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7/31/2019 Amity - Stress and Strain - Why So Dumb
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@hnqgnq
Pqsg 0Pqsein 0Gfeqi`iqy ena _feqi`iqy 1Mhhdg Fer 7Gfeqi` Fijiq
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Inqgssgfeqihn cgqrggn G& & D ena @ 5
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Pqsg
Qmg inqgsnef sgqhsinb lhs`g pgs wniq esge gq wp riqmin qmg chay&
rmgn aglhsjga cy qmg g}qgsnef lhs`g i `effga qsg.
Pqsg :
PI wniq i Nj*3
Pqsg i qgnhs uwenqiqy
Qgnifg qsg @hjpsgi|g qsg
Pqsein
Qmg qsein in e chay i jgewsga e qmg `menbg in qmg sgfg|enq
aijgnihn pgs wniq aijgnihn.
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Pqsein :
Fhnbiqwainef Pqsein Pqsein i qgnhs uwenqiqy
Aijgnihnfg uwenqiqy& qsein i qgnhs uwenqiqy.
Gfeqi`iqy ena _feqi`iqyQmg pshpgsqy hl qmg chay awg qh rmi`m iq qgna qh sgbein iq i{g
ena mepg rmgn qmg eppfiga lhs`g i sgjh|ga lshj iq i dnhrn
e gfeqi`iqy ena qmg aglhsjeqihn pshaw`ga in qmg chay i `effga
gfeqi` aglhsjeqihn.
In `eg& elqgs qmg eppfiga lhs`g i sgjh|ga& qmg chay ahg nhq
sgbein iq hsibinef i{g ena mepg iq i dnhrn e pfeqi`iqy ena
qmg aglhsjeqihn pshaw`ga in chay i `effga pfeqi` aglhsjeqihn.
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Mhhdg Fer
in qmg ejg rey e e psinb esg eia qh cg gfeqi`. Qypi`effy il
rg jgewsg qmg g}qgnihn hl aillgsgnq lhs`g ena pfhq qmg bsepmhl qmi& rg riff lina qmeq qmg g}qgnihn i pshphsqihnef qh qmg lhs`g
eppfiga. Jeqgsief qmeq hcgy Mhhdgp Fer g}miciq e finges
sgfeqihnmip cgqrggn qmg qsein ena qmg eppfiga qsg.
Mhhdg fer qeqg qmeq riqmin qmg gfeqi` fijiq qmg qsg i
aisg`qfy pshphsqihnef qh qsein.
Pqsg Pqsein
: jhawfw hl gfeqi`iqy
E yhw dnhr lshj e psinb& il yhw
bseaweffy qsgq`m iq& qmg lhs`g nggaga
in`sgeg& cwq qmg jeqgsief psinb ce`d
qh iq hsibinef mepg rmgn qmg lhs`g i
sgfgega. Jeqgsief rmi`m sge`q
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Gfeqi` Fijiq
Gfeqi` fijiq i qmg wppgs fijiq hl aglhsjinb lhs`g wp qh rmi`m qmg
chay sgbein iq hsibinef i{g hs mepg `hjpfgqgfy hn sgjh|ef hl
aglhsjinb lhs`g ena qmg chay fh iq pshpgsqy hl gfeqi`iqy ena
bgq pgsjengnqfy aglhsjga il aglhsjinb lhs`g i lwsqmgs
in`sgega.
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Pqsg ena Pqsein Aiebsej
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7/31/2019 Amity - Stress and Strain - Why So Dumb
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Gfhnbeqihn
5. G}qgnihn hl Ces awg qh Eppfiga Rgibmq
e) Gfhnbeqihn in Ces hl Wnilhsj @sh*Pg`qihn
: G : G
: G
c) Gfhnbeqihn hl Qepgsinb Ces
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T Z
T Z T Z
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3. G}qgnihn hl Ces awg qh Pgfl*Rgibmq
e) G}qgnihn in fgnbqm hl ces hl wnilhsj `sh*
g`qihnef esge awg qh iq hrn rgibmq
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e) G}qgnihn in `hni`ef ces
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`) G}qgnihn in `hjphiqg ces
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: : $ $
| : { } yCwfd Jhawfw : D :
_hihn Seqih -)
_hihn seqih i qmg seqih hl feqgsef qsein ena fhnbiqwainef qsein.
Qmg |efwg hl i |esihw lshj ?.37 qh ?.00 in bgngsef.
Jhawfw hl Sibiaiqy -@)
Iq i qmg seqih hl mges qsg qh mges qsein.
@ :
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Inqgssgfeqihn cgqrggn G& & D , @
Sgfeqihn cgqrggn G& ena D
Sgfeqihn cgqrggn G& ena @
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Sgfeqihn cgqrggn G& @ ena D
Lshj gu. -ii)
G : 3@ -5$)
* 5 :
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_wqqinb qmi |efwg in gu. -i)
T - )Z
G : 9D *
G $ : 9D
G -5$ ) : 9DG -
) : 9DG :
G : : 3@ -5$ ) :
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Pqsein Gngsby
Rmgn en g}qgsnef lhs`g e`q hn e gfeqi` jeqgsief ena aglhsj
iq & qmg g}qgsnef sgiqen`g i ag|gfhpga awg qh `hmgi|g lhs`g
cgqrggn qmg jhfg`wfg hl qmg jeqgsief. Qmg inqgsnef sgiqen`g
ahg ejg rhsd rmi`m i qhsga in qmg jeqgsief e qsein
gngsby.
Rhsd ahng : e|gsebg fhea } gfhnbeqihn
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Pwaagnfy Eppfiga Fhea
Rhsd ahng : _ W : _waaf(GW : 3waaEf(G
3
waaEf(G : _
waaf(G
waa : : 3b -b : bseawef)
Ijpe`q Fheainb
r-m $ f) : 3ijpe`qEf(Gr-m $
f) : 3iEf
3i * i * rm : ?3i * i * : ? -Uweaseqi` Guweqihn)
i : T 5 $ Z -Ngbfg`q |g shhq)
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Mesang Qgq
Qmg mesang hl e jeqgsief i iq sgiqen`g qh pgngqseqihn
wnags e fh`efi{ga psgwsg hs sgiqen`g qh ecseihn. Qmg jhq
`hjjhn mesang qgq esg;
i) Csingff mesang qgq
ii) Sh`drgff mesang qgqiii) \i`dgs mesang qgq
5. Csingff Mesang qgq
Qmi i e jgqmha hl inagnqeqihn mesang. Qmi jgqmha wg
qggf hl 5?jj aiejgqgs e inagnqgs. Qmg inagnqgs i lisq pe`g
wphn qmg wsle`g rmhg qmg mesang i qh cg jgewsga ena
qmgn e bseaweffy in`sgeinb fhea hl 0??? dbl i eppfiga wphn qmg
inagnqgs. Rmgn qmg fhea i sgjh|ga& en inagnqeqihn i fglq wphn
qmg wsle`g. Il qmg jeqgsief i mesa& inqgea hl qggf ceff& e
qwnbqgn `esciag inagnqgs i wga. Lhs hlqgs jeqgsief& e fhrgs
fhea hl 7?? dbl i eppfiga qh e|hia |gsy aggp inagnqeqihn.
Qmg aiejgqgs hn inagnqihn i jgewsga cy e fhr phrgs
ji`sh`hpg.
Csingff mesang nwjcgs -CMN) : 3 _ ( - A -A * -A3 * a3)5(3))
rmgsg
_ : fhea hn qmg inagnqinb qhhf -db)
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A : aiejgqgs hl qggf ceff -jj)
a : jgewsg aiejgqgs eq qmg sij hl qmg ijpsgihn -jj)
Qmg `ef`wfeqga |efwg hl C.M.N jey me|g fibmq gsshs cg`ewg hl
gfeqi` sg`h|gsy rmi`m qedg pfe`g elqgs qmg sgjh|ef hl fhea.
Lhs mesags jeqgsief gfeqi` sg`h|gsy i bsgeqgs qmen lhs hlqgs
jeqgsief.
_sg`ewqihn;
5.Qmg qgq mhwfa nhq cg pgslhsjga hn qmin pg`ijgn.3.Ijpsgihn -inagnqeqihn) mhwfa jedg qhh `fhg qh qmg
gabg hl e pg`ijgn.
0.Qmgsg mhwfa cg pshpgs bep cgqrggn qrh w``gi|gijpsgihn.
1.Qmg Csingff qgq mhwfa cg pgslhsjga hn jhhqm& lfeqpg`ijgn lshj rmi`m aisq ena `efg me|g cggn `fgenga.
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Ea|enqebg;
5.Pwsle`g psgpeseqihn i nhq h `siqi`ef e qmgg in Sh`drgffqgq.
3.Iq sgwfq `hssgfeqg rgff riqm qgnifg pshpgsqig.0.Qmg ijpsgihn jeag cy qmg Csingff je`ming i fesbg
gnhwbm qh bi|g e leisfy sgpsggnqeqi|g mesang& rmi`m esg
nhq hlqgn cy jeff hlq phq jeff mesa phq.
Fijiqeqihn;
5.Pi{g hl qmg inagnqeqihn pshaw`ga i fesbg h iq i ijifes qhagqsw`qi|g qgq.
3.Qmg Csingff qgq i gnqisgfy sgfiecfg.0.Qgq guwipjgnq i mge|y ena cwfdy.
3. Sh`drgff Mesang qgq
Sh`drgff qgqgs wg jeff pgngqseqhs ena jeffgs fhea qmen
ahg qmg Csingff qgqgs. In qmi qrh qypg hl inagnqgs i.g. e Csefg
inagnqgs in lhsj hl 53? agbsgg aiejhna `hng hs qggf ceff hl
5(5< ena 5(= in`m aiejgqgs esg wga Sh`drgff mesang i
jgewsga en hn esciqsesy `efg in rmi`m mesang nwjcgs i
in|gsgfy pshphsqihnef qh qmg agpqm hl pgngqseqihn.
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Qmg
pg`ijgn i
pfe`ga hnqmg en|if hl
qmg je`ming
ena qmgn e jinhs hl 5? dbl i eppfiga hn qmg pg`ijgn qmshwbm
qmg inagnqgs. Qmi jinhs fhea mgfp qh geq qmg pg`ijgn. Qmgn
qmg aief inai`eqhs i gq eq {gsh ena qmgn e jekhs fhea hl
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