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Previsão das características de vibração e amortecimento de um laminado compósito

José Pedro Arteiro Reina,A. Torres Marques,J. F. Dias Rodrigues

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,;&- E+&,!'),!'9&: A!- 9&, !' &  +) ,;'  !&(  9&,>/ ,)  9&, -)- )  -+-,&'-,!'+-C9-+&-,+&<+&N+-9-,+!( +-'QO+)-),!-,+<'9&1&-&!-,' & )1&2 &1K  U& H$I , JJ ')K&, , ,)  ),!' 9!'  ! 9&,>/  -&' '&!1&  &,  +&&  N(" "& 9&,'!"&QO2' &,9'-+),!'E'!/V9)E/9)E/V'&>/ !-,+&',!'!.,-1(),!-,+<'+)-,+>/!&( ++&-,+!!''!/2G!(!H5I,JJ-)- )&, +)-),!-,+<''+P!()3+)QR&-&&!B,-!'& >? !&( +  - , ) , - -,  +& -,+!!'  '!& '!/V9&,>/2' 9&, ! ,),!'9!''&,!!)-!'' 3 ,+&'.!- :   '!?V9&,>? !'&),!& &+&!', +&  +>/  !&(, )'),!-,+<'2 ' '&)" 1 B ,+&'.!- :   '!? !'&),!& &+&!', +&  +>/  !&( &-&& 3  , ,)  ),!' 9!'  ! '&  -, -&'  H4 MI :  +&,' !-) & +& );,  9&,>?  -&' '&!1&  1&>/9&,>/!&,)'&!1&2')K!  ,)),!' ,&'-,;'!&(9&,>/,)-!( ,'& -&-'&C'-,&'-,!'1&>?+)-),!-,+<'2 ;&&'&!202&( 2&&&:    0#  ),!'9!'!-,!-) /9&,>/V'!/!&,)'&!1& +&,' :   '!? '&!1& 7, -!'C!  ! !'&9-  -,  ,'&) 9&!'2 0#/# .1(+ . -,+)-,!' ON 6 ,)99!&)'1,!'', -&!WXU+)--,,'&9( &!WX-!--,+)!,; +)-2,)-,!' ,+!'(!;&-+)-9!,3( !'9&,  NKOONON NKOONON NKOONON    7 ! 7 7 7 ! 7 7 7 ! 7 7 -8-6 -9- -:- φ φ φ ∑ = ∑ = ∑ = = = =  NO  0( &2',-&!(,'&+)-),! ! ON 777 89:  / )-,!' ! -  !< '& C  )!(  + &+)-! NKO 7 φ /9 !>? !,!!!'&+)>/(&!( 9!)-),!',,C!( !+ &(!+& -&-,9( &29 !>? NKO 7 φ '/!/! )+! !,C!)-)- ,   1?+!!!<7; ,!<!'&&   ,!<9&!'& 1/2'9 !>?,+?, ','-,!'-!'!  '+#)-,!')!(+ &),!& )'!,9&,>? '&!1& -!'C!  ! 9&!'&    -, 7-!'2 ' , &3  +)  -!'!   '!? '&!1& ! !'&9-    -,  9&!'-&-'&C'-,'&+&'!'-&-,&)9C-21B9&, -,  -,+  )-,!' 9 9!  -&'K>/  +)- ! ,C! ,!!)WX;9'! +&9C-,;!+&-!<,)",!!)'&3 3@ ,-!7 !'(& )&)!(+ &2 ;&&'&!202&( 2&&&:   $                               φ   φ              φ φ  φ      ζ   0( &2)-,!'!9 !>?!'&+)>/(&!()!&: &@'- !D,&!<!'&+)>/)!(+ &+!(& 9 !>? !'&+)>/  -& -,  E+&/   + × = !/;!!1;  !  !/;  &+&!'  !D,&  -, ! ,;&-2  <  9 !>/  !'&+)>/ )!&  9 !>?  !'&+)>/() NKO 7 φ /+)E+&?          # VON VON # NKO + + − − + −− − > << << <        −= −= = 7 77 77 7 77 7 77 7 7       φ φ φ NO ! 7  −7 /+ &-,! ,;&-772''&)"+&);, 9 !>/!'&+)>/)!&&-&&,B9 !>/!'&+)>/: &@'-<'! +!'!'&+)>/+&-,! ,;&-! ,)!'&&      += −= −= = ONNKO NKO ONNKO NKO         77 7 7 7 77 7 7 ζζφ ζφ ζζφ φ NO B9 !>/!'&+)>/-D-<'!$+!'!'&+)>/+&-,! ,;&- !)!'&&  ( ) ( ) ( ) ( ) ( )        −−+−= −−++= −++−= +−++= = ONOVNOVN ONOVNON ONOVNON ONOVNOVN 4 J  4 M  4 M  4 J $ 777 7 777 7 777 7 777 7 7      ζζζφ ζζζφ ζζζφ ζζζφ φ N$O  ! 7 ζ N1&9( &O; ,9 !>/+& ON  NKO −−= 7 7 7  ζ N5O ;&&'&!202&( 2&&&:   5 0#0#( 234. 235(+ .  9&,>?  , +!' (!;&-  +)- ),! ! +!  &)>? )!&9&,>?V)-,!'-&1,3( !'9&,  ON ON ON       - 8  9  8  :  9 - :  8 - 9  : 7 7 7 7 !/; 7 - 7 7 7 7 !/; 7  77 7 !/; 7 - 7 7 !/; 7  7 7 !/; 7 - 7 7 !/; 7  ∂ ∂ + ∂ ∂ ∑ = ∂ ∂ + ∂ ∂ ∑ = ∂ ∂ + ∂ ∂ ∑ = ∂ ∂ ∑ = ∂ ∂ ∑ = ∂ ∂ ∑ = = = = = = = φ φ γ φ φ γ φγ φ ε φε φε  N4O 0#6#( 23+&) .  +.17 ,+)9-!-,+&',!',-.!- ,,'&)-,+<' ,-,+&',!' )!& )@'-  &)>? -!'' '1 ' ,'& '! , -!' , ' '&,!!)'!?/9!+)( !'&)>?  { } [ ] { } =>; 7 =>; ?εσ = NMO                                          =                     -  -  -  -  -  -  ???? ?? ?? ???? ???? ???? γ γ γ ε ε ε τ τ τ σ σ σ 44444 55$5 $5$$ 4 4 4 ## #### #### ## ## ##  NSO  -9-!','&K&(K [ ] 7 ?/''!,-!&>/.!( ) θ  &!'>/9&&)'1,!'',-&!+)--&-, 9( &  '&1;  E+&? 7,!' -!"-  :  +, & !-!'& ! )(&9&)'1,'&-,+<'HSI2       θ     0( &2>/',-&!,'&)1& ',-&!+)-WXU2 ;&&'&!202&( 2&&&:   4 0#8#$.&( 29)  + (: .( +&!-C+1&-!),)'!+&),!-,+<''!,-!''& (!&)K+)-),!;9&,6  { } { } { } { } # ON Y YY ONON OONONNONON  ) )    =    ∫ ++ ∫∫ ∑ ∑ ++−    +++ ∂ ∂ + ∂ ∂ + ∫  ∫∫    ∂ ∂ + ∂ ∂ + ∂ ∂ + ∂ ∂ ∑ − = = = ' -8899:: -8!9?:?8 - ?8  ? : - 9  !9 - !:  ! @ ' @  @  ' @  !/; 7 !/; 777 7 7 7 7 7 -7 7 7 7 -7 7   77 7 -7 7 -7 7  !/; 7 Γδδ δδδ δδδδδ δδδδ Γ &&&&&&  NJO !    ??! ??!!! 7  A  - 7 - 7  7  7  A  --- 7 - 7  7- 7 - 7  A A A A ∂ ∂ ∑∫ = ∑∫ = = = − − φ ττσ φτττσσ     ONO Y  Y  Y N ONON  N#O /9&>(!&)K B 7  A   7 A Aφφρ ∑∫ = = −  NO /!;&-),!'+)-(!&)K!&+&!'!D,&-, -,9&!'&!'>/9&2 '' !!: >/#&)>?-!'' '1 '!,-!'&)>?9&,>?V)-,!'9&>(!&)K+,& &-&'( !'9&, ∑                           ∂∂ ∂∂ ∂∂+∂∂ ∂∂ ∂∂                 =                   = !/;          7777 7777 7777 7777 7777 7 - 7  7 - 7 - 7  9 : 8 -8 8 -:9 -9 : CC** CC** C*** C*** C*** ? ? ! ! !  55 5$ 55 5$ $5$$$5$$ 44444 4 4 #### #### #### #### ####  NO -,6  ( ) ( ) ∑∫∂ ∂ = ∑∫ = = = = = + +  A  7 A  7   A 7 A  7    A ; A ; A ; A ;   ?C ?*   45$-, 45$-,   φ φ φφ  NO !6 ;&&'&!202&( 2&&&:   M ∑                           ∂∂ ∂∂ ∂∂+∂∂ ∂∂ ∂∂           =           = !/;          7777 7777 7777 7 - 7  7  9 : 8 -8 8 -:9 -9 : 55// 55// 5/// ? ? !  55 5$ 55 5$ $5$$$5$$ 4 #### #### #### Y Y Y  N$O -,  ( ) ( ) ∑∫∂ ∂ ∂ ∂ = ∑∫∂ ∂ = = = = = + +  @ 7 A  7   @  7 A  7    A ; A ; A ; A ;   ?5   ?/   5$-, 45$-,   φφ φ φ  N5O  '' !9&>(!&)K: >/: >/$!: >/J', +&!-C+1&-!),)'!,9&,-,+-'6  ][ #Z[Z[Z[Z[Z[Z[ Z Y [IHZ Y [Z[IHZ Y [Z Y [IHZ[Z[IHZ[  ) )    =    ∫ ++ ∫∫ ∑ ∑ − ∫  ∫∫ ∑+++ ∑ − = = == '- -5CC* @ ' @@ ' @ !/; 7 !/; 7'7   !/;  7'77'77'77'7 !/; 7 Γδδδ εεδεεδεδεεδε Γ &&  N4O !6  { } 777'7 777777 '7 9:8 - 8  8 - :  9 - 9  : Z Y [ Z[ =       ∂ ∂ ∂ ∂ ∂ ∂ + ∂ ∂ ∂ ∂ ∂ ∂ = ε ε NMO 0#0+; 291(.4 ,,;'),!'9!',C!,!!)--,\! ,;&-\ ;-&'K! ,!D,&9!' 3,C!2) >/+&E,+&),+ &(&!-!'&'&1; ,-,!>/)!&9 !>?!'&+)>/ +&' -,+-'2 , +&  +)!  -'  < 7  ! !'&&  - ),!' 9!'  )-,!' 777 89: /E+&-,-,!>?)!&9 !>?9&,  ! )-,!'! 7  7  7 89: ( !'9&,  Z[IH ON ON ON ## ## ## Z[ ONONON ONONON ONONON     77 7  7  7       7  7    7  7    7  7    7 D 8 9 : ! ! !  -!8-8 -!9-9 -!:-: =                     ∑ = ∑ = ∑ = ∑ = = = = =  NSO ;&&'&!202&( 2&&&:   S !;!D,&!<-),!'2!: >/S'!,-!' &)>? 9&,>?V)-,!' : >/ 4  +&!-C+ 1&-!)  ,)'! ; &-&'( !'9&,6  [ ( ) ] #Z[Z[ Z[IHIHIHIHZ[Z[IHZ[      =    ∑ − ++++ ∫  ∑ ∑∑ = = ==  @@@@0  ! 7 '  7  7 5 7 / 7 C 7 * '77   '7 ! 7 !  !    δ δδ &&  NJO  !!;!D,&),!'  [ ]  'D  ' ED   ED&  5&D  @ ED&  /&D  @ ED&  C&D  @ ED&  *&D  @ EDBD  0 7' F 7 ' 7 7 5 7 7 / 7 7 C 7 7 * 77  '' '' '' '' ' Γ ηξ ηξ ηξ ηξ ηξ ηξ Z[IHZ[ 'Z[Z[ 'OIHI Y HNIHOI Y HIHNIH 'OIHIHNIHOI Y HIHNIH 'OIHI Y HNIHOI Y HIHNIH 'OIHIHNIHOIHIHNIH 'IHIHIH                         ∫ = ∫∫ = ∫∫ = ∫∫ = ∫∫ = ∫∫ = ∫∫ = + − + − − − − − − − − − − − − − − − − − − − − −  N#O -,6  [ ] Z[ ## ## # ## ## 7 7 7 7 7 - 7  7 - 7 - 7  & 8 9 : -  - -  =                           ∂∂ ∂∂ ∂∂∂∂ ∂∂ ∂∂ =                   γ γ γ ε ε  [ ] Z[ Y ## ## ## Y Y7 7 7 7 7 - 7  7  & 8 9 : =                     =           γ γ ε  NO )-!!1&@1!),!'&-,1&@1!()'&1; 0&) 0/!!3!D,&'') !<3!D,&!< ,),!'  { } { } '  !  !  !!!!  '        (& 89:89:89:89: 89:89:89:89: '   Z[ Z[ Z[IHZ[                 222 222 KK KK = = =  NO ',: >?(): &(,,1,!'',  [ ] [ ] Z[Z[Z[ @0 = + && 2 NO  -&-'&C'- ,  1&>/  +)- ),! -,+<' 9&, '  &),!&)K=)&=-'&&<+&&-&&!,;''&>/  +>2  ( [ ] [ ] ) { } { } # = −  *0@ λ !   ωλ =2 N$O ;&&'&!202&( 2&&&:   J 0#6 1 +  .+.1+<4+ !'&  1@& ,-!,  +>/  !&( !'9- ! ,'& -,+<'  N, 9'O 1&!  E ,+)'  ',  +!' -, !,(!9-'1  +& !&( +& +HJI2 -,+&',!'1-)@'-,'&-,+<'+&9!+),&'-,!' "'&;-'-+!!'9&: A!-E-'>/',+&' &,!'2-+- ,&'-,!'+-C9- ,,'&);9!+&6  : :∆ ψ= N5O ! : ∆ ;!&(+ &!' ,--)'!/ :;!&(9&,>/ ,@E,2,L-!+&+ &, ,,),&'-: -,!'-!', +&E,&  !&( + ! , ).,!  K!    +&+&  ,&'-,!'     +&'&  +&+& +'1  , ,'&) &''&<+-'E+&,!'),!' !+&1''+1(N-,9&&!' #]  η J#]  η O+&1'-)C!&-&!'#]  η 21B9- )'& -&&-',!'9-'&+&  η ',3  η η = +&: ,,+&1&>?' 1)&';5^!/1&9-&,)'&>?!& )''<&-'HI29-'&  +& +!,  ',+&' &  9&: A!-   ,+)'   9&,>?2  +&!'' !/9&,-!&!9) A!-: &',+&' &: &9&: A!-   , 3 1&>?  +: ! ,+)'  +) :  ',;,  +!A!-  9&,>? 9 +&K2  !&( +  '&,! -,  , +)- ),!+&-,+',-,+!!'6  - -: A '  *  * A A A A A Z[IHZ[ ON_        σψε γτηγτηγτηεσηεσηεση ∫∫ = +++++ ∫∫ = − − N4O !6                  =       # # IH η η η η η η ψA NMO !  &)>? -!'' '1 : >/ S  '&!+! A IH ψ  +&  ',  -&!+)-!&(+! ,-,+&9!+&6  { } *?*?: * A  A * A  A  ' 'A Z[I ` HZ[IHIHZ[_     εεεψε ∫ ∫ = ∫ ∫ = −−  NSO ! I ` H?; ,,'&K,;'&-2!&(++&'+)-;+&6