can you help me answer this question and explain the steps you took to get to the answer i am stuck between B and D as the answer TS5An old composite product of a company is comprised of 40 vol% fibre with the Young'smodulus (E = 110 GPa) in a matrix with the Young's modulus (Em = 40 GPa). Recentinspection has identified deficiencies in this product that require replacement of this material.Which of the following statement is false regarding the replacement if the Young's modulusof the new composite parallel to the fibre direction should not be lower than the old product?Note that: E₁ = VE₁ + (1-V₂) Em(A)Using the same matrix (Em = 40 GPa), and 35 vol% of a different type of fibre (E= 120 GPa) can satisfy the requirement.(B)Composite consisting of 25 vol% of fibre with the Young's modulus (E-130 GPa),and the matrix with the Young's modulus (Em = 30 GPa) is a good candidate.Keeping the same type of fibre (E = 110 GPa), but with 50 vol% in a differentmatrix (Em = 35 GPa) can be considered.(C)(D)It is not recommended to use 20 vol% fibres with the Young's modulus (Ef = 140GPa) in a matrix with the Young's modulus (Em = 30 GPa).(E)It is acceptable to use the same 40 vol% of fibres but with a different Young'smodulus (Ex= 120 GPa) in a matrix with the Young's modulus (Em = 35 GPa).

An old composite product of a company is comprised of 40 vol% fibre with the Young's modulus (E = 110 GPa) in a matrix with the Young's modulus (E = 40 GPa). Recent inspection has identified deficiencies in this product that require replacement of this material. Which of the following statement is false regarding the replacement if the Young's modulus of the new composite parallel to the fibre direction should not be lower than the old product? Note that: E₂ = V₁E₁ + (1-V₂) Em (A) Using the same matrix (E = 40 GPa), and 35 vol% of a different type of fibre (Ef = 120 GPa) can satisfy the requirement. (B) Composite consisting of 25 vol% of fibre with the Young's modulus (E-130 GPa), and the matrix with the Young's modulus (E_ = 30 GPa) is a good candidate. Keeping the same type of fibre (E = 110 GPa), but with 50 vol% in a different matrix (E = 35 GPa) can be considered. (C) (D) It is not recommended to use 20 vol% fibres with the Young's modulus (E;= 140 GPa) in a matrix with the Young's modulus (E = 30 GPa). (E) It is acceptable to use the same 40 vol% of fibres but with a different Young's modulus (E;= 120 GPa) in a matrix with the Young's modulus (E_ = 35 GPa).

An old composite product of a company is comprised of 40 vol% fibre with the Young's modulus (E = 110 GPa) in a matrix with the Young's modulus (E = 40 GPa). Recent inspection has identified deficiencies in this product that require replacement of this material. Which of the following statement is false regarding the replacement if the Young's modulus of the new composite parallel to the fibre direction should not be lower than the old product? Note that: E₂ = V₁E₁ + (1-V₂) Em (A) Using the same matrix (E = 40 GPa), and 35 vol% of a different type of fibre (Ef = 120 GPa) can satisfy the requirement. (B) Composite consisting of 25 vol% of fibre with the Young's modulus (E-130 GPa), and the matrix with the Young's modulus (E_ = 30 GPa) is a good candidate. Keeping the same type of fibre (E = 110 GPa), but with 50 vol% in a different matrix (E = 35 GPa) can be considered. (C) (D) It is not recommended to use 20 vol% fibres with the Young's modulus (E;= 140 GPa) in a matrix with the Young's modulus (E = 30 GPa). (E) It is acceptable to use the same 40 vol% of fibres but with a different Young's modulus (E;= 120 GPa) in a matrix with the Young's modulus (E_ = 35 GPa).

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Problem 1.1MA

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Concept explainers

Processing of Polymer Matrix Composites

The polymer matrix composite is described as a composite material that contains some polymer in the form of either fibers or powder. Polymer matrix composites are also known in short as PMC's.

Question

can you help me answer this question and explain the steps you took to get to the answer i am stuck between B and D as the answer

TS5
An old composite product of a company is comprised of 40 vol% fibre with the Young's
modulus (E = 110 GPa) in a matrix with the Young's modulus (Em = 40 GPa). Recent
inspection has identified deficiencies in this product that require replacement of this material.
Which of the following statement is false regarding the replacement if the Young's modulus
of the new composite parallel to the fibre direction should not be lower than the old product?
Note that: E₁ = VE₁ + (1-V₂) Em
(A)
Using the same matrix (Em = 40 GPa), and 35 vol% of a different type of fibre (E
= 120 GPa) can satisfy the requirement.
(B)
Composite consisting of 25 vol% of fibre with the Young's modulus (E-130 GPa),
and the matrix with the Young's modulus (Em = 30 GPa) is a good candidate.
Keeping the same type of fibre (E = 110 GPa), but with 50 vol% in a different
matrix (Em = 35 GPa) can be considered.
(C)
(D)
It is not recommended to use 20 vol% fibres with the Young's modulus (Ef = 140
GPa) in a matrix with the Young's modulus (Em = 30 GPa).
(E)
It is acceptable to use the same 40 vol% of fibres but with a different Young's
modulus (Ex= 120 GPa) in a matrix with the Young's modulus (Em = 35 GPa).

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