elastostatika zadaci
DESCRIPTION
Svi zadaci uradjeniTRANSCRIPT
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^'{Alno f. ./rv i i*rc, r a i q ) *;rn|r in/U{
i i o*ios {o{ , {u , fo Pr*v*r ,3, 01 v t*'t;'):A Daioir. F=s[nl, "fta, {*7=@ttPa,8=2tztt'tt /$', i+a /lp,* s D
ry{=9 + J.6.Psmd,=4,
ij#r.flfft7q
L\ i'^o'";cni:q:{ {ri1r.{a ze) Prryrranyrfa{Lest S$ fi iqq,r, ,**o/,;l; ry*,ooD:+U
.y e.
l.0 ril - ,{i, L!}J5 : @-4so.9
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^ {;-"a;'-:= -?- J-*tJ{pqr _ ,rqP( - t$:2.s_ = {e saE i. - {d2W ';n7; ;E
,tt1,3nr,.Jnn> n t fi,9, 4c = i J'r= 7,15,,,,"2
Fcryinagg&*es: &= * t& * 3r58t')n
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r&Druqi(i
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.t
'i /ni'
--\ r lJ t \ t, ,
=) ! Jafo/' a f,1. ZSrpa AB * 9: l.!" c'r fal/rrra t.
3grr: . 4 uro
L-zalmm'
g
fr lg'cct?co: F{s)o6o'.4 y:EF*, = !?"' r'z : *d-:44'= Y:gi4
"(r* qz.l| 'tgz IFil f= tr#=rffi'=zl3ar,/
- {l*/rrA{i^* z*rrr{x; t-r,cr/ r,?!;t: !* A.- g,u*As4ZqJqlql-lA . *o/u,jb '- ;"gr/,'{ F= 8o OP
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ELs/,r/r/;lo * zavr-ipi isp;t zfli'inl r*^-rri,4,;Z&*aL3A, /q{o-1o, Q*eadkt l-!**l h=4*, Q=am, u ta oV
a=2n o; reJu La ita sp{prpefeotb mA-/ 'rro? W -*lffi .;f= -'Fof =--pff*z, tr"- */{rLl Aer:i,:lt?I?, ax= r,p*rpr jp:,#*:SJ.f{= (1.{'r.r{.,g_ ,_;5 * 1+s)14*l = $o {Y,. {e.e)= {;g'J*=u,qJ
#m' I e"rir a * # =' *":#4j*V:\N.=ff8*:T*"i:*#rr*g:Ww1i -l*
-fi :&F =-fr,!fn,E , #;,f;*y*{'PrsjekA
Qaa. t !=fu;**t*roqastlPo, - 7. xY 2 d'rD,i*t= ttq l-!+* *=ff=znra
fr
Za dio za&ita (d)
Vi= Jffi*ff:JWrA?ilPaa e,st{.ro= Gidl za Teprsini rreljp1 &,1^ frs/enq - le$r>o s/*en{s I {Jo{" {F=taort%,)
r; = S"# -ff-iil-g = EQ- t#Si = drd {rpa) , tretadreJ,/, k -Ti * Ta/2 = e# k-wr) t G,, - -E- Hr { = ttLdu-- ttz$zx;= lL{"*.=[.'"rffi^.'=7-''ffii = 4sx#
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Phu /70 L't *el r, , o. d- rlii- : Ri*r*rqu - {rora& $g, SoQPa , {&z = SoN&, l= s}s o\k, , ^ n$ ilapoo,bo
^ u \T, f,r^U aQ*u
){rfdu*r,{* ai*- ll{t =e4,*{r$=s,gb .,V/'
7 sttl {: fiSLxpr,5'
a) s,y'*
+H
"$UsaAr9,="ry1!"
; !orfrs/"/rir -2"/a{nk-48, ?alo jrt fi =
i,/1/."/u
ffH':ffiffil'{p.{, 8"1g, rs rii
.rr#&.9.*/&n* a{**,laSnd =#}ul
ffYav'"* i 5r stnsa*-{ *Ses,nd't=llt&) , {a} rrf{is .
{S.*r *: # =r{, &=* *W=W,fi rutrXktAtrfu{}i,**aeirooagb} ! {* *n* ,,r,,r*_: W%= 6i*fr rr"!n,.;r,P
,\ T""Jf:o' F = t,'/!r='## : 7,,8 rtp^aa* . frai{s, Att lsr*a.zr>e . Az. *t*pm"^! {aqlenage **t&aff; s,u =-rr.*.1/1 =.' ** =* ffi ir:*r,d) S,lq uA, {,c= srcarF*&co+{
=,tt,.t,k,,f; + As*{ttft =q;4Lr,t, S,c=&sip*feszox =iSiaf*apl$3e = /, { g [nJ / F.,q __ JEI fi] = !!f.*zoJqt'q I
.2 E, **y'CI. Jb : rYs = 2 Lrtn ,
tbiIt3
iola,.i.
i%ttL
nf. -
tr._ -lH.-
dlCI= 2/s , TJ;*= gc ll fa,, S = d*o &fq , L = Zn .-i' t,zt :2igs i--s1a ig : A * C : 53g =-$.= *.{g = -iL**
u) ,,n *oL da ?.a = o
L) n. - t t, -:Q 1'./!!idr.4 -/ - -' ! \__Z-lt;*:-"l L't 9;17o, mortr,./a !r*)llnn r'aqlq2,2{.e:at*. e=$d =83,2w
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{{usf**{oz*J*tqAeg.
/,to-zavriri isyi*,r-r. .--
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a) j-r- lo;io ,r/r'roa7o Pa A'A -f:*l. il? TrF= F,l = Q,soilor,t!=**,uf ffE*
+ \ ,J,#;lJ, L\ jr'^;trrrbo*'apit: r* = r9- rP t{ , llgf.t:l .
r* = ryi-. 34.5,, ,^ 7gi.iNiS ; A Svelgnt^,rPa?sqr
T Ta"'z4oq
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i(
,r ],Zq;a1aLl
l,'no\
Y
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, {r ,_;,rt---/ >,s ltLenq-'
-sWEq - 43,5n^ -7-Y
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e.' : 7.^--fi.' c'Di 6d \ {,S. 6o*;^ =:_:II ,l* -.--1Afl1
.'1ji n'i'i{i -il.' 1a-g7to, i,?;r,r? a.' -, -.1, )lr?ger{ i (, !-,t } .r.c,z,s.;1;t
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i I *1rs/u/, lo *,1:V r ssor t :,'b/n,,,3igr,;6 - *.lt,pa"i s.'
;ri.,* ,i. #f1=2Pg rt ":,, -^,1--rr'3
?\,tl- =r? i{f = ZGi*} F j.;:L - ry#d* f,rr= r{r = #f = r}Ern}L.* = 3-4EHE Yit!
"u * %= lyrf = --AiE '?= --7;n -
rv i |nti-,1*.5v:*
uritrt{*,, tt, D* *,{,
,-:e#-xr*,
q
{s*
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E/rEl5e/o/,/o -
Jrug, f*rc)ybln; tsp,l ,zc,v,j*ur { }ero }b, j:fi{ 7: ;.: - .= gs N?a
of {,.9r>,t1.-J'
ct] :6*- f*
bi !trf qzr9o4 q,t sgar,siw
-s a${acrj) lr ,r,r,rami/
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\& FtfupcEa\ +s/[r* ryir'*rb. *7o t
', #" ].'--.--,*- /":#e {!,4ini,..4,*?3e uza i ix}
!**a'- Ft-.lol, fu"2rt &=3F; "
,./ ---jj{.r/- F - j* f, ft., c= E*rr,s.Q=w $ ifi pr^: -" 4 i*:
't@rnht ssf= ico{lfuo , ,,,;d-.r,*./1 ,ltb) 'ttkupp i .*rzrri :*.,tiah,ra J .'riL' Fov2,li gs,1o-,o s,
^-'La./\ -(.-'j :+-r'e ^.ri\ tr-tV=\-_ Lv;*rd;r
;';r = -tGT:a; , Ts , -YELI*: *$,:g {= ,,oe
'))]'yir.*' ncnazsip;b.aapo*q je r/of *c.:.l.it, ,aJ {.,, $4*so fi L It==..;IF=1J,6.r: 7gilpq - --;,-.:5
JetYnrn'-:t" ":,,.o,' SdJeJo 65='vrt dr?r, -*:!-1!!!E, ii.^1 =-+t - 4sze.+i*E,pzrtlrd= {i?,{pa 4.r*F
o''.,;{] ,f,
?fr **___1_'/;?+,rso;
u,r-.
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,^^r^:W^rt-*,t1"5;ro,r).)("'rr='-,oi!''lf i 7l{xl,-ir-41+ f }.
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{: j *:,*::f"t' ylu , }{ t, , !* {'; ili,lno /. -r{,*p,ostr:/t' /frf ?tii* yr,' Z-u',, ,q."^ .-A^2.
J 9gr LI:z-----
&-iX,rtk (P L b= '-1,35r*.{g,t;+ *c*- tn}*6-
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- {.,Ta,-ryf{= *T,t.ca-'ll'+,. Lah
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1rta"36 3EInzlz=*t-t**tf,
.7n "-:*:Ltir=-,4or^,>o,'r*..*},*p*/?d ::4!*o,rtv$ryr
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i l **zzczi i2 ,oo7,t;n;) ve:f*a -
a. {e5 rie
t . 2,t -\.1 i ,l _y? r,.e i q= +L 4 6?oz- -) 4{; 1;-= ## = 7'8 -'' 1 Pi'ou/uter4: "- fi;= ty';*"r'!ito. A, ^ o*e Ja N,l>11fr-z {?* =} .'lr= }Ss{'">a2' 4." 2$3nn2
.' ir.-,p--...s --":'ici . r.s: lp e .fg= / [r;= g:#= ? ,f#**tgtVr'.''.Ul L : *;' 2S,3grri =:
Jr = yls = gSfF> a .'^ oo,- y r. z \,1/. ! n- Lttd] sridtt oi/ontu l,xa-ilco's(+'szcaJ,a=s{?-ttft]:e'ez!-*2'13'#)i'=6;s;Ft't;uttL4 4*= 94sin,{-s2linp =r**-srfu =;t,ee.?- Jlg fu',;,r= .t,2? vtlr-';-r,t-{'l-A=ixi+g, , /,65 lu
,:*.n., hqt, ..,E ; ilu -3lovn, 7d.,.' ao:^: 3= 3o*?o, r:."'o, 7;='/s _:*.t t. J
o, i {.Qo a t'vD' .">orDtr? '; :)- . . - 4ir^ ill ,'' r!r* H;1 = M's { t} : ;::.;=
"t''' ,
/t, ror, ,.bIo!-2 .LiJo3l ,*' * *Z t; '
ilr,-t-lq . y.* - Ltt,', P/d\4 - o 3) "u' :3L . ''Ltla= l'!'l
--
i'!l -C.v,.,=orz.t,iivn;ir - tT,r wy; = zGTt = i+"t't .- -Ijr*_j_
,, ^ ft " #" = !'lfi L^]'D io
bi r;thrsElbhqqge t ..t., iLt-l,-o, =
I ,Y!:J O : -_*_J.-*.- y;' * TJez* zoH.zr- EJ-*z JrysTqzn, F-
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ni
t'?i"* ,d;,:::u' Q'** Eaftp$t 6=2a" {= $AN' *u'=o,o' vgr*r-
..4*-s ^:rr"l Y,*,i ^'{ l;Aro{..,;q;
&- i5 ={,L i;, ie\ .3d=S--r,sl t +e i Po'*,,,
=s st.at= "@= T=7i
ioi{:A !"o{r=l*rrrtra1?1 .
a{, * -t,.c,^-/ - n--*- -i 4u- 4- L :> sio|= :L=?, u*2.*atsv!'/^ -rd{-S-::- I 4t' m-i ' '''t,\ 'r(z) \ !_ -ttn9tr)'2&{&,{.,, A _ -: =4 fpl 4' 1ts{' r W'5 t
*t" {-\-LL :a[.=$s,rp
*Jc.= #^ _i'"' io= drjs 7, tr) {siu fti, :,go!r=7'nlrsi,( {q)rf,-- *lt "'o=q;
*:n,= -s.('. :;-*" ).-
rt' tt[Ar lFA,
,, .c4z , H "{s)q&}' sF;:k{= dr. *- + :X:k fe)z.ild;,c +'"k; LT I .-\ e 2 4'F ut-u / 31 s,a a zi"+.^-r-iyt'- r ii it; *,# *""* * = 2F r) ,h;u661 . + +rl* *sr= 2F =) .a= =2F = = /,NLt/_.Sr= C3gtxt
,_, G*t ':o/ 9,ag4 z 1't porrec'nii rr esieLa -'rs rf = *"r 0,* + 0,, *= $ffi= tS,inot', rr1pr,: dy=+===4:t.51Az $, itlr;6-= 35lflfq )6?or =) J,***,ro,e*a1c TrtiyetaA2, &?#=##4=23t3/hm1g At, 1A.r^ Sir S mmz. v -r a -W flp * zrtt=o gs) t ffo= p&, *- _?, u,.1'4rbta1
, ,,0=q+,tvrilt4= ,|,?2gL+tm, $r=g,,1-_ ^_^_,4 - ::=_':-'l ,,u &fU= ors& i&. i,inU **L) !'ry"zicn,i-rar,1e .
(prcUbr u ltr ,1yp/"n{rr;gftgs,L*tn T< = *r,Ld.'= _1"._ -t:'l ilt_ ", ri^o
t . -Lot-t 2- qW/ = Jry* ? -uu-a/,f{tq4 I I dr,:rw#4 :t- 4w4.v -;87*= vvL
-\ ffi = 86,7 n'4 ': D= 3/ra= 4rc tntz>$on*,-*a{nAe.:elir/a 1* C),-Dr1\rao a3{ova u,t(aty {,** s{,t;; ,,-;{*'"u'tnr*
"J]'.,4 I* L-*ffi-.4- strNPq=4*nax '?ulp,u= 4** = i,ori-ra$ , %=?trv*.= c,*,air$t'o
' W -6ro= $,Tt-:mr- lxnr^. *rcr-t f": s,oo6 ra4
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l-)
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' vlv
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,--:1[\,l "'.,
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bz-"Eu
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i= y,s,:ru
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o,oZr,$!,;a4rc,nz
rz
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= lrl'I-.l,JI n/f2-o a #- ,rP,
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tt-l . if / n'-tn rL- r v"-J \J2
F;-zkrl , cl= 4ooni',1 4L li, ii .r:.: ir . t !- r llrr,{t) l,-toz,coi:a,yje, fx= + -':d=i = *(r-W,, , A=
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4o6zit y',rr.
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o,L\ 7,a . -
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{r'*, $\=i ' ,^, Fr=Gl:=l',, =o + - 1+rz,F,L,.' 'i 5el'+ /='fiffi^, ==i''
= i) + a' 7a * =f
a,-:----r-in-- i i) i/e,/"ol ,'!'""i'Ar-';;-_],.l.i \ ,'.'' *;:'-' ,,olr. Y= ?--- ft= k''irc"iA,--$,-it-o i <
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- i- l- -- -i -*J{'-S i - t:ez t :,?z' \zt ::!i!*ili:. .,-.{= 3.2_,na=6,::l-='--f; i i ,r.. ,, i- - ..' " ./' ia-ce .,.;r;;r; ? JrZ,n {,Yu
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-
fewrti kolokvij iz Elastostatike,09.5.2014 - Rjeienja
Zadatak (grupa A) Dato je: F = 8kN, a =2m ,4 = 4kl'{/m , 6do,=60MPa .
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nl
-
-
{Ltuno treewrti kolokvij iz Elastostatike,09.5.2014 - Rjeienja d fb
Zadatak (grupa B) Dato je: F=5kN, c=3m, q {kN/m, 6do,=80MPa fb
I
q)
r?tt o
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= !31,r (srfi"fA|, F-"- Oqffiq--:, ? -.,&-f .iio.l, zf$ 4a_i$Ajlf
= 4 *p/z a.\ = {S,s at
4\
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al il*m rn / ;,/$l $"e;{ryie*af{e+rva- llr*0 (4)\an+ ?rd= fe* = g {z}fari= W, \ru= iZi G)
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tls= Nx-n^= #il*, =# Lh
= nfg
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ile ! eozIELT *
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.. Lt, _ -
ar\'"t"taloYq t-'ffi-o g
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J}-/'-t S0=-3ta
a) grole]ilFx+A * F* aa{*a*a{rc*a{u=a {.}A{an = -Fa.\q-, at,ap fu-g
FaaAAtco = F"-s QrA7 )
{u = fu ^F,, 6-r= fi-q E*={E-r) a$EAz
r"r3
E*lt
+ FsqgEAzSF,-r)tr-r)r Fa=p g)fr- 9F- t.ql^/
$ jtnenztaorsanp fr- #= 4/t/{
.r FH=t=orrFdz-z= f=f**A,,
* = ffi = $0,9maL, &= * : 10,2b7o2/ Ar: (a,9n *rz,
Ponfnayt /"{le n/n*t
=-z,g /r?bZ ---g-brLF
uno{oa{r} ,qr.#N=
=- {!.2r,lg
4ar97zr.f .ig0g;gro* Jf &qra4 ,oa s& ril, jy,an fw.rcn(fr rq{olqfn=
- u{r, =" - rtfr-q - -
h1jagr.n .f /ot na siei,
fiq=-rlr = -$3a+
-
I7,AA/ ratot/*s*^* Aq - K,MqT-tu.n4,
r( t\_/' cln c F.
X,r= ZYttA;Ax*=@*
fi,4+7;12*u*./vc : AraZ F-n
^,=T,'i-if.' reX H**lw-ffia&, = z+1e*t, Lsoxriox:W$ w,,,.,^ | lr a,n cnIS,. 3g,l WlIP
= s4ecrrl
V *58,{ent {4.rebq erui>t;et,{i dq-cAr&y.=-Jt;-ffi' ='38,tul uzidt*J*/ aftakr'a*e;
ilrl
il l rf ;t, {, { i, Jq . ! x. ; y* I tbe ersy !t'> e{' i; e.fP *Sl,{ero* Q*1Sl y,*,ie{,/i Jq.L*n; rr#l itq e-szt-rt>P/r7ie,r",ya---f-r-r-r - ='18,1t^1 uzfdred*,t' "rr:k,:?n r:q. + 4 *z ,^ - ^^^ #.TJ,t,* = fg+ f3 = (srgrr 4e)*,r* =u*ospA\ lz,^t= Ji %- fia* .Q& . {92 SSS a";
t2
a ,tqIe1>r'--Z
*r-&,*,-
* /r5/ov{*.,_i p ftri",ii'
-
K-( tit noKolokvij 2 iz Etastostatike, Malinski fakuttet S *^/ilri.| i, .4.Zadatak2 (grupa A)' spremnikpravougangg popreinq presjeka prikazan na slici, sadriigas podpritiskom F=2Mpa. Ako je I = 2 m, a-= SO i*, Ir
= g0em, 6 = 1 0 mm, F' = I 20kN, odrediti:
(a) naponsko stanje na erementu D (bpienito ravno naponsko stanje je prikazano, odreditiprikazane napon, 20 bodsva)(b) glavne normalne napone i priavce ovih narcna {lg bodova),(c) glawre smifue napone i ravni na kojima ovinaponi djeluju, treba skicirati oriientisanielemenari oznatiti uglove (I0 bodova),(d) makimalni pritisak ako 1.e dat dozvodeni napon na zatezanje o a = IAAWa{t 0 bodova).
Trn=To
Napomena: Srnatratf da sila F uzrokujesamo akijalna naprezanja u praycu x.
*K
o
-
4 = terk*1.
&tr= -Wqru-z|-=-sqrcn+\
-4 = 4)*r?, #- r-9'7
-T-r = $.t?r #. rY I r*= 4"'{*25'n14= ;. A,-r,fr;{zx* $,ou-s,p)1nil,}= n+*l Slt rrr*,*{* =fu,n *ttv.{-t,+}f *,Ad= 4a4e o'e+
S=&"*{e,.+liu=Wrb,s cufd*|,= t33,3w+ lrt=iy,o{*u-^')tr,"f#*b*rrYb}ut= "a"tH=;r:'u!,T,fo{#* {o,s-r,ql.uk, = Q.czg* .lg=ry,* (**}'t,={# r P,s-1q1f7}';= rssh*ir* = r,{ ;r$,-{.r{- = i: *i *. i Ii - e effi=npl * = ry+ { rca- wh,, = {'$ * P o, rf r Fa = s's t;S =fsx,e *t*,t* Zttp+k,q]r*t = als,'t c.* I $=Lr*,r+ re**sg* qe1*\ = @It l : Fr,yr r(ra, -rrXru.{J{ d * ffir f *- xcY,t o*}AJ - S g * * J' {Y{. & *Wq g l'Jk; =fnr* (-r,s5+tdXs0r-q r4r,4,b+{qs*,r1;E-a'4$*fi*(es**4Yqs-qn4d*F- {*tl'rlY# *rtIs; =- rl\fl-s t 3o 4'8] cd = ,'s*,+rn*{) f,>t7wor nomen/i' ut = fu= ##-= 4, ry=fu=#,=:'''u}
At,"*Xlra4r= ,ts,leoz
I;rt= Z+ctmlT,11= g&r*n\4= 3te*,,
c) *hvni -o-rn/r'n. :Ir,z.= W*
T,t,L = -{i*,L b\
Kolokvij 2 iz Etastostatike,
t L JffiEt,tqr =
ifakurtetsarajevo, rr.(.fu'|.n0 F'xc = eW; , *L* f,*r.ji
xr=-t,98'?,trq*B-y:7!, O
-^- Aers +6aly@*@LL=
-4i w
I,tr@,ei
LA_^ ^ ^..,i 32tr3*' , Zq= 858$ cnb r ry
r-E]sr,z*>ol Tuur. e{= 1,7" {P"}'o"o'adr;)Cas7.*>o J
d) v,g{; rja r4A [q,av, t*?= {ax,t*ltz,z;*a = 4oeflfi b>+ 6"s{e'"t'=r"o*c1;rs)lt,ixt = +* S = bs',; 2t,-.2 - **)d= {ao{r*"f {tr)g) v,{e+; rjei. E4A
-
/- [-i u noKolokvii 2 iz Elastostatike, Maiinski fakultet Sarajevo, ,r.r.r,16/
Zadatak2 (grupaB)' spremnik pravouganog popreinog presjeka, prikazan na stici, sadrii gas podpritiskom p=2Mpa. Akoje: r = zm, d = s0;, & = g0cm, d = I0 mm, F = I0k].{, odrediti:(a) naponsko stanie na elementu D (opdenito rtlvno naponsko stanje je prikazano, odreditiprikazane napone, 2O bodoVa)(b) glavne normalne napone i pravce ovih napona 1tO bodova),(c) glavne smiiude napone i ravni na kojima ovi naponi djeluju, treba skicirati orijentisani elernenatioznaiiti uglove (10 bodova),,(d) makimalni pritfsak ako je dat doaroljeni napon na zatezanje oa = l(}LfuIpo (.t 0 bodova).Smatrati da sila F uzrokuje samo akijatna naprezanja u prave u y.
B-Bsas ood
debrjina ,,ffiitiskomP
4
t,'fu'qpo,>3tc
-:!an;f*, P r|')qL
Y F"o"o.'
ZFq,'=a
e {qrni oap*>i su f7= ti: {ortftPq, dz-- } =3ares*,o" ,, O !, K S,s frewtl gfur;$n */"rlnqPOrTa( jr T**o,
-{{, er"Jsf*r$i *P.ryel u:{ou.q eAs{rino rn--abltoyerq}.*tqLsrnaln,/nrin. sniiuc?' Hpcrts sq nonquainq 7d aSfrnt{s" QJnorq a7o'r7;g{aurtAnoPha/oif] naPw)e.
ft\bJr'}-1xr'l'.i *\ 'f tx= lsY = *,.:letsr'o' j55&'fi '."-Y'tflf,. -J_
*\\.4 -zi,itlPqL"s"-
$a;si*tq{,t; fr&sql, y - M 1{d =t r < ee&$*r - ":*%:*,r#*re?'4,*!3:-w. t z\r=# , d,*=fifu= ffi=r{,snr4#
'{pv ? {t "J.)
Ird]
-
Zadatak (grupa A). Za zadani sloieni presj,ek na stici:(a)
.izratunati aksijalne i centrifugalne momenteinercijeza teii$ne ose presj,eka fg-* ZO boaova),(b). izratunati otporne .momente inercije za dvije
.
teiijne ose (2 x 5 bod} - -'r- '(c) izraiunati glavne momente inercije i polo2ajglavnih centralnih osa inercije (gcrtati glavneose), (10 bodJ,
(d) objasniti kako se pozicioniraju glavne ose (t) i (2)u odnosu na raspored eteminarnr,-pJ#j,lrJ. .
popretnog presjeka oko ovih os" (S boOJ,(e) kako bi trebalo oriientisati pop*e"i presjek uodnosu na opterefenje da Ui nor.iir"o na,iveCu.- .nosivost prema savijanju (5 bod.),(0 kako bi trebati postaviti profile (L u odnosu na Uprofil) da bi znaiaino povecali moment inerci.l.e
za jednu od osa (skicirajte) (10 bodova).^r
J#lestnre:
iI\ '.1, -.J, J'n J\) ALsi ialni, terfri{uga/nt lryldnfr'At= l1,l t z
Ir,a= LiluilQr= 38,lcn1
EP= 31{un\,IP = sq4 c"11
T*,11= ^5,4 U'?
_ . dimenzije su u centifieirima/hfut1g
vr. &t,* t t tlg.Az -ftzAa-ktfi + ^AttAz-Az-A,t
.rc= qgle{44,es}fi,t *a-a-t/.2-i3,,{ *$c 4-2 Ch
-_\ r -' L-I5= i:ast{sJ{ -{lr2-D}r5}#= 'lo5l cn'
-ig=4'.d'-'8 &&u:tr{fH,\ r.o)c,},= -3#
6ar -b
-frf' = ryu{q'- !r+-ri}('{tt; Y"ll!= ' i q'u s(c * i+-epj(C-6fr)'2)rn1= -\tn'
!L=1clttiler,4r-UctLs-il.rilq-@+vlfit+&siyv'3*1At* Az -Az*Ai ,t'3i1+l3c-gt-Z
jfe = G,* th
ffi-'f '*f$'l=wct4 = r'rt+ {u^^oP'{r =Pal* i{-dss !
ff = & * {q,- NJ' ar= {4 r fu- qo tf rx'S='l4ll',1'g = 4, + { *,' x"k): (1$ r{n*t): e a)= n' e "!tF = 4,, + &rS* = (+ r(a- *uf''S = L+ u'!
e= (rx+a*-5{-tE7'} = E3{ cni
J.Q = T.xt,,t+ {ret-xrt{P,-(tifla= ,'u
= (rql + c-;;;'i,i,1['!r*' E'i){l,i='ic''?+16, "r. rto r,
-
7-*i-s.
lf,l-,*=
TP* =lai
IilftIqx
g) \Lavrr t7)ornrr/r' i 6io,trt oJe[,,r=B*Lt+ =nfiY,fi * Ty = {ost cr$ t -Ts * 2"= sssrl"tgzA= j{L}_*o {l)*\ , (r)ohv lf
- l3 (p* f j'e 7r,li,ir* c-tq si;,,s/rlu ) '"
d) Po, icior*o(/ r 4h,i"i/t'*1 f"',n!,^ {:r5'1) o.u.f,I v6 /L/O/?//'.rrr7.4*'1v"'. ', _, ; I ^/.._'n' r = s4 i/o y.rrt?javrq eia {t) se ,oez)t)cntr44" ,& u/r-foAt* 7>c'urszn(*, ,
_,1 !.,. , t ie/r. au Na t2).u,)aiiene tt cJP. Ck-nafo tr1|1r 'l
e ) ci it'/Cr1pnt' o:a]yt sa*'/ : ',*'*' l - {: /^1, A ,uo {D;e oLori,,i;sn/i:nn1t /"hg 1lJ&Le t , tv - )-) t-J ^i l^^Fl/Fn/rJQftrp lfarr.u'i **"soaA *" ,flf './ / / /n* sile saiian/q ainc;no Tcraleln+ scr,.t {/
t) Po:{or$of/u prrfi/o L q Jnastt /"q U -
a)&ra ?q A
Cfpernf mop>enft'r#s =
7e,.J n\:-!u
Tn-+
612txc
tl- naslata L
__ 4*sV cd =,5+
rqA e^V{* aA-
Ll./
5+O,g{
rbl,o46L un'
,14 rn'
AL
\t'lx
nrc(b
-
b4F!1uoo b'
PM kolokvij iz Elastostatike, Maii nstfakultet Sarajevo' 08'03'20 1 4'
Zadatak (grupa B). Za zadani sloieni presjek na slici:
(a) izraiunati aks'tjalne i centrifugalne msmenteinercije za teiiine ose presjeka (3 x 20.bodova)'
(b) izraiunati otporne momente inercije za dvijete2i5ne ose (2 x 5 bod.),
(c) izra(unati glavne momente inerc'tje i potoiaj:-- giirnirt cenlrdnih osa inercije (ucrtati glavne
ose), (10 bod-),(d)objisniti kako se pozicioninju glavneose (1) i(2)
u odnosu na raspored elementarnih povr3inapopreinog presjeka oko ovih dsa (5 bod')'
(e)'kiko Ui ireUato orijentisati popretni presiek.u'-'
odnoru na optereenje da bi nosai imao najvedunosivost Prema savijanju (5 bod'),
(fl kako bi tiebali postaviti proftle (L u odnosu na U" profil) da bi znaiajno pove(ali moment inercije
za jednu od osa (skiciraite) (10 bodova)'
$ble'ft '{a) A Lsii'*/n;' *rr/"r{a7ab; n>cmtntt ttnrory(
Ar 41,1tnL *e=_$+us)fl{+Y9w
4,4+lso-s*-zx",*+xs?}.^Y$As'X4Aqfutaz-As-l*
ir< = Zico?i;:* 31,tot .k= - a,eA *4 = 1fi cn' a = gtr tu + fuA,2- h:As-k+A+ _{jt-+l4k,l+eF'.ls+"wG
-R r^L'
-
'Ular{A -qL -'/i l i AY = r1c!"' , t[= 9ttAt+5{242-Ytj^3'};1t'1
-_ll \"r''i-iij -1?=;e,td'+ ''r' W- 43,tt{3o-e-LI ii : ,*t t. ,r .,r,t,r* ii ir,u=+144cr't+ le - Erof cn f\nurq, i i
&r= V3#,'
{= ;1":,r};^,:t;;. -'
fi = -4,,r;,;
=$n{t,"v-rq*faFrzt+u}
tf :r*u+ iq..-eu)12=@-rr-ro! =uu,\ ry^**.&r-ff -rr-, c,tti:i *oli +Bt'T;i,
n I R =tuu+{to-&ir =(*+ro -{-qs{f' n}t}
: *' v'? tn'r /^ , \ r. ..
-i1 .\ i n'
fgu+(*t*iau=(#+lo-{-qsd '812}to: J1
' t
1p"*rr{4$*=#rp-q'#uV =1555,tmt ly;, -
r, -,\zr - {tn.r ,{-L-r',iy.2\d=lz,+rrn6.ffi T.,l -:;;:r ;:";' * ?. \' q:,=,,,*:::,','r! :):= ;{,;;i=*ff:5 y,:Y;': E,* ii4=^(4tnr,{tz{ v-4?,t'ts,,),A,= 3t'^-
* -o-)-92 #r id :#,,;;,f;J.||,li,n-flli 4n,ft5,sa3ISy- -l.r}r}
,i\-gi -r tt? -. roo, - rq[gsn-g-);41 =, I L- 1 - 7ta)*{:1,:)r,i = ??fyLi!= t21*,,:(*' ^.1;: il'li"i.,.l ._ t\qcn\ i f*,. = i35,i -1221
= (, * ft-f',n0)(6-'ic5)2Jc'at= 119i.n\ i f:5 = (35': -122;
-
. CrupaE -nt;s/qvaL
D{ prrnino menf i et 't/ -tu / tc\a' L1 rL' +
ry unc f" 5 l\i*,*- Uc ,a{
B2q
c) &Lq,.tni ****r/''' ,'g/"'rtP c58 nfr'*?&T,n c il+T*J-1lt-
---=-
t = za4i *,Etqtd,= -JEL-