Examples:
Table 7.1: Mechanical and thermal properties of fibres [5]
Property/Fibre |
AS4 |
T300 |
E-Glass 21xK43 Gevetex |
Silenka E-Glass 1200tex |
 GPa
|
225 |
230 |
80 |
74 |
 GPa
|
15 |
15 |
80 |
74 |
 GPa
|
15 |
15 |
33.33 |
30.8 |
G23 GPa |
7 |
7 |
33.33 |
30.8 |
|
0.2 |
0.2 |
0.2 |
0.2 |
|
-0.5 |
-0.7 |
4.9 |
4.9 |
|
15 |
12 |
4.9 |
4.9 |
Table 7.2: Mechanical and thermal properties of matrix [5]
Property/Matrix |
3501-6 epoxy |
BSL914C epoxy |
LY556/HT907/DY063 epoxy |
MY750/HY917/DY063 epoxy |
 GPa
|
4.2 |
4.0 |
3.35 |
3.35 |
 GPa
|
1.567 |
1.481 |
1.24 |
1.24 |
|
0.34 |
0.35 |
0.35 |
0.35 |
|
45 |
55 |
58 |
58 |
Example 7.1: For AS4/3501-6 Epoxy with 0.6 fibre volume fraction calculate all mechanical and thermal properties using strength of materials approach of composite.
Solution:
Effective axial modulus:
Effective transverse modulus without deformation constraint satisfied
Effective transverse modulus with deformation constraint satisfied
where,
Putting these values, we get
Effective axial shear modulus
Effective axial coefficient of thermal expansion with deformation constraint satisfied
Effective transverse coefficient of thermal expansion without deformation constraint satisfied
Effective transverse coefficient of thermal expansion with deformation constraint satisfied
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