Which of these cast iron would allow the greatest amount of plastic deformation before fracture. O Nodular cast iron Grey cast iron White cast iron O None of them can be worked. If the diameter of steel specimen stretched by tension load is doubled, then it's tensile strength will be Halved Remain unaffected Doubled Become four times

Which of these cast iron would allow the greatest amount of plastic deformation before fracture. O Nodular cast iron Grey cast iron White cast iron O None of them can be worked. If the diameter of steel specimen stretched by tension load is doubled, then it's tensile strength will be Halved Remain unaffected Doubled Become four times

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 3-cm-diameter penny-shaped slag inclusion is foundon the fracture surface of a very large component made of steelalloyed with Ni, Mo, and V. Could this defect have beenresponsible for the fracture if the stress acting on the component was 350MPa? The only material data available areCharpy results in the transition temperature regime whereimpact energy values of 7–10 ft-lb were reported. Be careful ofunits when you consult the KIC–CVN conversions.
A polycrystalline metal has a plastic stress--strain curve that obeys Hollomon’s equation,σ = K εnDetermine n, knowing that the flow stresses of this material at 2% and 10%plastic deformation (offset) are equal to 175 and 185 MPa, respectively.
An 8-cm-square bar of steel is found to contain a1-mm corner crack, oriented perpendicular to the length ofthe bar. If an axial stress is applied from 0 to 420 MPa at afrequency of once every 10 minutes, how long will it take forthe rod to fracture? The properties of the bar are:KIC = 90 MPa √m , σys = 1500 MPa, and the crack growthrelation is da/dN = 2 x 10-37 ΔK4, with da/dN and ΔKbeing given in units of m/cycle and Pa √m , respectively
From the work of D. C. Jillson, Trans. AIME 188, 1129 (1950), the following data were taken relating to the deformation of zinc single crystals. The crystals have a normal cross-sectional area of 122 x 10-6 m2. ϕ = angle between loading axis and normal to slip plane λ = angle between loading axis and slip direction F = force acting on crystal when yielding begins a. Identify the slip system for this material. b. Calculate the resolved shear τRSS and normal σn stresses acting onthe slip plane when yielding begins. c. From your calculations, does τRSS or σn control yielding? d. Plot the Schmid factor versus the normal stress P/ A0 acting on the rod. At what Schmid factor value are these experimentally-measured yield loads at a minimum? Does this make sense?
How can we apply the equations for plane-stress transformation, using a graphical procedure?
What is G-P zone? Draw yield stress vs. aging time, use a simple sketch andexplain the mechanism. Why does yield stress change by aging time ?
A mild steel specimen subjected to Brinell hardness test, if the indenter diameterand surface area of indentation are 19 mm & 39 mm2respectively. Determine theindentation diameter, D1 obtained after the test. Also, determine the forcedapplied on the mild steel specimen in N, if Brinell hardness value is 1629
A component for an airerafl is made from an alyminum alloy that has a plane strain fracture toughness of 40 MPa mba. It has been determined thatfracture results at a stress of 365 MPa when the masimum internal crack length is 2.6 mm. For this component and alloy. compuie the stress leyel atwhich facture will occur for a crrical jnternal crack length of 4.0 mm
It is necessary to select a ceramic material to be stressed using a three-point loading scheme asshown in the figure. The specimen must have a circular cross section, a radius of 3.8 mm, andmust not experience fracture or a deflection of more than 0.021 mm at its center when a load of445 N is applied. If the distance between support points is 50.8 mm, which of the materials in theaccompanying Table are candidates? The magnitude of the center point deflection may becomputed using the equation:Δy =FL3/(48 EI)where E is the modulus of elasticity, and I is the cross-sectional moment of inertia.
A 2-cm-long through thickness crack is discovered in a steel plate. If the plate experiences a stress of 50 MPa that is repeated at a frequency of 30 cpm, how long would it take to grow a crack, corresponding to the design limit where Klimit = KIC/3? Assume that KIC = 90 MPa √m and the material possesses a growth rate relation where da/dN = 4 x 10-37 ΔK4, with da/dN and ΔK being given in units of m/cycle and Pa √m , respectively
There’s a bridge with a span of 1275 m long at its coldest. The bridge is exposed to temperatures ranging from –15ºC to 40ºC. What is its change in length between these temperatures? Assume that the bridge is made entirely of steel. Coefficient of linear expansion, α, for steel is 12 × 10– 6 / ºC
A 30 ?? square plate is subjected to uniform pressure as shown in Figure.1. The 2D loading stressesare described. If the modulus of elasticity is 200 ??? and the lateral constant (Poisson's ratio ? = 0.3). Estimatethe change in length in the vertical, horizontal and diagonal sides as well as determine the volumetric strain.Illustrate the effect of two-dimensionalstrain by constructing appropriate sketches (before and after deformation).Repeat the analysis for lower value of pressure and higher value in the range of [20 -100 MPa] and comment onthe overall results.