. Please answer the following question for the rod given the properties in the table and curve below and fracture toughness of 55 MPa√m. (NOTE: Y=1.12 for edge crack and use “a” not “2a” for the length of the crack) 1. What is the minimum crack size that would cause instantaneous fast fracture at the current maximum axial tensile loading, assuming plane strain conditions apply? If the resolution limit of the flaw detection apparatus were 1.5 mm, would this flaw be subject to detection? Show calculations to back up your conclusions.
A tie rod made of quenched and tempered 4340 steel is used as a critical linkage in an industrial apparatus. The rod is subjected to an alternating cyclic tensile/compressive stress from 550 MPa to -550 MPa. An inspection of the rod revealed a 3.5 mm deep edge crack on the surface of the rod. Please answer the following question for the rod given the properties in the table and curve below and fracture toughness of 55 MPa√m. (NOTE: Y=1.12 for edge crack and use “a” not “2a” for the length of the crack) 1. Given the S-N curve for 4340 steel, is there an endurance limit? If so, what is the stress value for the endurance limit? 2. If there were no cracks and the stress on the rod still alternated from 550 MPa to -550 MPa with mean stress of zero, what would be the cycles to failure?
An 820 MPa (145,000 psi) stress is applied to a specimen of 4341 steel alloy, which has a plane strain fracture toughness of 45MPa squareroot (m). If the greatest surface crack is 0.95 mm (0.03 in) long, will this specimen fracture as a result? Assume that the parameter Y is 1.22.
A bar made of carbon-steel of size 12mm x 20mm has a yield stress of 400 MPa and ultimate tensile strength of550 MPa. Tha gauge length of the specimen tested under tension loading is 350mm. a. Determine its elongation when a tension load of 75 KN is applied. b. Determine the maximum load the bar can take before it fractures. Take Youngs Modulus of steel as 200,000 MPa
cylindrical specimen of steel having an original diameter of 0.505 in. is tensile tested to fracture and found to have an engineering fracture strength of 67,000 psi. If its cross-sectional diameter at fracture is 0.422 in, determine:(a) The ductility in terms of percent reduction in area(b) The true stress at fracture
A mild steel tensile specimen of initial length 44 mm and initial diameter 6.4 mm is subjected to a tensile test and the following data are obtained. - Yield Strength as 88 MPa - Maximum Strength as 212 MPa - Fracture Strength as 152 MPa - Percentage of Elongation as 63 % - Percentage of Reduction in area as 39% Determine the Fracture load The Final length in mm = The Final area in mm2 =
Question: Some aircraft component is fabricated from an aluminum alloy that has a plane strain fracture toughness of 40 MPa sqrt(m) (36.4 ksi sqrt(in.)). It has been determined that fracture results at a stress of 300 MPa (43,500 psi) when the maximum (or critical) internal crack length is 4.0 mm (0.16 in.). For this same component and alloy, will fracture occur at a stress level of 260 MPa (38,000 psi) when the maximum internal crack length is 6.0 mm (0.24 in.)? Why or why not?

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