Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Chapter 12.15, Problem 43AAP
To determine
The tensile modulus of elasticity of the unidirectional carbon fiber reinforced composite material.
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Chapter 12 Solutions
Foundations of Materials Science and Engineering
Ch. 12.15 - Define a composite material with respect to a...Ch. 12.15 - Prob. 2KCPCh. 12.15 - What are some of the advantages of glass...Ch. 12.15 - Prob. 4KCPCh. 12.15 - Prob. 5KCPCh. 12.15 - What properties make carbon fibers important for...Ch. 12.15 - Prob. 7KCPCh. 12.15 - Prob. 8KCPCh. 12.15 - Prob. 9KCPCh. 12.15 - Prob. 10KCP
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- Boron coated with SiC reinforced aluminium containing 40 vol.% fibers is animportant high temperature, light weight composite material. Estimate the density,modulus of elasticity and tensile strength of composite parallel to the fiber axis. Alsoestimate the modulus of elasticity of composite perpendicular to the fibres.arrow_forwardUsing the ‘rule of mixtures’ calculate the modulus and strength, in the fiber direction and perpendicular to the fiber direction, of a glass fiber-epoxy composite plate, given that the weight fraction of glass fiber is 40%. The modulus of the glass fiber is 60 GPa, and the modulus of the epoxy is 3 GPa. The density of glass fiber is 2300 kg/m^3 and the density of epoxy is 1300 kg/m^3. Calculate the tensile strength of the composite using rule of mixtures in the fiber direction given that the tensile strength of the glass fiber is 1 GPa and the epoxy is 70 GPa.arrow_forwardIn comparison with a brittle polymer, a ductile polymer yields and then breaks at a higher stress and strain The elongation at break reduces as the temperature of the sample is reduced The stress-strain curve for vulcanized elastomers has a greater slope than unvulcanized polymers throughout The elongation at break is greater for elastomers than tough, hard thermoplasticsarrow_forward
- Calculate the density of a composite made with 35% Kevlar-49 fibers in an epoxy resin (ρ = 1.1 kg/m3, E = 2.5 GPa). For Kevlar-49, Ef = 131 GPa; density = 1440 kg/m3arrow_forwardAn epoxy matrix is reinforced with 40 vol% E-glass fibers to produce a 2-cm diametercomposite that is to withstand a load of 25,000 N. Calculate the stress acting oneach fiber.arrow_forwardQuestion 1 A composite material consists of 40% parallel carbon fibres with a Young’s modulus of 405 GPa in a matrix of epoxy resin with a Young’s modulus of 2.5 GPa. Calculate the Young’s modulus of the composite in the parallel and in the perpendicular directions of the fibres. Use the graphical method seen in class to show the possible value of the overall young modulus of your composite material.arrow_forward
- Describe the difference in mechanical properties as a function of temperature between a highly crystalline thermoplastic and an amorphous thermoplastic.arrow_forwardAlice is conducting a tensile test on continuous fiber alignment compositesamples. She found that the results are different in the longitudinal andtransverse directions of the samples. Explain why this happens with the aid ofdiagram.arrow_forwardOriginal question: The nominal engineering constants of a unidirectional graphite epoxy ply are given in Table below for a fiber volume fraction of 60 percent. The fiber volume is reduced to 55 percent. Estimate the engineering constants for this reduced fiber volume fraction. New question needing to be answered: Repeat with a reduced fiber volume fraction of 40 percent representative of lower fiber volume fraction materials. Table:arrow_forward
- A tensile load of 120N is applied to an aluminum boron composite with 1mm^2 cross sectional area.the volume of parallel fibers is 20%.what is the stress in the fibers when the load Axis is (a)parallel to the fibers (b)perpendicular to the fibersarrow_forwardDraw the structure of the idealized modulus-temperature for thermoplastic and thermosetscurveand mention all the transitions.arrow_forwardWhen answering the following questions , ensure that you explain in terms of both the microscopic and macroscopic structure of the materials. A) polymer - explain the difference in structure between a thermoplastic and thermoset material and explain how the structure accounts for the key generic properties of those polymers. B) composite material - for a particular composite and a fibre reinforce composite , explain the difference in structure and whst structual features dictate the properties of the material.arrow_forward
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