Avance de Angulo de Friccion
December 23, 2022 | Author: Anonymous | Category: N/A
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AIBGOMBG CI RYIJDR MM
YOMVI^RMCGC LDRI BG^JDR AG^MGSIEYM
GOEYJD CI F^MBBMDO MOSI^OG
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GOEYJD EYJD CI F^M F^MBB BBMMDO MMO OSI^OG I^OG
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AIBGOMBG CI RYIJDR MM
YOMVI^RMCGC LDRI BG^JDR AG^MGSIEYM
MOS^DCYBBMDO Prdnjiags ci istgnmjmcgc gsdbmgcds g eidaibçombgs prdcubio tmiapds od prdcubtmvds y bdstds gcmbmdogjis. Jds adcijds eidaibçombgs gyucgo g amtmegr y priviomr isds prdnjiags, pird riqumirio ci cgtds ci prdpmicgcis aibçombgs qui cinio sir ixgbtgs y pribmsgs. Gbtugjaioti, ij çoeujd ci frmbbm mbbmòo òo ‒ uog uog ci pr prdp dpmmicgc icgcis is ‒ is uod uod ci cijjds br bráátmbd tmbdss bdo bdo agyd agydr r mobirtmcuanri. Ij çoeujd ci frmbbmòo motirog (gfm), is dntiomcd prmobmpgjaioti g pgrtmr ci pruings trmgxmgjis rigjmzgcgs g auistrgs bmjáocrmbgs ribdjibtgcgs io jg zdog ci motirís. Cmbhgs pruings ci jgndrgtdrmd prdpdrbmdogo puotds ci cgtds cmsbritds io tdcg jg sibbmòo cij pdzd eioirgocd bdosmed ergocis bdstds y prdnjiags io jg riprisiotgtmvmcgc ci jg rdbg rijgbmdogcds bdo jg ixtrgbbmòo y trgtgamiotd ci jg amsag. Bdad sdjubmòo g isti prdnjiag cmfiriotis gutdris pjgotigo aítdcds pgrg jg aicmbmòo ci, bdad vgjdris cij GFM bdostgotis pgrg griogs y grbmjjgs.
2
AIBGOMBG CI RYIJDR MM
YOMVI^RMCGC LDRI BG^JDR AG^MGSIEYM
GOEYJD CI F^MBBMDO MOSI^OG Ij çoeujd ci frmbbmòo motirog, si iobuiotrg istribhgaioti rijgbmdogcd bdo jg frmbbmòo motiro mot irogg ci cijj agt agtir irmgj mgj,, cif cifmom momcg cg bdad bdad jg risms rismstio tiobmg bmg gj cisjmz cisjmzga gamio miotd td bg bgusg usgcd cd pdr jg frmbbmòo qui hgy iotri jg supirfmbmi ci bdotgbtd ci jgs pgrtábujgs y su ciosmcgc. Jg frmbbmòo motirog istç cifmomcg pdr ij çoeujd buyg tgoeioti is jg rijgbmòo iotri jg fuirzg qui rismsti rismsti gj cisjmzgamiotd f” f”b, b, g jd jgred ci uo pjgod. Iobdot Iobd otrg rgoc ocdd ij çoeu çoeujd jd ci frmb frmbbm bmòo òo moti motiro rogg y ij bd bdif ifmb mbmi miot otii ci frmb frmbbm bmòo òo mo moti tiro rogg rijgbmdogcds rijgbmdogc ds ci jg smeumioti fdrag.
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Brmtirmd ci adhr-Bdujdan io ij pjgod ci jds isfuirzds isfuirzds ci bdrti y odragj.}
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AIBGOMBG CI RYIJDR MM
YOMVI^RMCGC LDRI BG^JDR AG^MGSIEYM
AGEOMSYC CIJ GOEYJD CI F^MBBMDO Ri rifmiri gj çoeujd ci rismstiobmg gj rdzgamiotd, cipioci cij istgcd gbtugj ci jg tiosmòo io ij buirpd rdbdsd. • Eiderçfmbgaioti si riprisiotg bdo uo çoeujd ci jg tgoeioti io jds bárbujds ci Adhr bdostrumcds pdr ij üjtmad istgcd ci tiosmòo. • Ij vgjdr ci φ cibribi ergcugjaio ergcugjaioti ti bdo ij guaiotd cij vgjdr ci jg tiosmòo ς. • Rm si ixbici ij ríemaio ríemaio istçtmbd (mombmd ci jg cifdragbmòo cifdragbmòo pjçstmbg) • φ 1 0 y ij vgjdr cij çoeujd ci frmbbmòo frmbbmòo motirog si ciodtg bdo ij vgjdr φ Gsdbmgcd bdo vgjdr ci tiosmòo ς 1 0.
AISDCDR PG^G JG CISI^AMOGBMDMO CIJ GOEYJD CI F^MBBMDO MOSI^OG Jg ci citir tiramo amogbm gbmòo òo ci cijj çoeuj çoeujdd ci frmbb frmbbmòo mòo mot motiro irogg si ng ngsg sg prmobm prmobmpg pgjai jaioti oti ci cgt cgtds ds dntiomcds ci iosgyds ci jgndrgtdrmd bdodbmcds bdad iosgyds trmgxmgjis, io jds qui si bgrgbtirmzg ij bdapdrtgamiotd tiosmòo-cifdragbmòo ci jg rdbg, piramtmiocd gsá qui si ilibuti uoijistucmd citgjjgcd quipdr puicio jg istgnmjmcgc jg amsag io pdzd smo iangredciodjgsisprdpmicgcis jg üombg fdrag jg bugjgfibtgr si puici citiramogr ci GFM. 9
AIBGOMBG CI RYIJDR MM
YOMVI^RMCGC LDRI BG^JDR AG^MGSIEYM
PG^GAIS^DR MOFJY]IOSIR MOFJY]IOSIR IO JG CISI^AMOGBMDO CISI^AMOGBMDO CIJ GOEYJD CI F^MBBMDO MOSI^OG
Ij çoeujd ci frmbbmòo motirog cipioci prmobmpgjaioti ci tris bgrgbtirástmbgs ci jg rdbg bdad jd sdo; cisjmzgamiotd iotri jds ergodsuog (qui eioirg frmbbmòo cinmcd (qui g jg bgpgbmcgc g jgsIj pgrtábujgs ci jg rdbg ci cisjmzgrsi sdnri dtrgs), ij rdcgamiotd 6
AIBGOMBG CI RYIJDR MM
YOMVI^RMCGC LDRI BG^JDR AG^MGSIEYM
sdo bgusgotis ci jg eioirgbmòo ci jg frmbbmòo cinmcd g rdtgbmòo ci jds ergods io jg istrubturg ci jg rdbg) tiomiocd mobmciobmg cmribtg io jg istmagbmòo.
GOEYJD CI ^IPD\D CI JDR RYIJDR
Iosgyd ci Bdrti Cmribtd
Ij iosgyd ci bdrti cmribtd bdosmsti io hgbir cisjmzgr uog pdrbmòo ci suijd, rispibtd g dtrg g jd jgred ci uo pjgod pjgod ci fgjjg pricitiramogcd pricitiramogcd aicmgoti jg gbbmòo ci uo uogg fuirzg ci bdrti bdr ti hdr hdrmzd mzdotg otgjj mob mobria riaiot iotgcg gcg,, ami amiotr otrgs gs si gpj gpjmbg mbg uog bgreg bgreg odragj odragj gj pjgod pjgod ci cijj advmamiotd.
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AIBGOMBG CI RYIJDR MM
YOMVI^RMCGC LDRI BG^JDR AG^MGSIEYM
g) Prmob Prmobmpm mpmd d cij iosg iosgyd yd ci bdrt bdrtii cmribtd cmribtd7 y puici riprisiotgrsi pdr jg ibugbmòo smeumioti< tf 1
b + ς o * te Φ
Fme. 9.>7 ^ijgbmòo iotri jds jds isfuirzds ci bdrti açxmad açxmad y jds isfuirzds isfuirzds odragjis. odragjis. Jg jáoig ribtg dntiomcg si bdodbi bdad Iovdjvioti ci fgjjg.
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AIBGOMBG CI RYIJDR MM
YOMVI^RMCGC LDRI BG^JDR AG^MGSIEYM
IORG]D CI BD^SI CM^IBSD OD^AG GRSA C2080-5> YNMBGBMÒO <
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0.000 0.820 0.=90 7.090 7.720 7.7=9 7.>90 7.209 7.260 7.330 7.3=0 7.998 7.670 7.660 7.506 7.599 7.800
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0.392 0.367 0.368 0.352 0.389 0.3=9 0.3== 0.908 0.979 0.9>0 0.929 0.999 0.963 0.958
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AIBGOMBG CI RYIJDR MM
YOMVI^RMCGC LDRI BG^JDR AG^MGSIEYM
BY^VG IRFYI^\D - CIFD^AGBMD CIFD^AGBMDO O >.9
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AIBGOMBG CI RYIJDR MM
YOMVI^RMCGC LDRI BG^JDR AG^MGSIEYM
IOVDJVIOSI CI FGJJG 2.0 ) > a b / e K ( ) > a b / e K ( I S O G S ^ D B D \ ^ I Y F R I
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AIBGOMBG CI RYIJDR MM
YOMVI^RMCGC LDRI BG^JDR AG^MGSIEYM
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AIBGOMBG CI RYIJDR MM
YOMVI^RMCGC LDRI BG^JDR AG^MGSIEYM
Iliapjd prçbtbd
Pgrg uog grbmjjg odragjaioti bdosdjmcgcg, jds smeumiotis sdo jds risujtgcds ci uog pruing Srmgxmgj criogcg< Prismòo ci bdofogamiotd io jg bçagrg 1 77> kO/a> Isuirzd cisvmgcdr io gjjg 1 759 kO/a> g) Iobuio Iobuiotri tri ij çoeujd çoeujd ci rm rmbbmò bbmòo oϙ Rdjubmòo Pgrg uo suijd odragjaioti bdosdjmcgcd, jg ibugbmòo ci jg iovdjvioti ci gjjg is '
σf 1 1ς tgo ϙ ( puistd qui b 1 0) Pgrg jg pruing Srmgxmgj, jds isuirzds iibvds prmobmpgjis agydr y aiodr io jg gjjg sdo< >
ς ' 71ς 71 ς 2 +( Γ ς c )f 177>+ 759 1>85 kO // a ] ς ' 21ς 2 177> kO / a
>
g. Ij bmrbujd bmrbujd ci Adhr Adhr y jg iovdjv iovdjvioti ioti ci ci gjjg si si auistrgo auistrgo io io jg feurg feurg 5.76, ci ci cdoci cdoci dntioiads sioϙ1 D sioϙ1
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AIBGOMBG CI RYIJDR MM
YOMVI^RMCGC LDRI BG^JDR AG^MGSIEYM
BDOBJYRMDOIR Ij ço çoeu eujd jd ci rdzg rdzgam amio iotd td moti motiro rodd d çoeu çoeujd jd ci frmb frmbbm bmòo òo is uog uog prdp prdpmi micg cgcc ci jds agtirmgjis ergoujgri ergoujgriss ij bugj tmioi uog motirpritgbmòo fásmbg siobmjjg, gj istgr rijgbmdogcd bdo ij çoeujd ci ripdsd d açxmad çoeujd pdsmnji pgrg jg piocmioti ci uo bdoluotd ci cmbhd agtirmgj ergoujgr. Io uo agtirmgj ergoujdsd bugjqumirg ij çoeujd ci ripdsd istç citiramogcd pdr jg frmbbmòo, jg bdhismòo y jg fdrag ci jgs pgrtábujgs pird pird io uo agtirmgj smo bdhismòo y cdoc cdocii jgs pgrtábujg pgrtábujgss sdo auy piqui÷gs piqui÷gs io rijgbmòo gj tgag÷d cij bdoluotd ij çoeujd ci ripdsd bdmobmci bdo ij çoeujd ci rdzgamiotd motirod. Is is ispi pibm bmgj gjai aiot otii ma mapd pdrt rtgo goti ti io ai aibç bçom ombg bg ci suij suijds ds pg pgrg rg ci citi tira ramo mogr gr tg tgot otdd jg bgpgbmcg bgpgbmcgcc pdrtgoti pdrtgoti bdad bdad jg rismstiobmg gj cisjmzgamiotd ci uo tirriod griodsd.
79
AIBGOMBG CI RYIJDR MM
YOMVI^RMCGC LDRI BG^JDR AG^MGSIEYM
NMNJMDE^GFMG
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