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August 24, 2018 | Author: Chichofaim | Category: Fracture Mechanics, Mechanics, Materials Science, Nature, Building Engineering
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Xfaföe hmc f cga mjxe Xfaföe hmc  rteh}oxe

1

h >2 f cga mjxe h >2 rteh}oxe

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RTGJOGRGE_ HM CF OEJAGJ]OGßJ ․ Ces hmimoxes v}m çsxm resmm* ․ H}tfjxm mc rteomse hm ietafogÿj# agjfhe w afjmle rtmyge mj mc agjmtfc sm r}mhmj ietaft ktgmxfs* ․ Mc agjmtfc msxæ oejsxgx}ghe ret msrmogms hgsmagjfhfs hm hgimtmjxm oearetxfagmjxe amoæjgoe*

Xehfs msxfs nmxmtekmjmghfhms mj mc agjmtfc# foxüfj oeae oejomjxtfhetms hm msi}mt|e# v}m oejccmyfj f v}m çsxm sm oearetxm oeae }j afxmtgfc oearcmxfamjxm itækgc# o}wf tmsgsxmjogf amoæjgof ms i}jogÿj hm cfs oftfoxmtásxgofs hm cfs nmxmtekmjmghfhms*

RTGJOGRGE_ HM CF OEJAGJ]OGßJ

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RTGJOGRGE_ HM CF OEJAGJ]OGßJ XGRE HM OFTKF FRCGOFHF

AMOFJG_AE HM ITFOX]TF

HG_XTGD]OGßJ HM XFAFÖE_ HM RFTXÁO]CF

M_XFCCGHE RET GARFOXE

I]MT\F_ HM XTFOOGßJ FRCGOFHF_ F FCXF YMCEOGHFH

OEARTM_GßJ

OEARTM_GßJ

NEAEKMJME RFTXÁO]CF_ KT]M_F_ W FCK]JE_ IGJE_

FDTF_GßJ RET ITGOOGßJ

M_I]MT\E OETXFJXM _]RMTIGOGFC

IGJE_ W KT]M_E_

XMETÁF HM CF OEJAGJ]OGßJ

XMETÁF HM CF OEJAGJ]OGßJ

XMETÁF HM CF OEJAGJ]OGßJ

GJHMRMJHGMJXM

HMC XGRE HM OFTKF FRCGOFHF # CF ITFOX]TF HM CF_ RFTXÁO]CF_ _M HÆ RET CF_ I]MT\F_ HM XTFOOGßJ HGTMOXF E GJHGTMOXF V]M XGMJHMJ F _MRFTFT CE_ ÆXEAE_ V]M CF OEJ_XGX]WMJ *

XMETÁF HM CF OEJAGJ]OGßJ

XMETÁF HM CF OEJAGJ]OGßJ FJXM CF FRCGOFOGßJ HM OFTKF_ HM XTFOOGßJ ]J AFXMTGFC HMDMTÁF M^RMTGAMJXFT ]J OEARETXFAGMJXE MCÆ_XGOE FOEARFÖFHE HM ]J OEARETXFAGMJXE RCÆ_XGOE # O]WF AFKJGX]H HMRMJHMTÆ HM CF ITFKGCGHFH HMC AFXMTGFC *

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XMETÁF HM CF OEJAGJ]OGßJ MJXTM AFWET _MF MC XFAFÖE HM ]JF RFTXÁO]CF AFWET _MTÆ CF RTEDFDGCGHFH HM EO]TTMJOGF HM HMIMOXE_# RET CE XFJXE CF MJMTKÁF JMOM_FTGF RFTF CF ITFOX]TF _MTÆ AMJET*

RET MC OEJXTFTGE F AMHGHF V]M HG_AGJ]WM MC XFAFÖE HM RFTXÁO]CF CF RTEDFDGCGHFH HM EO]TTMJOGF HM HMIMOXE_ HG_AGJ]WM W RET CE XFJXE _M TMV]MTGTÆ HM AFWET MJMTKÁF RFTF RTEH]OGT _] ITFOX]TF# NF_XF XFC R]JXE V]M CF MJMTKÁF JMOM_FTGF R]MHM NFOMT_M GJIGJGXF# M_XE R]MHM _MT FXTGD]GHE F CF HG_XTGD]OGßJ NEAEKÇJMF HM M_I]MT\E_ W F CF HMIETAFOGßJ RCÆ_XGOF V]M R]MHM M^RMTGAMJXFT GJOC]_E MJ CF R]JXF HM CF KTGMXF* MC XFAFÖE HM RFTXÁO]CF FC V]M EO]TTM M_XM IMJßAMJE M_ OEJEOGHE OEAE CÁAGXM HM AECGMJHF*

XMETÁF HM CF OEJAGJ]OGßJ RFTF

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XMETÁF HM CF OEJAGJ]OGßJ ν  r

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XMETÁF HM CF OEJAGJ]OGßJ _G

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⎐  h   ⎚ ∄ν 2 ≍ ∄⎓ j ⎕ ⎑ h   ⎢

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XMETÁF HM CF OEJAGJ]OGßJ

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ν  T

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HM HEJHM< @T M_ CF OEJ_XFJXM HM TGXXGJKMT# ^I M_ MC HGÆAMXTE HM RFTXÁO]CF IGJFC ^G M_ MC HGÆAMXTE GJGOGFC HM RFTXÁO]CF CF OEJ_XFJXM HM TGXXGJKMT HMRMJHM HM CF IETAF HM CF RFTXÁO]CF # MC XGRE HM AFXMTGFC# CF OFJXGHFH HM HMIMOXE_ MJ MC AFXMTGFC W CF MIGOGMJOGF HM CF_ I]MT\F_ FRCGOFHF_ RFTF CF OEJAGJ]OGßJ *

XMETÁF HM CF OEJAGJ]OGßJ RET

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⎐  h   ⎚ 1 @ `  cj⎓⎓ g ⎕⎕ ⎑ h e  ⎢

M_XF MO]FOGßJ M_ EDXMJGHF F RFTXGT HM CF GJXMKTFOGßJ HM CF M^RTM_GßJ KMJMTFC

⎐  h   ⎚ ∄ν 2 ≍ ∄⎓ j ⎕ ⎑ h   ⎢

HM HEJHM _MKÜJ @GO@ j16

XMETÁF HM CF OEJAGJ]OGßJ

HFHF_

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DEJH RCFJXMß CF _GK]GMJXM ν 

1

M^RTM_GßJ MARÁTGOF <

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ν1 MJMTKÁF OEJ_]AGHF .L% oa4' N1H]TM\F AE_N HMC AGJMTFC

XMETÁF HM CF OEJAGJ]OGßJ OEAE

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⎐  h   ⎚ ∄ν 2 ≍ ∄⎓⎓ j ⎕⎕ ⎑ h   ⎢

j16#= HM HEJHM j16#= ⎐  ⎓  Me 1 @D ⎓⎓ ⎑ 

6 h >2 rteh 

 ⎚ ⎕ ∔ ⎕ h >2 f cga mjxe ⎕  ⎢ 6

⎐  ⎓ [  1 62[g ⎓⎓ ⎑ 

6 h >2 rteh 

 ⎚ ⎕ ∔ ⎕ h >2 f cga mjxe ⎕  ⎢ 6

ÁJHGOM HM XTFDFLE.[G' M_ CF TMCFOGßJ MJXTM CF IFOGCGHFH OEJ V]M ]JF RFTXÁO]CF M_ TMH]OGHF HM XFAFÖE W CF TM_G_XMJOGF HM CF RFTXÁO]CF AG_AF * MC ÁJHGOM HM XTFDFLE HMDMTÁF _MT GJHMRMJHGMJXM HMC XFAFÖE HM RFTXÁO]CF# _GJ MADFTKE RET MIMOXE_ RTEDFDGCÁ_XGOE_ M_XM YFTÁF OEJ MC XR* MC [G# M_ ]XGCG\FHE RFTF MYFC]FT RFTÆAMXTE_ HMC RTEOM_E OEAE< XGRE HM MV]GRE# YMCEOGHFH# AFXMTGFC HM IFDTGOFOGßJ HMC MV]GRE# MXO*

XMETÁF HM CF OEJAGJ]OGßJ MJ MC RTEOM_E HM OEJAGJ]OGßJ M_ I]JHFAMJXFC OEJEOMT CF TMCFOGßJ MJXTM CF MJMTKÁF FRCGOFHF RFTF CF ITFOX]TF HM CF_ RFTXÁO]CF_ W MC XFAFÖE HM CF_ RFTXÁO]CF_ EDXMJGHE *

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NF REHGHE M_XFDCMOMT V]M MJ M_XM RTEOM_E CF AFWET RFTXM HM CF MJMTKÁF _M RGMTHM RET MIMOXE HMC I]JOGEJFAGMJXE HM CE_ MV]GRE_ MJ CE_ O]FCM_ _M RTEH]OM CF TMH]OOGßJ HM XFAFÖE .XTGX]TFHETF_ W AECGJE_'*

MJ

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XTGX]TFOGßJ Mj cf xtgx}tfogÿj cf itfox}tf hm cfs rftxáo}cfs sm hf rtgjogrfcamjxm ret cf frcgofogÿj hm i}mt|fs hm oeartmsgÿj<

XTGX]TFOGßJ

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XGRE_ HM V]MDTFHETF_ MCMOXTEMJMTKÇXGOF_

]xgcg|fhf oeae amofjgsae rtmyge f cf xtgx}tfogÿj rtgaftgf# rftf cf itfox}tf hm teofs hm sedtmamhghf* ]xgcg|f rexmjogf hm nfsxf 4=2 @{*

XTGX]TFHETF_ HM V]GLFHF_

HEDCM OEJM^GßJ FTXGO]CFHF

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RGYEXM MCMYFHE

XTGX]TFHETF_ HM V]GLFHF_

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XTGX]TFHETF_ HM V]GLFHF_

M^OMJXTGOE MCMYFHE

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XTGX]TFHETF_ HM V]GLFHF_

XTGX]TFHETF HEHKM

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XTGX]TFHETF_ KGTFXETGF_ V]MDTFHETF_ HM OFARFJF

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XTGX]TFHETF_ KGTFXETGF_ XTGX]TFHETF_ HM OEJE

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