QUESTION 14 A component is fabricated from a titanium alloy that has a plane strain fracture toughness of 60MPam 1/2. It has been determined that fracture results at a stress of 400MPa when the maximum internal crack length is 14.0mm. For this same component and alloy, determine the critical internal crack length that fracture will occur at a stress level of 300MPa. O a. 12.4 mm O b.49.8 mm c. 18.7 mm O d. 24.9 mm

QUESTION 14 A component is fabricated from a titanium alloy that has a plane strain fracture toughness of 60MPam 1/2. It has been determined that fracture results at a stress of 400MPa when the maximum internal crack length is 14.0mm. For this same component and alloy, determine the critical internal crack length that fracture will occur at a stress level of 300MPa. O a. 12.4 mm O b.49.8 mm c. 18.7 mm O d. 24.9 mm

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

Compute the minimum critical surface crack (edge crack) length if the fatigue life must be a minimum of 5.0 x 106 cycles. Assume the initial maximum edge surface crack length of 1.80 mm and a maximum tensile stress of 160 MPa and minimum stress of 0 MPa. Assume m = 1.8 and A= 7.5 x 1013 in MPa and meter units, Assume Y= 1.25. O a. 4.26 mm O b. 5.38 mm OC. 2.36 mm O d.0.125 m
Question 2 A machine component is made of Aluminium alloy having an ultimate tensile stress Ou = 350MPa, a fracture toughness Kic= 40 MPa√m and a geometry factor Y=1.12. The component is subject to cyclic tensile stress of 200 MPa and cyclic compressive stress of 70 MPa. Before the operation, using an ultrasonic non-destructive testing technique, it was found that there is an edge crack of length 2mm. The crack growth C(AK)m, where is in m/cycle, AK ΔσΥ νπα , C ~ 2.2×10-12 da rate is given by da dN dN and m=3.2. Find the critical crack length. = =
Estimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the propagation of an elliptically shaped surface cra of length 0.5 mm and having a tip radius of curvature of 0.005 mm, when a stress of 1040MPa is applied. Your answer must be in GPa. Write your answer to 1 decimal place. Answer: V 30 (0) 00 a W 4340 steel alloy. Determine the ductile to brittle transition
QUESTION 8 A fixation plate (thickness 3 mm, width 40 mm) has a circular hole of radius 5 mm. The plate contains a crack of length a=16 mm. If the material has a fracture toughness of 90 MPa m^(1/2), calculate the maximum allowable tensile stress the plate can experience before it has uncontrollable crack growth. O 200.7 MPa O 315.4 MPa O 250.6 MPa O 20.07 MPa
ASAP
According to Griffith's theory for brittle fracture, the stress required to propagate a crack is: (This question has more than one correct answer) 0.5 a. Proportional to a' where 2a is the crack length b. More than the ideal fracture stress -0.5 c. Proportional to a d. Less than the ideal fracture stress e. Proportional to the surface energy y0.5 f. Proportional to the surface energy y
An aircraft component is fabricated from an aluminum alloy that has a plane strain fracture toughness of 37 MPa/m. It has been determined that fracture results at a stress of 249 MPa when the maximum (or critical) internal crack length is 2.16 mm. a) Determine the value of Yora for this same component and alloy at a stress level of 323 MPa when the maximum internal crack length is 1.08 mm. i MPa /m b) Under these circumstances will the component fail?
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?
Estimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the propagation of an elliptically shaped surface crack of length 0.7 mm and having a tip radius of curvature of 0.004 mm, when a stress of 1046MPa is applied. Your answer must be in GPa. Write your answer to 1 decimal place. Answer: 0 √ Vo (88) + TI a F
A tensile test specimen of stainless steel alloy having a diameter of 0.495 in. and a gage length of 2.00 in. was tested to fracture. Stress and strain data obtained during the test are shown. Determine the true fracture stress if the final diameter of the specimen at the location of the fracture was 0.350 in. Stress (ksi) 120 Upper scale Lower scale H 0.0 0.020 0.040 0.060 0.080 0.100 0.120 0.0 0.002 0.004 0.006 0.008 0.010 0.012 Strain (in./in.) 90 60 30 0- 300 ksi O 126 ksi EA O 237 ksi O 202 ksi O 261 ksi
1 Q 4 N Current Attempt in Progress 30¹ F1 A specimen of a 4340 steel alloy with a plane strain fracture toughness of 54.8 MPa m (50 ksi vin.) is exposed to a stress of 978.0 MPa (141800 psi). Assume that the parameter Y has a value of 1.18. - Your answer is partially correct. @ 2 (a) If the largest surface crack is 0.9 mm (0.03543 in.) long, determine the critical stress o. i 1608.13 (b) Will this specimen experience fracture? W S Yes v eTextbook and Media Hint Save for Later 38 command F2 # 3 E D 80 F3 X C $ 4 R MPa 000 000 F4 F % 5 V F5 T G 6 B MacBook Pro Y H & 44 N U 8 J Attempts: 1 of 5 used en l M 9 K DD F9 0 < H I -O L Submit Answer A F10 P V . t C F11 { command option [ + " = ? |
Q1. (i) Initial strain Please enter your supplied question data Q1. (ii) Eo B (hr¹Pa-¹) n IVICUITO Fracture 0.003 Please enter your answers here Your Q1. (i) Answers: 4.60E-34 Q1. (ii) 3.2 Q2. o (Pa) σo (Pa) 780,000,000 Q3. t (hr) Q2. A component is made from a metal that is known to be viscoelastic and behaves according to a secondary creep rate equation with constants of B and n provided as your input values. If the component is subjected to a constant force that results in the initial strain of E provided to you, determine the design stress for a secondary creep life of 1,000 hrs before attaining a limiting strain, &, of 0.01. Q3. If the same component is subjected to a constant displacement that results in the value of initial stress, o, provided to you, calculate the time for the stress to reduce to 200MPa. Young's modulus of the bolt is E = 200GPa.