A steel bolt is subjected to an axial load between two rigid plates so the length of the bolt remains constant. The bolt is subjected to an elevated temperature so that creep is produced. What must be the initial stress so that 70% of the stress is retained after ten years, creep constant is 6.0. Reference stress is 7 MPa and steady state creep strain is 4.2 x 10-8mm/mm per day and elastic modulus is 210 GPa. Refer to Appendix 2 to develop your answer.

A steel bolt is subjected to an axial load between two rigid plates so the length of the bolt remains constant. The bolt is subjected to an elevated temperature so that creep is produced. What must be the initial stress so that 70% of the stress is retained after ten years, creep constant is 6.0. Reference stress is 7 MPa and steady state creep strain is 4.2 x 10-8mm/mm per day and elastic modulus is 210 GPa. Refer to Appendix 2 to develop your answer.

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 metal rod is 50 mm in diameter and 1.3 m long. The rod has a collar on one end and is suspended vertically. The height through which this load may fall if the instantaneous stress is limited to 90 MPa is 1.71870x 10-3 m. The value of Young modulus is 132.40 GPa. 2.1 Calculate an extension when a weight of 30 kN is suddenly lowered onto the collar. 2.2 Calculate the force required to cause the maximum stress.
A prismatic bar held between the two supports is heated above ambient by 30°C. Elastic Modulus ofthe material is 150 GPa and coefficient of linear expansionis 15x10-6. Find the final stress in the bar if there exists 10MPA of compressive stresses due to manufacturing defects at the ambient temperature.
PROBLEM 4. The rigid bar is supported by a pin at A and two metal wires, each having a diameter of 4 mm. The stress-strain diagram of the steel is given in the Figure below. The lower graph is the zoomed view of the elastic deformation and yielding phases of the stress-strain diagram given by the upper graph (a) Obtain the Young's modulus of metal. What can you say about the kind of metal considering the Young modulus? If the point G is displaced 1.5 mm in vertical direction, (b) determine the forces at wires EB and DC, (b) the intensity of the distributed load w, (c) the final diameters of wires. (Poisson's ratio is v-0.3) E D o (MPa) 600 500 800 mm 400 300 G. 200 10 W 400 mm 250 mm- e(mm/mm) 150 mm 0.04 0.08 0.12 0.16 0.20 0.24 0.28 00005 00010.0015 Q002 00025 0,003 00035
A steel bar which is 457 mm long is repeatedly loaded with 4500 kg in successive tension and compression cycles . Calculate the minimum diameter of the bar which will never fail by fatigue. Given yield point=300 MPa, UTS= 400 MPa , fatigue limit = 306 MPaand Elastic Modulus = 210 GPa
A prismatic bar held between the two supports is heated above ambient by 30°C. Elastic Modulus ofthe material is 150 GPa and coefficient of linear expansionis 15x106. Find the final stress in the bar if there exists 10MPA of compressive stresses due to manufacturing defects at the ambient temperature.
Calculate the Modulus of elasticity, Modulus of toughness and Modulus of Resilience for the material from stress-strain diagram below.
Derive the following equation for computing shear stress in a solid bar along an oblique plane with angle B with respect to the vertical plane. The bar is subjected to centric axial loading. sin 0 cos 0 T = Ao
Two links are connected by a single pin and a tensile force F is applied. The links and the pin are made from Aluminum(sigma_y = 35ksi and T_y = 20ksi). The dimension of the link is 5 inch high by 0.5 inch thick. Find the optimal diameter for the pin and the maximum force,F that can be applied to the linkage before incuring permanent deformation.
The material for the bolt shown in Figure 2, the angled joint has an ultimate tensile strength of 600 MPa and shear strength of 300 MPa. The diameter of the bolt is 10 mm. Determine the factor of safety. Assume force of F = 25 kN. F+ 60% Figure. 2 F
Tensile and fully reversed loading fatigue tests were conducted for a certain steelalloy and revealed the tensile strength and endurance limit to be 1200 and 550 MPa,respectively. If a rod of this material supply were subjected to a static stress of 600MPa and fully-reversed oscillating stresses whose total range was 700 MPa. Assuming garber relationship will this rod fail by fatigue failure