For some glass fiber-epoxy matrix combination, the critical fiber length-fiber diameter ratio is 50.Using the data in Table 16.4, determine the fiber-matrix bond strength. Table 16.4 Characteristics of Several Fiber-Reinforcement MaterialsSpecificModulusMaterialSpecific GravityTensile Strength[GPa (10 psi)]Strength(GPa)of Elasticity[GPa (10 psi)]SpecificModulus(GPa)WhiskersGraphite2.2209.1700318(3)(100)Silicon nitride3.25-71.56-2.2350-380109-118(0.75-1.0)(50-55)Aluminum oxide4.010-202.5-5.0700-1500175-375(1-3)(100-220)Silicon carbide3.2206.25480150(3)(70)FibersAluminum oxide3.951.380.353799696(0.2)(55)Aramid (Kevlar 49)1.443.6-4.12.5-2.8513191(0.525-0.600)(19)Carbon1.78-2.151.5-4.80.70-2.70228-724106-407(0.22-0.70)(32-100)E-glass2.583.451.3472.528.1(0.5)(10.5)Boron2.573.61.40400156(0.52)(60)Silicon carbide3.03.91.30400133(0.57)(60)UHMWPE (Spectra 900)0.972.62.68117121(0.38)(17)Metallic WiresHigh-strength steel7.92.390.3021026.6(0.35)(30)Molybdenum10.22.20.2232431.8(0.32)(47)Tungsten19.32.890.1540721.1(0.42)(59)

Given data, Fiber length to diameter ratio ie. K= L/d= 50

Answered: For some glass fiber-epoxy matrix…

For some glass fiber-epoxy matrix combination, the critical fiber length-fiber diameter ratio is 50. Using the data in Table 16.4, determine the fiber-matrix bond strength.

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

The tensile strength and number-average molecular weight for two poly(methyl methacrylate) materials are as follows: Tensile Strength (MPa) Number-Average Molecular Weight (g/mol) 66 30,000 160 50,000 Estimate the tensile strength (MPa) at a number-average molecular weight of 34,000 g/mol. Express your answer three significant figures. Answer:
Question Seven (Plastics) The data below is from a fibre reinforced plastic. Would this composite be suitable for use at 400°C? Explain your answer. Temperature (°C) 20 100 200 300 400 500 600 Plastic A Plastic B Plastic C Yield Strength (MPa) 270 350 47 Tensile Strength (MPa) 300 500 52 E (GPa) 130 3 14 115 100 95 Question Eight (Plastics) Identify the thermoplastic, the elastomer and the thermoset. 70 58 0 Young's Modulus (GPa) Elongation (%) 12 3 600
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.
Q2/ At constant strain, about 7.6 Mpa of stress is used to a polymer. After 960 h, the stress reduced to 4.8 Mpa at 30 °C. When the same polymer is heated to 50 °C the relaxation time is 1200 h. 1- Estimate the relaxation time at 30 °C? 2- Estimate the stress after 1440 h and 30 °C? 3- Estimate the stress relaxation activation energy using the equation below: !=Cexp ) Where R = 8.314 j/mol. K, and C: constant %3D RT
A composite material consists of 60% glass fibre by volume (V₁ = 0.6). Half of the fibre is in unidirectional (0°) roving form and the other half is continuous fibre (0°, 90°) mat. The matrix is polyester. The properties of the constituent materials are shown in Table 4. Table 4 Density (Mg.m³) Tensile modulus (GPa) Tensile strength (MPa) Fibre 2.6 69 1200 i. Calculate the density of the composite material Matrix 1.1 2 35 ii. Calculate the tensile strength, oc, and the tensile modulus, Ec, of the composite in the 0° and 90° directions using the simple "rule of mixtures" approach.
. An elliptical hair, 10.0 cm long, has the following semi-diameters A = 35\mu , B=25 \mu When the hair was extended from 10.0 cm to 10.1 cm at 50% RH the force on the hair increased by 11.3 grams. What is the modulus of elasticity in GPa, (round off) Group of answer choices 10.0 1.0 8.0 4.0
Q2: A fiberglass composite consists of a matrix of vinyl ester and reinforcing fibers of E-glass. The volume fraction of E-glass is 30%. The density of the vinyl estiser 0.882 g/cm³, and its modulus of elasticity is 3.6 GPa. The density of E-glass is 2.6 g/cm³, and its modulus of elasticity is 76 GPa. A section of composite 1 cm by 25 cm by 2 m is fabricated with the E-glass fibers running longitudinally in the 2000 mm direction. Determine: (a) The masses of vinyl ester and E-glass fibers. (b) The density of the composite. (c) The composite modulus of elasticity in the longitudinal and the perpendicular directions of the glass fibers. (d) If the tensile strength of the glass fibers, is 1 GPA and the tensile strength of the epoxy matrix is 60 MPa, find the tensile strength of the composite in the longitudinal direction.
Question 5: The graph below gives a plot of force versus total sample length in a tensile test of a polymer. The sample is cylindrical, with an initial diameter of 1 cm and an initial length of 10 cm. From the data below, calculate the modulus, yield stress, yield strain, tensile strength, and % elongation. 1200 800 10 12 13 14 15 Lensth (cm) Force (N)
9. A polymer sample with an original length of 10 cm and cross- sectional area of 1 cm² is subjected to a tensile test. The force applied to the sample is recorded at different elongations, and the following data is obtained: Force (N) Elongation (cm) 0 100 200 300 400 500 0 1 2 3 4 5 Using this data, calculate the modulus of the polymer sample in units of Pa.
Sintered silicon nitride parts are expected to experience tensile stresses 50% of the ultimate tensile strength of the material. What will be the maximum allowable size of internal flaws for these parts not to fail in service? Given the following properties of the material: Specific surface energy: 0.3 J/m2 its Youngs Modulus: 304 GPa Ultimate tensile Strength: 570 MPa Select one: a. 1.43 µm b. 0.71 µm c. 15 µm d. 85 µm e. 9.5 µm
electric highline cable contains one cold-drawn steel wire and six annealed aluminum wires, each with a 2 mm diameter (the steel provides the required strength; the aluminum, the conductivity). If the steel and aluminum have elastic modulus values of 205 GPa and 70 GPa, respectively, what is the overall stiffness for the composite cable?
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