Which of the following is false regarding factor of safety in the design of structures? a. It considers uncertainties in the material properties. b. A higher factor of safety is preferable in designing safe structures c. It should not be less than 1 to ensure the structure’s safety. d. It considers changes in the loading pattern on the structure. Consider a 1,000-mm long, 25-mm diameter sample subjected to a tension test. Automatic high-precision gages recorded that for an applied load of 150 kN, the sample experienced a longitudinal strain of 2×10−3mm/mm. Assuming that the material remained elastic while loaded, determine its modulus of elasticity. A. 175.0 GPa B. 63.7 GPa C. 152.8 GPa D. 72.9 GPa

Which of the following is false regarding factor of safety in the design of structures? a. It considers uncertainties in the material properties. b. A higher factor of safety is preferable in designing safe structures c. It should not be less than 1 to ensure the structure’s safety. d. It considers changes in the loading pattern on the structure. Consider a 1,000-mm long, 25-mm diameter sample subjected to a tension test. Automatic high-precision gages recorded that for an applied load of 150 kN, the sample experienced a longitudinal strain of 2×10−3mm/mm. Assuming that the material remained elastic while loaded, determine its modulus of elasticity. A. 175.0 GPa B. 63.7 GPa C. 152.8 GPa D. 72.9 GPa

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter6: Introduction To Mechanical Properties

Section: Chapter Questions

Problem 6.9P

See similar textbooks

Similar questions

Q.1 The yield stresses (oy) have been measured using steel and aluminum specimens of various grain sizes, as follows: Material D (µm) σΥ (MPa) Steel 60.5 160 136 128 Aluminum 11.1 235 100 223 (a) Determine the coefficients o and kỵ in the Hall- Petch for these two materials. (b) Determine the yield stress in each material for a grain size of d=26 um.
The thin square plate shown is uniformly deformed such that E - +1425 µE, E, - -668 uE, and ygy - +1125 prad. Determine the normal strain &, in the plate. 60 mm O -255 uE O -233 uE O -202 uE Ο -220 με O -184 uE
A structural component in a fighter jet aircraft has a cellular cross-section (Fig. Q1). The component is 2 m long and is fabricated from an Al alloy, whose modulus of rigidity is 30 GPa. During a certain maneuver of the aircraft, a torque of 40 Nm is applied to the component. Using the Membrane Analogy Method, calculate: (a) the torsional shear stress in each cell of the cross-section; and (b) the angle of twist of the component, giving your answer in degrees. 2mm 75 15m 600mm FIG. Q1
A metallic specimen is subjected to a bending moment Mand an axial load F, as shown in the figure below. It is assumed that the measurement is conducted in an environment of constant temperature, that is, the thermal strain is negligibly small. The bending and axial strain on the upper surface are denoted using e, and e,, respectively. F M M Design I Design II (Two identical sets of graphs for affixing strain gages to the specimen by each design) You are asked to come up with two different designs in order to sense the bending strain only. In each design, you are allowed to use only two strain gages. In each design, you need to do the following: i) Showing on the graph how the strain gages are affixed to the specimen; ii) Writing down the expressions of measured strains by each iii) Illustrating how the gages shall be connected to a bridge circuit; iv) Presenting the output expression3; v) Calculating the bridge constant; vi) Drawing conclusions on which design is more preferable.…
Why buffer solution is used in the determination of Hardness experiment
Creep exercises You are involved in a design for high temperature alloys and have performed a rupture test of material A and B. After data analysis, you noticed that the master curve (o vs LMP) of both material A and B coincide as shown in the diagram below. Based on the rupture strength o (MPa) AtB LMP = T(C+ Int) Which material will you select if they both have same constant (CA= CB)? Which material will you select if C < C? Motivate your answer by means of a calculation.
A gold-alloy microbeam attached to a silicon wafer behaves like a cantilever beam subjected to a uniform load (see figure). The beam has a length L = 24.5 um and rectangular cross section of a width b = 4.0 pm and thickness t = 0.88 um. The total load on the beam is 14.9 µN. If the deflection at the end of the beam is 1.53 um, what is the modulus of elasticity E, of the gold alloy (in GPa)? (Use the formulas of this example. The beam has constant flexural rigidity EI.) GPa
Please briefly explain the Mohr-Coulomb Failure Criterion
3. Consider iron and its elastic constants (Find them from the net or some book). An iron specimen consists of grains with texturing distribution of [110] (20%), [112] (20%), [111] (30%) and [103] (30%) (all percentages by volume) along the loading direction is serving under a static force of 10,000 N. The metal rod has a 20 mm diameter perpendicular to the loading direction. a) Find the strain response of the specimen.
An element has a tensile stress of 600 N/mm2 and a compressive stress of 400 N/mm2 acting on two mutually perpendicular planes and two equal shear stresses of 100 N/mm2 on these planes as shown in figure. (by Mohr's circle аpproach) 400N/mm 100N/mm 600N/mm 600N/mm? 100N/mm 400N/mm (a) Find the principal stresses and maximum shear stress.
difference between 1st principal stress, 2nd principal stress, and 3rd principal stress in mechaninical engineering
A student wants to measure the strain at a particular point K on a loaded specimen, so she affixes a 45° strain rosette at point K and obtains the following results: €A = 390 μrad EB = 275 μrad Ec = 325 prad After packing up and going home to analyse her results, she realises that the strain rosette was misaligned by 0 degrees CW (where a negative corresponds to CCW) from the x-y axes-ie. Gauge C is not parallel with the x-axis and is instead parallel with a different x' axis that is rotated by 0 degrees-where: 0 = 16 deg Instead of replacing the rosette and retaking measurements, the student realises she can use what she learned in ENGG2400 to find the strains she's interested in. b 45° 45° a) Draw a diagram of the situation, showing both the x-y axes and the strain rosette. b) Calculate Exx, Eyy and Yxy. c) Calculate the maximum in-plane shear strain and the associated average normal strain. I X