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Lat. Am. j. solids struct. vol.12 número3

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#

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% ;/0< #

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#

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ξ β β ξ

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(8)

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=

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( )

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;64< = = !

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φ ξ φ ξ

ξ ξ     = +       E   =   

φ ξ φ ξ φ ξ

ξ ξ ξ

φ ξ φ ξ

(9)

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;:1<

' + D

! #

!

φ ξ φ ξ

φ ξ φ ξ

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=

⋅ =

⋅ ⋅ ;:3<

& ! !

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ξ ξ

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=

(10)

"

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α α

∂ ∂

= = =

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∂ ∂

;:5<

( #

β β

αβ α α

φ ξ φ ξ φ ξ φ ξ

φ ξ φ ξ

δ

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  ⋅ =     +   

;:2< β β

αβ α α

φ ξ φ ξ φ ξ φ ξ

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;80<

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=

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C ;6005<

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% ;8/<

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ξ ξ

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φ ξ ξ ξ

ξ

≅ +

(11)

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= ;88<

% ;88<

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α β

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A

0. . 1

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(12)

0. .- ( '

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$

ρ ρ ρ η η ρ η η

ω ω ω π π ω π π

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α γ ω α γ ω π α γ π ω α γ π π α γ

∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂

= + + +

∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ;82<

" " " "

ρ ρ ρ η η ρ η η

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∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂

= + + +

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= ! % ;:5< $ % ;10<

$ ;10< #

ρ ρ ρ η η ρ η η

ω ω ω π π ω π π

ωρωρ ωρπη πηωρ πηπη

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α γ α γ α γ α γ α γ

∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂

= + + +

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(14)

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(29)

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