Strength of Material Approximations
In general, the laminates made are thin. Hence, for such laminates the analysis done using Kirchhoff and plane stress assumptions is reasonably good. For such analysis, one needs the engineering…
Mass Fractions
Let and be the mass of fibres, matrix and composite, respectively. We know that (7.6) The mass fractions, similar to volume fractions, are defined as the ratio of mass of respective phase…
Volume and Mass Fractions, Density and Void Content
In the present section we are going to introduce some important concept of relative fraction of fibres and matrix by volume and mass. This is very important from the point…
Micromechanics
Strength of Materials Approach Introduction In the earlier lectures we have used the effective properties of the unidirectional layers in the development of various lamina or laminate mechanics issues. However,…
Glass Fibre
· Fibers of glass are produced by extruding molten glass, at a temperature around 1200 through holes in a spinneret with diameter of 1 or 2 mm and then drawing the filaments to…
Boron Fiber
This fibre was first introduced by Talley in 1959 . In commercial production of boron fibres, the method of Chemical Vapour Deposition (CVD) is used. The CVD is a process…
Reinforcements materials and forms
Figure 1.6: Periodic Table showing the materials used in advanced composites (blue blocks) and conventinal metals (yellow blocks) Figure 1.6 shows the periodic table. The conventional metals are shown in…
What are the types of fibres?
The fibres that are used in the fabrication of a composite can be divided into two broad categories as follows: A. Natural fibres and B. Advanced fibres A. Natural fibres The natural fibres are…
Three moduli of elasticity
Depending upon the type of strain in the body there are three different types of modulus of elasticity. They are (i) Young's modulus (ii) Bulk modulus (iii) Rigidity modulus Three…
hygro-thermal Effects on Laminate
When thermal as well as hygral strains are present in total strain, then (5.128) The resultant in-plane forces are given as (5.129) and the resultant moments are given as (5.130)…
