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19 Composite materials are
(a) made mainly to improve temperature resistance
() used for improved optical properties
(c) made with strong fibres embedded in weaker and softer matrix to obtain strength better
than strength of matrix
(d) made with strong fibres embedded in weaker and softer matrix to obtain strength better
than strength of both matrix and filler​


Sagot :

Answer:

Option D

Explanation:

A composite material is made up of two material which have different properties (chemically or physically). The two materials are mixed in such a way that it improves the properties of both the materials (the one  in the matrix and the other in the filler) thereby enhancing the overall strength and stiffness of the matrix.

Hence, option D is correct

A correct option is an option (c)

Composite materials:

The main advantage of the composite is there higher strength as compared to the matrix.

The strength is very low as compared to the resultant composite and the fiber.

The resultant strength can be calculated in two direction

The longitudinal way is,

[tex]E=V_mE_m+V_fE_f...(1)[/tex]

The transversal way is,

[tex]\frac{1}{E}=\frac{V_m}{E_m}+\frac{V_f}{E_f} ...(2)[/tex]

From equations (1) and (2) we get,

[tex]E_m < E < E_f[/tex]

So, mode with strong fibers embedded in a weaker and softer matrix to obtain strength better than the strength of the matrix.

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