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a análise de placas laminadas compostas inteligentes

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7.3 Equações constitutivas do laminado piezelétrico 131<br />

Q2y<br />

=<br />

+<br />

Q2x<br />

<br />

=<br />

N<br />

k=1<br />

Dc44 Dc45<br />

npiez <br />

k=1<br />

Lx<br />

<br />

<br />

<br />

<br />

<br />

−<br />

Ly<br />

Dc45 Dc55<br />

e14 e24<br />

e15 e25<br />

(k)<br />

=<br />

χ11 χ12<br />

= − hk<br />

2<br />

χ12 χ22<br />

zk<br />

zk<br />

zk−1<br />

⎧⎪ ⎨<br />

⎪⎩<br />

(k)<br />

zk−1<br />

e14 e15<br />

e24 e25<br />

⎛<br />

⎝<br />

⎛<br />

⎝<br />

<br />

<br />

<br />

<br />

<br />

+<br />

C44 C45<br />

C45 C55<br />

e14 e24<br />

e15 e25<br />

ψy + ∂w0<br />

∂y<br />

ψx + ∂w0<br />

∂x<br />

1<br />

hk<br />

(k) γ 0 yz + z 2 κ2yz<br />

(k) zk − z<br />

γ 0 xz + z 2 κ2xz<br />

kk<br />

Epx<br />

Epy<br />

<br />

⎞<br />

⎠ z 2 dz<br />

⎫<br />

⎪⎬<br />

<br />

F c44 F c45 3ψ3y<br />

+<br />

⎪⎭ F c45 F c55 3ψ3x<br />

4 zk 12 − zkz3 k−1<br />

3 + z4 k−1<br />

4<br />

e14 e24<br />

(k) zk − z<br />

(k)<br />

e15 e25<br />

hk<br />

⎧<br />

⎪⎨<br />

⎪⎩<br />

Epx<br />

⎧<br />

⎪⎨<br />

⎪⎩<br />

(k) γ 0 yz + z 2 κ2yz<br />

Epy<br />

ψy + ∂w0<br />

∂y<br />

ψx + ∂w0<br />

∂x<br />

γ 0 xz + z 2 κ2xz<br />

hk<br />

∂ϕk−1<br />

∂x<br />

∂ϕk−1<br />

∂y<br />

<br />

⎞ <br />

⎠<br />

z − zk<br />

dz<br />

⎫<br />

⎪⎬<br />

⎪⎭<br />

− 1<br />

4 zk hk 12 − zkz3 k−1<br />

3 + z4 <br />

k−1<br />

4<br />

e14 e15<br />

e24 e25<br />

(k) 3ψ3y<br />

+ 1<br />

h2 3 zk k 3 + zkz 2 k−1 − z 2 kzk−1 − z3 <br />

k−1<br />

3<br />

χ11 χ12<br />

χ12 χ22<br />

3ψ3x<br />

(k)<br />

<br />

⎧<br />

⎪⎨<br />

⎪⎩<br />

⎫<br />

⎪⎬<br />

⎪⎭<br />

(k)<br />

∂ϕk−1<br />

∂x<br />

∂ϕk−1<br />

∂y<br />

⎫<br />

⎪⎬<br />

⎪⎭<br />

(7.63)<br />

(7.64)

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