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.

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter2: Axially Loaded Members

Section: Chapter Questions

Problem 2.5.1P: The rails of a railroad track are welded together at their ends (to form continuous rails and thus...

See similar textbooks

Similar questions

A wine of length L = 4 ft and diameter d = 0.125 in. is stretched by tensile forces P = 600 lb. The wire is made of a copper alloy having a stress-strain relationship that may be described mathematically by =18,0001+30000.03(=ksi) in which is nondimensional and has units of kips per square inch (ksi). (a) Construct a stress-strain diagram for the material. (bj Determine the elongation, of the wire due to the Forces P. (c) IF the forces are removed, what is the permanent set of the bar? (d) If the forces are applied again, what is the proportional limit?
(a) Solve part (a) of the preceding problem if the pressure is 8.5 psi, the diameter is 10 in., the wall thickness is 0,05 in., the modulus of elasticity is 200 psi, and Poisson's ratio is 0.48. (b) If the strain must be limited to 1.01, find the maximum acceptable inflation pressure
A high-strength steel bar used in a large crane has a diameter d = 2.00 in. (sec figure). The steel has a modulus of elasticity E = 29 × 10 psi and Poisson’s ratio is v = 0.29. Because of clearance requirements, the diameter of the bar is limited to 2.001 in. when it is compressed by axial forces. What is the largest compressive load Pmaxthat is permitted?
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
A material with an Ultimate Tensile Strength (UTS) of 400 Mpa is loaded cyclically about mean stress of 80 MPa. If the stress range that will cause fatigue fracture in 100 000 cycles under zero mean stress is (+,- )60 MPa, what stress range (in MPa) about the mean of 70 MPa will give the same life
2. Another cylindrical component is madeof Enfennering ceramic Al203 but with different dimensions. Here, l=30 cm and the diameter is 4 cm. Assume the same Weibull modulus of 9. Calculate the level of the tensile strength for the following probability of failures: a. Pr (V) = 0.1 b. Pr (Vo) = 0.01 c. What is the survival probability and the failure probability of this component if a stress of 200 MPa is applied?
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
2 Estimate the fatigue strength of a rotating-beam made of AISI 1035 CR steel corresponding to a life of 10° cycles of stress reversal. Also, estimate the life of the specimen corresponding to stress amplitude of 60 ksi.
OWHATSAPP now Basel Wbdik tzbat kmnnn Practice Assignment 3- Chapter 6: Problem 1: . Consider a steel alloy having the stress-strain diagram shown in the figure below: 1. Determine the Young's modulus E, the ultimate tensile strength TS, the yield strength YS. 2. Estimate the ductility. 3. If the Poisson's ratio v= 0.35, calculate the shear modulus G. 400 T 100 400 300 200 200 100 100 0.004 0008 0.01 0.02 0.03 0.04 0.05 0.06 Strain Solution: Problem 2: The short cylindrical block of 2014-T6 aluminum, having an original diameter of 0.5 in. and a length of 1.5 in., is placed in the smooth jaws of a vise and squeezed until the axial load applied is 800 Ib. Given young's modulus 10.6x10 psi and ress (MPa)
2. A steel of rotating-beam test specimen has an ultimate strength of 1100Mpa. Estimate the fatigue strength of the specimen corresponding to a life of 150k cycles of stress reversal.
4. The maximum stress a human tendon can withstand is estimated to be 1200 MPa. If you were to test it for rupture what load cell you should use (25ON or 5kN) what problems may occur if you select an incorrect load cell. 5. The figure below is a J-shaped (or concave upward) stress-strain curve. What does a J-shaped stress stain curve indicate about a material's response to stress and tendency to yield? Name two materials that have J-shaped stress strain curves.
yields under a load of 8KN; it attains a max load of 15KN and breaks finally A tensile test is carried out on a bar of mild steel of diameter 20mm. The bar Еxample at a load of 7KN. Estimate yP (i) The tensile stress at the yield point (ii) The ultimate tensile test ii. Max loa (iii) The average stress at the breaking point if the diameter of neck is Omm.