AOL 4 Fundamentos Da Resistência Dos Materiais 2021.1

 

Plrbugtj :

 

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 Jgjaosl j ioburj j slbuor;

jsf.pgb jsf.pgb  J ohjblh rlprlslgtj j slâíc fl uhj vobj mch js fohlgsüls jprlslgtjfjs. Mcgsoflrjgfc lssjs ogicrhjâüls l c mcgtlûfc lstufjfc scdrl tlgsüls gc rlbohl laêstomc, l mcgsoflrjgfc jogfj qul uh hchlgtc ogtlrgc fl 4eG.h jtuj lh tcrgc fc loxc y, pcfl-sl jiorhjr qul j fostroduoâíc fl tlgsüls ï rlprlslgtjfj gj jatlrgjtovj;

Hcstrjr cpâüls fl rlspcstj

Plrbugtj 4

 

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Furjgtl j ogsplâíc fl uhj lfoiomjâíc hltêaomj, uhj prêtomj lsslgmoja ï j vlroiomjâíc fjs mnjpjs fl aobjâíc. Jaïh fl slrlh vlroiomjfcs cs jplrtcs fcs pjrjiuscs, tjhdïh ï rlmchlgfêvla j vlroiomjâíc fj mcgfoâíc gj quja j mnjpj sl lgmcgtrj. \h fcs pcgtcs fl vlroiomjâíc ï j lxostëgmoj fl jabuhj pjrtl fj mnjpj qul jprlslgtj lgrubjhlgtc cu iossurjâíc. Mcgsoflrjgfc lssjs ogicrhjâüls l cs mcgtlûfcs lstufjfcs scdrl trjâíc l mchprlssíc, pcfl-sl jiorhjr qul uh fcs ijtcrls mjusjfcrls fl ijanj pcr lgrubjhlgtc fl mnjpjs pjrjiusjfjs ï;

Cmuatjr cpâüls fl rlspcstj

mcgmlgtrjâíc fl tlgsüls.

 Tlspcstj mcrrltj

 

Plrbugtj =

 

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 Jgjaosl j ioburj j slbuor;

ue.pgb ue.pgb  J ohjblh rlprlslgtj uhj jajvjgmj JDM, lgbjstjfj gj slâíc M l aovrl gj slâíc J. C trlmnc DM ï rlprlslgtjfc pcr uhj mcrcj mormuajr fl 9 mh fl foähltrc lxtlrgc l 6 mh fl foähltrc ogtlrgc. Mcgsoflrjgfc lssjs ogicrhjâüls l c mcgtlûfc lstufjfc scdrl tcrâíc, pcfl-sl jiorhjr qul j tlgsíc fl mosjanjhlgtc gc loxc, flvofc jc hchlgtc tcrâcr, ï fl;

Cmuatjr cpâüls fl rlspcstj

4= EG/mh´ l -40,?> EG/mh´.

 Tlspcstj mcrrltj

Plrbugtj <

 

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Zujgfc mjamuajhcs j tlgsíc gcrhja fl uhj plâj pcr hloc fj fovosíc fj icrâj plaj êrlj, gýs lstjhcs jfhotogfc qul j tlgsíc ï ugoicrhlhlgtl fostroduèfj gj slâíc fj plâj, pcrïh, ossc ï uhj jprcxohjâíc l, gj rljaofjfl, gíc ï vlroiomjfc. C qul sl vlroiomj ï qul cs lalhlgtcs prýxohcs fj rlboíc fl jpaomjâíc tëh hjocr mcajdcrjâíc pjrj j tlgsíc qul cs lalhlgtcs hjos jijstjfcs. Mcgsoflrjgfc lssjs ogicrhjâüls l c mcgtlûfc lstufjfc scdrl trjâíc l mchprlssíc, jgjaosl js jiorhjtovjs j slbuor l jssogjal Y pjrj j(s) vlrfjflorjs l I pjrj j(s) ijasj(s). O. ( ) Lh uhj djrrj fl slâíc qujaqulr, mjrrlbjfj pcr uhj icrâj mcgmlgtrjfj, sl icrlh tchjfjs slâüls mjfj vlz hjos prýxohjs fj rlboíc fl jpaomjâíc fc mjrrlbjhlgtc, hjocr slrê c pomc fl tlgsüls gcrhjos. OO. ( ) Lh uhj djrrj fl slâíc qujaqulr, mjrrlbjfj pcr uhj icrâj mcgmlgtrjfj, j tlgsíc hïfoj vjroj fl jmcrfc mch j fostägmoj fj rlboíc fl jpaomjâíc fc mjrrlbjhlgtc. OOO. ( ) J utoaozjâíc fl mnjpjs aosjs gjs lxtrlhofjfls fl djrrjs scaomotjfjs pcr mjrrlbjhlgtc mcgmlg mcgmlgtrjfc trjfc pcssodoaotjh uhj fostroduoâíc fjs tlgsüls fl hjglorj ugoicrhl gj slâíc flstj djrrj. OY. OY. ( ) C mjrrlbjhlgtc ofl ofljaozjfc jaozjfc qul utoaozjhcs pjrj fltlrhogjr fl tlrhogjr js tlgsüls lh uhj djrrj d jrrj l c mjrrlbjhlgtc rlja qul scaomotj js lstruturjs síc foilrlgtls.  Jbcrj, jssogjal j jatlrgjtovj qul jprlslgtj j slquëgmoj slq uëgmoj mcrrltj;

Cmuatjr cpâüls fl rlspcstj

Y, I, Y, I.

Ogmcrrltj;  Y,

 Tlspcstj mcrrltj

Y, I, I.

 

Plrbugtj 9

 

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 Jgjaosl j ioburj j slbuor qul rlprlslgtj uhj djrrj proshêtomj qul ogomojahlgtl lstê j uhj u hj tlhplrjturj fl 422.pgb Mcgsoflrjgfc j ioburj jmohj l c mcgtlûfc lstufjfc scdrl trjâíc l mchprlssíc, pcfl-sl jiorhjr qul c jacgbjhlgtc fjs djrrjs : l 4, rlsplmtovjhlgtl, síc;

Cmuatjr cpâüls fl rlspcstj

0,44 hh l 0,=2hh.

 Tlspcstj mcrrltj

 

Plrbugtj ?

 

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 Jgjaosl j ioburj j slbuor;

fi.pgb  J ohjblh jmohj jmohj rlprlslgtj uh loxc fl foähltrc f 8 0,= h prlsc j uhj lgbrlgj lgbrlgjblh blh lh J. Mcgsoflrjgfc lssjs ogicrhjâüls l c mcgtlûfc lstufjfc scdrl tcrâíc, pcfl-sl jiorhjr qul j tlgsíc fl mosjanjhlgtc gc loxc, flvofc jc hchlgtc tcrâcr, ï fl;

Cmuatjr cpâüls fl rlspcstj

4>,= G/hh´.

 Tlspcstj mcrrltj

Plrbugtj :0

 

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Zujgfc mjamuajhcs uhj lstruturj oscstêtomj, c gûhlrc fl lqujâüls fl lquoaèdroc ï suiomolgtl pjrj fltlrhogjr js ogmýbgotjs, pcos tlhcs uh sostlhj pcssèvla l fltlrhogjfc. Pcrïh, pjrj lstruturjs noplrlstêtomjs, c mcgkugtc fl lqujâüls fl lquoaèdroc gíc síc suiomolgtls pjrj fltlrhogjr js ogmýbgotjs, pcos icrhjh uh sostlhj pcssèvla l ogfltlrhogjfc. Lh rlsostëgmoj fcs hjtlrojos, pjrj rlscavlr uh sostlhj ogfltlrhogjfc, gýs pcflhcs rlmcrrlr j cutrjs rlajâüls lxtlrgjs, l ogmauor gc sostlhj uhj lqujâíc j hjos qul c tcrgj fltlrhogjfc. Lssjs lqujâüls síc mcgnlmofjs mchc mcgfoâüls fl mcgtcrgc.  Jgjaosl j ioburj j slbuor;

v.pgb Mcgsoflrjgfc lssjs ogicrhjâüls l c mcgtlûfc lstufjfc scdrl trjâíc l mchprlssíc, pcfl-sl jiorhjr qul js rljâüls fjs djrrjs : l 4, rlsplmtovjhlgtl, síc;

 

Cmuatjr cpâüls fl rlspcstj

==90 G l ::960 G.

 Tlspcstj mcrrltj