10:52 AM50SALENoll 2.0376K/SDownloaded by Mothusi Mahlathini (mothusimothusi194@gmail.com)SECTION AQuestion 1(a)(b)(i) List and briefly explain the four components of the discipline ofmaterials science and engineering in a linear relationship.[4](ii) Using a flowchart, classify engineering materials, indicating thetypes of polymers.[5]The ionic radii and coordination number of NaCl is 0.414 -0.732 and6 respectively. Using the data below, show that FeO has the structure ofNaCl.[8](c)IonIonic radius(cation/anion)(nm)Al3+0.053Fe3+0.06902-0.140CI-0.181F-0.133Fe2+0.077Determine the Miller indices for the directions in the cubic unit cellshown below (Fig. Q1):[8]Figure Q1Downloaded by Mothusi Mahlathini (mothusimothusi194@gmail.com)Question 2(a)(b)T(i) List and briefly explain the six properties of solid materials. [6](ii) Using a flowchart, classify metals and alloys.[6]BCC lithium has a lattice parameter of 3.5089 x 10-10 m and contains2002TEditAnnotateFill & Sign ConvertAllOS

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Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter2: Measurement, Materials, And Safety

Section2.1: Introduction To Safety

Problem 12RQ

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d) A number of [0]s and [0,90]s CFRP test specimens were made from prepreg material with the following properties: Fibre strength, of = 3250 MPa Fibre modulus, E₁ = 195 GPa Matrix strength, m = 35 MPa Matrix modulus, Em = 3.8 GPa Volume fraction of fibres, Vf = 0.65 Calculate the tensile strength, oc, and the tensile modulus, Ec, in the 0° and 90° directions, using the simple "rule of mixtures" approach for both the [0]s and [0,90]s specimens.
Compression molding is a manufacturing process in which the molding material is preheated then placed in an open mold cavity where the compressive action of the punch forces the polymer into the desired shape as shown in the figure below. Based on your understanding of the behavior of polymers, which of the statements below regarding compression molding of polymers are accurate? Punch Cavity C. -Upper mold half Charge 41 (1) -Lower mold half Knock-out pin V, F |x.F (2) and (3) Molded part a. Lower operating temperatures are more desirable as they reduce viscosity making it easier to fill the cavity b. This process can only be used for thermosets as they can thermally cure from monomer state This process can be used for both thermosets and thermoplastics as they can both be thermally shaped d. This process is suitable for rubber, PVC and polymethyl methacrylate
A polymer has creep behaviour that can be represented as a power law equation: e = 0 (Jo + Jit") where J, is 0.5 GPa1, J1 is 0.45 GPa's 0.3 and n is 0.3 (with t in seconds). A component of this material has the following applied stress history: There is no stress before t = 0 A positive (tensile) stress of 8 MPa is applied from t = 0 for 4 hours From t = 4 hours to 6 hours, the stress is compressive stress of 2 MPa The stress is then removed. What will the strain in the material be at t = 9 hours? Enter your value as a number to 4 decimal places. You have a 2% error margin with this.
Design and manufacture of plastic and composite parts The tank shown in Figure 1 is stacked as follows: Couches individuelles: verre = glass 1 - Unidirectionnel verre/epoxy, V₁ = 62%, h = 0.010 po. 2- Mat verre/epoxy, V₁ = 40%, h = 0.040 po. Extérieur 4 Empilement: [0/35/-35/90] 3 2 3 1 Intérieur Unidirectionnel kevlar-epoxy, V₁ = 55%, h = 0.010 po. 4- Tissus 50/50, Kevlar/epoxy, 230 g/m2, V₁ = 50% h = épaisseur du PLI V₁ = Pourcentage volumique de fibres As well as the following load and dimensions: P = 3 MPa r = 50 mm L = 625 mm h = 600 mm F = 500 N N h р B x F Figure 1. multilayer composite pipe under pressure (p), also subject to torsional moment and bending moment due to force F and lever arms h and L. page 1
Q1: You are designing a high-pressure oxygen cylinder for hospitals fighting against COVID. The material used is layered unidirectional continuous fiber reinforced composite, as schematically shown in Fig.1 (a). In the 0° layer, the fiber is along the Y direction, and the fiber is along X direction in the 90° layer. The thickness of the 90° layer is 1.5 times of that of the 0° layer. The matrix material is an isotropic material with the Young's modulus E-10 GPa and volume fraction Vm-20%, while the continuous fiber is an anisotropic material with the Young's modulus E₁-250 GPa along the length direction, E2-20 GPa along the transverse direction and volume fraction V₁-80% a) Based on rule of mixture and mechanics of material method, calculate the effective Young's modulus along each direction (Ex, Ey, E₂). b) The as-produced (unloaded) inner radius Ro-0.1 m, the wall thickness H=0.005 m (<
I need assistance designing three structural models on Fusion 360 (bamboo-inspired, bone-inspired, and a control cylinder) for a mechanics project. These models will be tested under compression to compare their load-bearing capacity, energy absorption, and failure modes. Here are the specific details and requirements for each design: General Requirements: External Dimensions: All models must have the same outer dimensions: height = 15 cm, diameter = 5 cm. Material Volume: Ensure each design uses approximately the same material volume (e.g., relative density = 30% of the total volume). If you have any other ideas on how to ensure the test is fair between all 3 samples please note it! File Format: Provide the designs as STL files compatible with 3D printing or a step-by-step process. Design Specifications: 1. Control Cylinder: A simple hollow cylinder with: Wall Thickness: 2 mm. Inner Diameter: 4.6 cm (to maintain the outer diameter and wall thickness). No additional…
(6) There are many kinds of polyethylene foam, each with different properties. The low density polyethylene foams (as seen in this video) are very flexible. Remember: in solid mechanics, "flexible" just means that in comparison to other materials, the material deforms quite a bit, relative to the stress. For torsion, the material property that relates to stiffness is the shear modulus (or modulus of rigidity), G. We'll say that G = 6 MPa. a) Complete the FBD. b) Compute the shear stress at Point B. c) Illustrate it on a stress element. d) Report the shear strain at B (in radians). e) Compute the rotation of the top plane. f) Compute arc length s. FBD: I T=2 kN-m POINT B 18 300mm 1m

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Precision Machining Technology (MindTap Course Li…

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