Problem 4.5

= 230 *10^9 =4.6 *10^9

= 92*10^9 = 1.769*10^9

=0.25 =0.3

= 0.4

Solution

= 9.476 *10^10

= 7.566 *10^9

= 0.28

= 2.911*10^9

Problem 4.6

= 0.55 so

a) E-glass - Polyster

= 72.345 Gpa = 3.4 Gpa

= 3.45 Gpa = 75.9 Mpa

So

= 4.31*10^10 7.145*10^9

= 01.6425*10^8 0.292

b) S-glass – epoxy (9310)

= 85 Gpa = 3.12 Gpa

= 4.8 Gpa = 75.8 Mpa

So

= 4.8154*10^10 6.6356*10^9

= 1.6525*10^8 0.292

c) Carbon(T300) – Vinyl ester

= 230 Gpa = 3.4 Gpa

= 3.53 Gpa = 82.7 Mpa

So

= 1.2803*10^11 7.421*10^9

= 1.7866*10^9 0.292

Problem 4.11

This could be:

&