Design Wind Power Turbine - Hybrid Anisotropic Materials for Wind Power Turbine Blades - page 45

The. interlaminar. shear. stresses. for. the. skin. turbine. blade. can. be. found.
using.Equation.(2.42).and.Equation.(2.47).

2 β + α .

Y m =

. (2.43)

3

Obviously. the. height. of. the. contour. would. be. one-third. the. length. from.
the.entrance.edge.(see.Figure 2.21).

4 1/2

.

e =

∗ 3 1 / α β

( - )[k/ (( λ α β - )]

(2.44)

.

k

3

Therefore,.the.stress.function.F.includes.the.equation.of.aviation.symmet-
rical.proiles.as.expressed.in.Equation.(2.29).
After.simpliication,.the.stress.function.F.from.Equation.(2.29).can.be.given.
as:

F(x,y) = Q
8I

1
3

2 2

.

λ λ

[ x - k(y - α (y - )[y + β

a (b - 1 + 4q)] .

(2.45)

We.have.determined.the.derivations.of.the.stress.function.F:

dF

dy = - Q

1
3a

( y + ( b - 1 + 4 q )

4I

dF

dy = Q

1
3a (b - 1 + 4q)] - k(y -

1
3a (b - 1 + 4q)] - k

{- 2k(y - α )(y - )[y + β α ) (y +

2

. ..

81 λ

.

(y - α ) (y - ) + x )

2

β λ

2

. . (2.46)

.

= Q
81

1
3a (b -

1
3a (b - 1 + 4q)]

′

2

τ { - 2k(y - α )(y - )[y + β 1 + 4q)] - k(y - α ) (y + - k

xz

λ

2 2

(y - α ) (y - ) + x ) β λ

.

. .

= - Q
4I

1
3a

τ ′ ( + y ( b - 1 + 4 q )

xz

. . (2.47)