Full resolution (JPEG) - On this page / på denna sida - Strength of Materials - Crushing strength
<< prev. page << föreg. sida << >> nästa sida >> next page >>
Below is the raw OCR text
from the above scanned image.
Do you see an error? Proofread the page now!
Här nedan syns maskintolkade texten från faksimilbilden ovan.
Ser du något fel? Korrekturläs sidan nu!
This page has never been proofread. / Denna sida har aldrig korrekturlästs.
STRENGTH OF MATERIALS. 225
PX C
^ 1 ~ P + %CX A
Pi = Corrected breaking load of column.
C= Crushing strength of material (see Table No. 26).
A = Metal area of column in square inches.
Important.— Applying the last formula, the result, Pi,
must always be smaller than P.
Table No. 27 was calculated by the following formulas
:
( 36000
)
Column I. Safe Load = 0.1 X < , J 2 \ (
I
1 + (^ X 0.00025)
J
t 36000 X 0.07031 ^
Column II. Safe Load = 0.1 X < ^ \/ L2
x o 00025 \
36000
Column III. Safe Load = 0.1 X J.
, Z2
x 0004
D2
’
" )
36000 X 0.07031
Column IV. Safe Load = 0.1X I
1
, L2
x qq^x
80000
Column V. Safe Load = 0.1 X < \ _f_
r^_ x 0.0025 )
( ^ D2
80000 X 0.07031 j
Column VI. Safe Load = 0.1 X j i -f ( J^
2
. x 0.0025 \ (
(
80000
Column VII. Safe Load = 0.1 X ]
;
J%
1 +(^X 0.0035)
( 80000 X 0.07031
Column VIII. Safe Load = 0.1 X \
’
72 x
/ 1 + (±- X 0.0035 )
D2
5000
Column IX. Safe Load = 0.1 X \ -. .
, L2
w A AA ,
x
I
2
+ (^X0- 004
)
S
1
5000 X 0.07031
Column X. Safe Load = 0.1 X ] -± \
/ j^l. x 004 "i (
<< prev. page << föreg. sida << >> nästa sida >> next page >>
