1.58. A thin-walled cylindrical pressure vessel of 0.3-m radius and 6-mm wall thick- ness has a welded spiral seam at an angle of o 30° with the axial direction (Fig. P1.5). The vessel is subjected to an internal gage pressure of p Pa and an axial compressive load of P 9n kN applied through rigid end plates. Find the allowable value of p if the normal and shearing stresses acting simultane- ously in the plane of welding are limited to 21 and 7 MPa, respectively. FIGURE P1.5.

How do heat treatment techniques like quenching and tempering contribute to enhancing the mechanical properties of materials in the field of mechanical engineering?

In an engineering application, the material is a strip of iron with a fixed crystallographic structure subject to a tensile load during operation. The part failed (yielded) during operation and needs to be replaced with a component with better properties. You are told that two other iron strips had failed at yield stresses of 110 and 120 MPa, with grain sizes of 30 microns and 25 microns respectively. The current strip has a grain size of 20 microns. The diameter of the rod is 1 mm and the load applied is 100 N. What is the yield stress of the new part C and would you recommend it for operation? Select one: a. O b. 129.5, yes C. 133.5 MPa, yes e. 120.5 MPa, no d. 140.5, no 123.5 MPa, yes

When a tensile force is applied to a material, the maximum stress that material can take before it is broken is 15 MPa. The same material’s modulus of elasticity is 4000 GPa a) If the original diameter of the material is 2cm, calculate the maximum load that the material can hold. b) If the initial length of the specimen is 15 cm, calculate the maximum length of the material before it is broken.

Given the stress plot, how do you make strain plots for each of the models/materials given (Maxwell and Kelvin-Voigt)?

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