Page 93 - เรื่อง อุปกรณ์ทดสอบการโก่งของคาน

Basic HTML Version

1M'
V
iii1JlLHIQfnJ
lLCl~
M iii1J
llJllJ\.Jvl~~~111hi~1::(J~'VI1~
x
~ln~~l1J~flJ
A
~~
~
' d '"
'J/
<V
"'"
'J/
<V
::.di
0
,., ""
I!.:I
"<OJ
IlJ\.Jfl1'V1~1J~ml~::111 1~(Jll1f11\.J~n~Vl1J1Jn'VI11\.J1~~\.J\.J9!~~::'VIl111m~lLl ~!\l1J1JIW~ 11JllJ\.J~~~
~\.J ~~l,J
tree body
l\.JlU~
2.26
('IJ)
l\.Jm~~fl1\.JQ~~1JQi\.J(\'mvmlJ'.!ClLv1 m~11lJmlJmn~~
~~v11J~t1'J\.Jt;!\.J6 ~~~:: ']v1
v
(213)
M
+
F,(X-a)
+
F
2
(X-b) - RA
=
0
M
(2.14)
fi1'IJ1J~lLl~IQ1J\.J
V
lLCl~ llJllJ\.Jvl~~
M
~lnrrlJml
CD
IW::@
Q1l1l1 flJ1JQiwli1~
b<x<c
Lvi lJ
l.J
({
1~t)~nl'j
'Vl'i
l1Jfil'\J'f)~!l
'j
~1;ij
V'ULL-a::
llJllJlJ~~fl~l1,j'l~l1g'U ~~~
1U
1tJl1
'j
':]~lJln'j::V11vlfl
fl1\.J~~~IU~(J\.JLU ~iM'.i~
free
body
~l1u1.imftJ mh~~HfflJm~m~fflJ'.!Cl'VI1~ff(l~6fnff~1;n
Irl!lLv1fi
1'IJ!l~
lL1
~l
Q1J\.J lLCl::
llJllJtJvl~~'IJ!l~1l'!Cl~'lh~lLc11~ff1lJll
(l1.J
1LUl:UtJ\.Jm
lVl'IJ!l~
m
~IQ1J\.JlW:: llJllJ1.Jvl.i~
Lv1
1~(J1M'lLn1.J
x
lL'VItJ.J111mj~'IJ!l~l1U1.i~'IJ!l~fl11.J ri1tJ'lJ1.J1~'IJ!l~
""1
.t""
",..
::
I!.:I
"""
&
c:::
lLH!\l!ltJllfl~ llJllJtJ~~~~::1l'VI\.J1~~1(JllntJ
y
\1::\.JtJll~\.JmVl'IJ1J~lLH!\l!ltJlLfl:: llJllJtJl'll'll'l~~llJ\.J
nn
llffl'l~~~nmU~(J\.JlIUfl~'IJ\.JWI'IJ1J~m ~IQ!l\.Jlm~ IlJIlJtJvl~~~l1U1.i~ i~
'1
']Ul'lllJfI11lJtJ11
""1
'i'
"OJ
.dill
Vd
0
i
~,
'"
'IJ1J~fl1tJ ~lnlL~tJmVl'IJ1J~UH!\l1J\.JlLCl~ IlJIlJtJl'll'l~'VII~n\J::'VIl 11'V111lJfl1"J;~l'/~'IJ!l~lLH!\l!l\.Jlm~
IlJllJtJvl~I'l~lii~~tJi\.Jfl1\.J,f\.J I'lCl!l~~\.J.J111l1U~~lii~fi1"J;~l'/~1l1~1ti'v11(J ~~\J::I~\.JU1:;
lu'l!,r
1
\.J mlVi
~::fi
1tJ1Ul111f111lJlf11.J
~~llCl:;fI11lJlf1\.JlQ!l\.J
1
\.J fl1\.J.!!l ']U
n . .J
11111U~m ~IQ!ltJlJln~l'/~
i \.J
m1111fi1Im::.J1lLl1U~'IJ!l~m ~1i11JtJ
"J;
~l'/~,ftJ ~~.;'!l~
rr!
1~11~Uf11W'tlil~1!
'j
~1
Q
flU
~~;fl'W'j
1::
~1,j~1n
fil'ifllU1W
11iilfl~ ~::1Je
fl
ill1111
'j
~
1
fi
tl'U
"J
-1
"!~~
lii~~1.J~ :;lii~
Ul .
~i~'IJ 1J~fl1\.J ,f1.J ll.!l~u~,
'1
LUUli'1iJn\J:;lii~~1.J~lJ~nUl~~5!l~flJ'lJ1J~fl1\.J,f\.J
1~1.Jri1H 1 11tY
'IJ.
1'i1mllj~ f1J llJllJHvl~~lJ ~l'/~ ltJml~~:;l11f111lJlf1tJ~~ lmmdJfI11lJlh1'J1.J ~\J::
.;'
tl~ l-tlfi11lJIIJ1Jvlvl~~i1'IJ1.J1~lJ ~l'/~ (fi 11111.JlJ1nl1~tlCllJlJln~l'/~) .J 1umj~ ~'IJ1J11'l'IJtl~
llJlJJ1H'l
vlA"J;
~l'!" im\J~ 111 'lv11Au nl'l 1-tl'li1J!Y~m~vl~'!1J
']u Q
fil1JJ1JJ1.J .lv1""J;~<r"~::ln~~H
Ul .
.J11111U~~i1fil'IJ lNUHlii1J1au~(Jlj\Jln
+
l~hJ
-
fi 11 lJlmlvlYi~~ 1l'/~ ~::ln~~H
Ul .
.J111l1U ~~)jfi1'IJ tl ~UH1Q1J1HU~tJ 1.J ~ln
- JJ111l11 '
25