Zadanie 4, szkoła, wytrzymałosc
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3U]\NáDG:\]QDF]DQLHSU]HPLHV]F]H
ZXNáDG]LHVWDW\F]QLH
wyznaczalnym
:\]QDF]\üSU]HPLHV]F]HQLHVZRERGQHJRZ
]áDNUDWRZQLF\3U]HNURMHSU
WyZLFKGáXJRFL
RUD]PRGXá<RXQJDRSLVDQHVQDU\VXQNX'RREOLF]HSU]\MüQDVWSXMFH]DOH*QRFL
A
1
=A, A
2
=2A, E
1
=E
2
=E.
2EOLF]HQLDSU]HSURZDG]LüGODQDVWSXMF\FKGDQ\FKOLF]ERZ\FK
P = 1000N,
A = 0.0001 m
2
,
l = 1m ,
E = 2.1 10
11
Pa.
2l
l
l
A
1
, E
A
2
, E
P
5R]ZL]DQLH
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2
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x
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1.
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1
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, l
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=
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ównania fizyczne
PDM
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2
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Zapiszemy teraz równania geometryczne
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i
sprowadza je do postaci:
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=
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=
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P
=
1
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=
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P
×
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P
P
LFDáNRZLWHSU]HPLHV]F]HQLH/
×
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m
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1.
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3.
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