Does the hardness of your sample fall within the expected range?

Q4/ A. Explain why ceramic materials do not response to the plastic deformation processes? Also clarify why flexural test is applied to ceramics instead of tensile test? B. Estimate whether a cylindrical aluminum oxide sample will fail or not when it subject to flexural test to achieve flexural strength of 390 MPa knowing that the sample radius is 2.5 mm, separation distance is 30 mm, and the applied load is 620 N respectively.

The maximum measured Young’s modulus for a carbon nanotube is 950 GPa.  How much stress would have to be applied to this nanotube to have the same strain as in the steel sample?

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

Why does quartz have many different shades and color?

A ceramic sample with a rectangular section can support a load of up to 290 N under a common strength test for ceramics. Its flexural strength is then 78.3 MPa and the distance between support points is 45 mm. What would be the dimensions of this sample if its width were twice its height?

In Triaxial test, which of the following parameters do not need to be recorded  the confining pressure   specimen diameter changes   the generated pore pressure   the axial force

A brass alloy rod having a cross sectional area of 0.24 in.2and a modulus of 16 * 106 psi is subjected to a tensile load. Plastic deformation was observed to begin at a load of 8,944 lb.a. Determine the maximum stress that can be applied without plastic deformation.b. If the maximum length to which a specimen may be stretched without causing plastic deformation is 3.28 in., what is the original specimen length?

I could use help relating engineering strain and cold work algebraically.