Stl cnx - weld - solutions to design of weldments - blodgett
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0 The serviceability of a product or structure utilizing this type of Information Is and. must
be the sole responsibility of the builder/user. Many variables beyond the control of The
James F. Lincoln Arc Welding Foundation or The Lincoln Electric Company affect the
•~· .
results obtained In applying this type of Information. These variables Include, but are
not limited to welding procedure, plate chemistry and temperature, weldinent design,
fabrication methods and service requirements.
0
2. APPLYING THE SOLUTION GUIDE
The Lincoln Electric Csmpany ,seminars offer an excel- to estimate the capacity of thfl ·'iJJ!Idment based upon the
lent opportunity for engineers to discuss problems that are size of existing welds. In other cases, a failure was involved
•
common to many different areas of design. and the weldment was analyzed to determine the cause and
Orner W. Blodgett has compiled solutions to these prob- a correction was suggested. This booklet is not meant to be
lems and others that have been generated for companies in critical of any design.
an attempt to share the ideas that have been gained. The table of contents lists problems by subject matter
In order to limit this publication to a reasonable number and the end of each problem is noted by a bold rule line.
of pages, only a portion of each design is shown and each Readers desiring related information should refer to Design
full sheet has been reduced 75% to allow up to four of Weldments published by The James F. Lincoln Arc
problems per page. Welding Foundation.
Inclusion of a design problem does not necessarily mean Richard S. Sabo
approval of the design, in some cases the author was asked Manager of Educational Services
TABLE OF CONTENTS
WELD ALLOWABLES- PROPERTIES OF WELD LONGITUDINAL SHEAR
Permissible Stress on Welds . . . . . . . . . . . . . . . . . . . 1 Crane Runway Girder . . . . . . . . . . . . . : . . . . . . . . . 49A
Types of Welds . . . . . . . .. . . . . . . . . . . . . . . . . . . 2 Fabricated Columns with Wind Moments ........... 49D
Welds Treated as a Line . . . . . . . . . . . . . . . . . . . . . . 3 Plug Welded Cantilever Beam . . . . . . . . . . . . . . . . . . 50A
AISC Fatigue Allowables . .. . . . . . . . . . . . . . . . . . . 4 Platten for Press . . . . . . . . . . . . . . . . . . . . . ...... 50B
Built-Up Ends of Continuous Beam . . . . . . . . . . . . . . 50C
CIRCULAR WELDS Outrigger Beam of Mobile Crane . . . . . . . . . . . . . . . . 50D
Longitudinal Shear - 6 Sided Section . . . . . . . . . . . . 51
Moment of Inertia & Polar Moment of Inertia of Welds 5
Longitudinal Shear'- 8 Sided Section . . . . . . . . . . . . 52A
Weld on Trunnion . . . . . . . . . . . . . . , . . . . . . . . . . 6A
Longitudinal Shear -Circular Section . . . . . . . . . . . . 52C
Circular Welds in Bending . . . . . . . . . . . . . . . . . . . . 6C
Coupler in Steel Mill Roll . . . . . . . . . . . . . . . . . . . . . 7 CURVED MEMBERS
Circumferential Welds in Bending & Torsion . . . . . . . . BD
Butt Weld of Auger . . . . . . . . . . . . . . . . . . . . . . . . . 9 Basic Curved Beam Formu Ia . . . . . . . . . . . . . . . . . . . 53
Circumferential Welds in Torsion . . . . . . . . . . . . . . . . 10 Curved Beam Problem . . . . . . . . . . . . . . . . . . . . . . . 54A
Welded 2 Ton Press . . . . . . . . . . . . . . . . . . . . . . . . . 55D
•
Circumferential Welds in Tension . . . . . . . • . . . . . . . 11 B
Transfer of Moment Into Press . . . . . . . . . . . . . . . . . 56C
WELD SIZE EXAMPLES Weld Stress in Curved Portion of Lamp Frame . . . . . . . 58
Fillet Welds - Parallel Loading . . . . . . . . . . . . . . . . . 11 C TORSION
Fillet Welds -Transverse Loading . . . . . . . . . . . . . . . 11 D Torsional Members . . . . . . . . . . . . . . . . . . . . . . . . . 59A
Base of Signal Tower· . . . . . . . . . . . . . . . . . . . . . . . . 12A Torsional Resistance- Closed Tubular Sections ...... 59B
Circular and Elliptical Welds in Tension . . . . . . . . . . . 12B Torsional Resistance- Diagonal Bracing . . . . . . . . . . . 59C
Fillet Welds on Gusset Plate . . . . . . . . . . . . . . . . . . . 12C Frames Under Torsion . . . . . . . . . . . . . . . . . . . . . . . 59D
Circular and Elliptical Welds in Bending . . . . . . . . . . . 12D Member Failing in Torsion . . . . . . . . . . . . . . . . . . . . 60
750 Ton Press Frame . . . . . . . . . . . . . . . . . . . . . . . 13A
Lugs on Fork of Lift Truck . . . . . . . . . . . . . . . . . . . 13C TUBULAR MEMBERS
3 Dimensiona~ Welds on Storage Rack . . . . . . . . . . . . 130
Bracket$ on 400 Kip; Extrusion Press . . . . . . . . . . . . . 14A Welds for Tubular Structures . . . . • . . . . . . . . . . . . . 61
Bracket on D~iU Rig- 200 Kip Load . . . . . . . . . . . . . 14D Tubular Structures Fatigue Allowable . . . . . . . . . . . . 63
Transferring a Moment . . . . . . . . . . . . . . . . . . . . . . 15C. Dihedral Angle Charts . . . . . . . . . . . . . . . . . . . . . . . 64
Welding Attachment to Hold-Down Platten 17A Example of Tubular Connection . . . . . . . . . . . . . . . . 65
(temperature difference) . . . . . . . . . . . . . . . . . . . SHOCK LOADING
Sign on Tension Flange of Girder (stress difference) .... 17D
Bracket on a 3 High Steel Mill Roll (stress difference) ... 18A Shock Loading- Basic Information . . . . . . . . . . . . . . 67
Critical Fillet Weld Size and Shape . . . . . . . . . . . . . . . 18C Shock Loading- Basic Formulas . . . . . . . . . . . . . . . 68 •
Welds on a 1000 Ton Press . . . . . . . • . . . . . . • . . . . • 19A Girder to Absorb Energy • . • . . . . . . . . . . . . . . . . . . 69A
Welds on a Crane Base . . . . . . . . . . . . . . . . . . . . . . . 19D Welds on Car Bumper - 5 MPH Shock Load . . . . . . . . 69B
Link Support Bracket of Injection Molding Press ..... 20 Ore Striking Bumper Plate . . . . . . . . . . . . . . . . . . . . 69C
Links on Fork Lift Truck • . . . . • . . • . . . . . . . . . . . . 21 Weld on Trailer Hitch- Shock Load . . . . . . . . . . . . . 72
Attachment for Ripper Tooth on Bulldozers . . . . . . . . 23 Trailer Hitch - Road Conditions . . . . . . . . . . . . . . . . 74
Welds on Rail for Rollers . . . . . . . . . • . . . • . . • . . . . 24D Axle Mounting Bracket . . . . . . . . . . . . . . . . . . . . . . 75D
Stresses in Shell of Pulley . . • . . . . . . • . . . . . . . . . . . 25 Welded Eccentric for Vibrator . . . . . . . . . . . . . . . . . 76
Welding'bf Masonry Plate on Spandrel Beam . . . . . . . . 30D
Stresses in Double Discs of Roll . . . . . . . . . . . . . . . . 31 DISTORTION
Welded Pulley Block . . . . . . . . . . . . . . . . . . . . . . . . 33D Distortion of Spandrel Girder . . . . . . . . . . . . . . . . . . 77 A
Socket and Shank of Coal Auger . . . . . . • . . . . . . . . . 35 Diametrical Shrinkage of Butt Weld on Pipe . . . . . . . . 77B
•
Welds in 7,145 Kip Hold Down Box Ring . . . . . . . . . ; 38 Angular Distortion- Single Vee Groove Butt Weld .... 77C
Welds in Support Box Ring of Basic Oxygen Furnace .. 41 Angular Distortion -Single Bevel Groove Butt Weld ... 77D
Flange Welds of Vibrator . . . . . . . . . . . . . . . . . . • . . 43D Distortion of 90 Foot Long Bars . . . . . . . . . . . . . . . . 78A
Welded Rock Crusher . . . . • . . . . . . . . . . . . . . . . . . 45 Longitudinal Shrinkage of Girder . . . . . . . . . . . . . . . 78C
3. Stress Allowables for Weld ·Metal
I Type of Weld Stress Permissible Stress
COMPLETE PENETRATION ~ROOVE WELDS
Required Strength Level I 1 )(2)
Tension normal to the effective throat. Same as base metal. Matching weld metal must be used. See
Table below.
Compression normal to the effective throat. Same as base metal. Weld metal with a strength level equal to
or one classification (1 0 ksilless than
matching weld metal may be used.
Tension or compression parallel to the axis Same as base metal.
of the weld. Weld metal with a strength level equal
Shear on the effective throat. .30 x Nominal. Tensile strength of weld metal to or less than matching weld metal may
be used.
(ksi) except stress on base metal shall not
exceed .40 x yield stress of base metal.
PARTIAL PENETRATION GROOVE WELDS
Compression normal to' effective throat. Designed not to bear - .50 x Nominal Tensile
strength of weld metal lksi) except stress on
base metal shall not exceed .60 x yield stress
of base metal.
Designed to bear. Same as base metal.
Tension or compression parallel to axis of Same as base metal. Weld metal with a strength level equal to
the weld. 131 or less than matching weld metal may be
used .
Shear parallel to axis of weld. .30 x Nominal Tensile strength of weld metal
lksil except stress on base metal shall not
exceed .40 x yield stress of base metal.
Tension normal to effective throat. (41 .30 x Nominal Tensile strength of weld metal
lksil except stress on base metal shall not
exceed .60 x yield stress of base metal.
I ·stress on effective th.roat, regarle&s of
direction of application of load.
FILLET WELDS 13)
.30 x Nominal Tensile strength of weld metal
lksil except stress on base metal shall not Weld metal with a strength level equal
exceed .40 x yield stress of base metal. to or less than matching weld metal may
be used.
Tension or compression parallel to axis Same as base metal.
of weld.·
PLUG AND SLOT WELDS
Shear parallel to faying surfaces. .30 x Nominal Tensile strength of weld metal Weld metal with a strength level equal
lksil except stress on base metal shall not to or less than matching weld metal may
exceed .40 x yield stress of base metal. be used.
(1) For matching weld metal, see AISC Table 1.17.2 or AWS Table4.1.1 or table below.
(2) Weld metal, one strength level ( 10 KS I) stronger than matching weld metal may be used when using alloy weld metal on A242 or A588 steel
to match corrosion resistance or coloring characteristics (Note 3 of Table 4.1.4 or AWS 01.1 ).
(3) Fillet welds and partial penetration groove welds joining the component elements of built up members (ex. flange to web welds) may be
designed without regard to the axial tensile or compressive stress applied to them.
(4) Cannot be used in tension normal to their axis under fatigue loading lAWS 2.5). AWS Bridge prohibits their use on any butt joint (9.12.1.1 ),
or any splice in a tension or compression member (9. 17), or splice in beams or girders (9.21 ), however, are allowed on corner joints parallel
to axial force of components of built up members ( 9.12. 1.2 ( 21. Cannot be used in girder splices (AISC 1.1 0.8).
MATCHING WELD METAL AND BASE METAL
Weld
Metal BOor 70 70 80 100 110
A36; A53, Gr. B; A106, Gr. B; A131, A131, Gr. AH32, OH32, EH32, AH36, A572, Gr. 60, A614 [over A514 [2·1/2
Gr.A,B,C,CS,O,E;A139,Gr.B; DH36, EH36; A242; A441; A516, Gr. 65; A537, 2·1/2 in. (63 in. (63 mml
A381, Gr. Y35; A600, Gr. A, B; A601; 65; 70; A537, Class 17; A572, Gr. 42, Class 2; A63, mmi];A709, and under];
Type of A516, Gr. 55, 60; A524, Gr. I, II; 45, 60, 55; A588 (4 in. and under!; Gr. E Gr. 100, 100W A517; A709,
Steel A529; A570, Gr. D, E; A573, Gr. 66; A595, Gr. A, B, C; A606; A607, Gr. [2-1/2 to 4 in. Gr. 100, 100W
A709, Gr. 36; API 5L, Gr. B; API 5LX, 45, 60, 55; A618; A633, Gr. A, B. C, (63 to 102 [2·1/2 in. (63
Gr. 42; ABS, Gr. A. B. D, CS, OS, E D (2·1/2 in. and under); A709, Gr. 60, mmll mml and
60W; API 2H; ABS Gr. AH32, DH32, under]
EH32, AH36, DH36, EH36.
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4. J'n.LU IIBUI LOliDI!D IR .111ft' DDIIC'rlOJ!
i ! . l l - l e - weld 1.8 the .... ae baoe metAl.
llatcbi"'J -ld ....tal .....t bl lleed.
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Shall not overatzeae the baae metal.
PAR'l'IAL PENB'lRATIOII G!!90VB !!1!LDS
SREAII (pulled parallel) TBIISIOII (pulled aomal) AllowUle ahear 011 weld • .30 EXX om tbroat.
Allowable ahear on weld • • 30 BXX Allowable cenaioa om weld • • 30 BXX Lover atre119t:h weld: metal may be used at ita lower allowable.
Shall not overatreaa baae metal in Sball DOi: overatreaa base metal 1D
shear... • .fo 0y tension. • • &0 0y
Sball DOt overat.reaa the base metal in abear.
L.ower atrength weld metal may be uaed at ita lower allowal»le.
SHEAR PARALLEL TO AXIS OP !!§I,D
'l'RIJSS JOINT - COMPLE'l'E PBIIBTRATIOII GROOVB NELliS
71e teDaion COOipOAeftt would
require matahl D9 ""lei 118tal.
•
1.~1: ~M" '• p~n•.tnJ'tlotJ
~-·· .....d
Allowable shear ~ veld • .30 2XX on Uroat.
Lower atrenvth weld metal 11ay be u.secl at lta lower allowUle ..
AllowUle on ftlcJ is the aame aa baae
-tal.
Ma'tahl119 weld metal 'IIU&t be ueed ..
C9!!PI!BSSIOII IIOlUUIL TO AX.IS OP IIELD llot reooaended uleaa
Shall not overat.reaa the base metal in ehear. absolutely 118CBeaary
blcauee of exce•'l.ive
u01111t of welcl metAl.
TBHSIOR OR COMPRBSS!O! PAJW.L!L fO AXIS OP tmLQ
p>rtio.l
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&llawllble of ... ld ia the .... u l>aee •ul.
Lowv eU""9t9> weld - 1 •Y 1>a uBIId.
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5. A prggnrt;y gt H''ded qonpogym - trutfn• - weld .. a line c
Propertt~
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ot v ldad conneotlaa
- tre•ttnc he veld as a ltne
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T' r,.~(~i ~·-H... ••) -s,,.f(t;jf) c,•/c:•c~ r'(s+ Wp-~) Jy-- r'{a- sl!!p)
L..:r.JL..)• J= ~ + ~ Cr·
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7. A c
z
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nut aoment of inertia of a croas aectlon 1s referenced to an axis vhlch ~
~or the aeatton. It ie aa though the plana or tbls sect.lcm t.eDda t.o revol•e about
·tht.a ax,s, aee figure (a)., The basic moment ot tnert18 la a un.lt area mult.lplle4 b7
the square or tho dlet.anee or this al"'!a 1.o the reterer:ace ala, see tlgure (d).
Fisurea (a) and (d) reproeaent t.he moment ot i.nert.la about the (x-x) ax1a, and ripee
(b) aad (e) represent the moment Of ioertl.e about t.be (7-y) axle.
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'l'he polar moJIIEillt of tnertla ot a erase sect.lco ls referenced to an axil normal to the ' -
~ oJ.' the oroos secUcm.. It 11 as tbou.lh the plana ot thLs s~~"Ctloa teads to rotate
about this axis, see figure (c). The baaic polar J¥1msnt ot inertia is a unit area
~t~~lt.lpll.ed ~ the square of tbe rolar dlet.Gnce· t.o this area (~), see tltJ"U"8 (t).
Since the SQU.Ve or tbis polar distance la equal to the SWII Of the &qY:res or the
d1atances to t.he (x•x) and (;y-7) axea 1 lt. can be shown th11t thenpoler moment ot lnertla y
is equal t.o the sum or the moments or tnertla taken about cny t.vo axes at 90° to ••ch
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other. S!nce axea (x-x) and Cr•r) •re 90° to etch oth•1 the 8WII or the moment ol
inert.le aboat t.he (x-x) axla and the moaen.t ot lnertla about the (r-r) axlllll 1s equal
X
to the polar moRent or inertia about axis (s-z) 1 normal 1.o both axes (x-.a:) and ()'•7).
or r,... I,. .. r 7
/a.. ts) 1Y,
( .,.__~
y
e"= Y'+~t a/$t> y: r Sin .I.
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So e'&= y ..... sinLib
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: dp •
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It la possible t.o bave a condttlOQ la vbit:Jb the axU ot revGlutlon neit.her Uu 11 tn tha
plane or the section (1110ment or lDertl.a) nor 18 normal to the plrme ot the aect ion (polar IVe .,,;,11 9ef the same resuttif>vr ~o~.se the·pqr«lle/ aJttr
mollldlt or lnertla),
theorem. First f,h,J ~
a66ut tUI'S{z,-z,) t:hen -shift
para lie I t!J d1ste1ncP or(%.) -ilJ eo(i~ (2-z),
In tbe tollow1ag welcled aGMectt.on., oCOISlatlng or Wo el.ra.WI!'erentl.el velds 3o1n1n1 ~
trunnion ot a abaft t.o tvo end dlsce• tbe a.ls (z-z) F&&slns thi'OUSb the center ot snvlt-7 J"•• r .. + A("A/
•ee DW'S P•'!e z.2-8
or tbe welda 1s t.ba az1a abou:t vhich the two velds tend to rot.at.e because ot t.be beodlns
act.lon or the t.runnlcD (vartloal bearlns 1"88ctlan X the moment an.). Notice that the
Iz,= (2wetcls Y1r "r1) tt
Dw f'A'Ie
b...t- lle<f lee t (t)
z:s-1"
A~ k weldi)(z'llr)
retarence axis {z-z) lies parallel to tbe plane of eaah veld. P'o-.ap, but does not lle
vlthln eltber plane. J. • C! 1t r "t 'l'lrr( ~)' • arrr'!T"rb"-
U ve cCilSider tbe t.vo clrcumterentl•l-velds (a) ~ (b) u conoentr~Wd at t.helt aent.era
or aravity, th8D lt ls seen tb3t the ret'ereaoa uls (z-•) Ls ncmu:l to the plane 01' these
1 Jz = 'IT"r~-~r:. ~
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'"4&ld groups, therefore ve could. call tbls properf.J' ot the :;~ect10JI 1 polar IROIIMJft~ or 1nert1a•
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raoment arm • IS
P"'perty of l,<ldd, - ~... bc"d1nq 4b.. ..t ~~nter oF "fi'<IUity of we/Js
J..= 'IT'r-(zr'+b"") • '!r-2"·1Z(2j.T-('''"J• z?'·~in"
horiuntll./ compen.. nt p~ b<rndtnq
(. M c: ... Qo.Dt>olbt• lll•Y2.th) .. DLI()'> d,,.
rh T 2.?(.,5' 1 hl · -,-, ,• 7111
uertt~l component ef
beadmq
r • !1ft. jlooorJO 1/n•I'S•nXJtn) /{) ~
rv :r. 2'1'-S" ,;i~ " /,'I •5 ,;,
vert iea.l 'hea.r
'"h.:t•4~<e "u..-l.re for f.'llet welrl1
a~ •-t•ID~cyoM Wid r<lflllt! K<=-1 ,...•nol
IS 1'= 'IS'DOp.,· on thrMt
- bto),!l,C"·""' .~
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b~<t ne91er.t' c~)
low • - • 'Ills tnlllnlao tllmo "' 200 IPII ond raqlllrea 100 81' to drlve 1•,
A" {z we.lcls)t2'11'r)
T " c.'!lpoo HP .. 43.oooXtco). '3/ '
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$
I 2
"' Z 'lt't" ~ f 't'rtr(_j}'l.
pro pert'( of. weld J~ = T • T
'ltd • 'It 'I ~
~ liO. 27 in..,
. ~or one we(c{ or Tz = 11"1 ( 2 r .. + b")
J.· z.(so.2'1)~ IIJO,fi'itl'(t~Jo"J•/ds) Ex&~mele
M .. ~ .. ; 111 • In /<ops bw 11. 1rr E?Owe/d
i" tu:tr<:& he.au.., pipe • A• /l.e in" t.•.!lJin
u.nit ~ore e "" weld oD• :~.-zS'• r='f.lur I • 10~ in4
ft • J.~ /1>t,S'OO ,;, /h"S in)_
TC.
/OO,fi'
ll>s){2
-
6. z ~. 'f 'itt;,
r ~· )'!7.'!fl.r,;.
r~.· I'IID.S t;',p
~""" ~.· '9'10. "!I,,,;,
f,· (.H..ttU.It,;
•
6
9. A c
•
It: is cU.ffiCNll: ~ give a dir..,t .,...,.. on the design of thie
welded coupler. Although the ral:ed - of the clriving 1110~
land Ua RPHI are given, there is aome quenion in my mind aa ~
whether this ie th8 11uiJDIIDI ~rque or c:oulcl U: raverae inatant:ly?
Could this be a ahoal< loed? COUld thare be any miaalig-nt in
this C011pler7 If so, thia aould introdllaa very high bending
__ ..... ----
11101181t& on tbe eo~~plar. M ----...::.-.:.:::
I am DDt certain ao ~ the type of applioation of the load -
steady, fatigue, or oboe!<. U fatigue, then the life axpeoted
!..r:r ::.~~r.' : l d"=.!~e.~~.::'"::: :r~=~o::.::~of
....
the wlda, Por erample, with B70 weld metal - frOID a valaa
going
of f • u,aso v for ateady loads all the way dovn ~ F • 3180 v
for a complete reversal fatigue 1oa4 over 2, DOO ,ooo cyale•.
On aheat l&l , I have checked the fillet - l d le9 alae for ~oion
only. 'fbe aiae,variea from two 3/8• fillet• Lor a atea4y load~
t110 7/8' fillets i f complete reveral in fatigue.
a s . - to be -fectly
:t:!::..~~ ~.
r,id.
On sheet IS) , I haVe aonaiclered the additiQI81 problem of • -
vertical llialignllant 1.010 incbesl i f the - . (discs) are
Of c:ourae, thio aondUion would
·';3,, i= ;, ~lf::.~:.:::a f!:"~!i:lte
as-sume A,.. 010 ,;,
M ~ "{3o•tc•X&&9s-){. 010),..
in~ couiderat:ton •
(71) ...
• Two c.h-cum Ferenz'lq/ fillet wekls IAJ(Jt.ld have
of ;nertti:l of- (treatti79 weld as a /he)
c:2 ~/4.~ .'Tl~rne·rrt
Fortl.l.nQtely the end d1sc<:. arf!" not 100?, r/9/d, t!Jere
!-Jill be ::.ome venciin~ in the dr'~s ana the moment(MJ
V1ill be much lower.
r.a.
D
J.,-=2{-"ti·'): 1fi-'~. 7r(:_r.lm zr...sso. ,;.,"
,. .. J} .,.. F.· .If:..." [o;.,oo.~X/.3) _ 't:...., 1•1;::.
• <t 2'-, Sc5"0 - z.:; "" "
-11
-··--··-----------------
For steady /()adtt?r and .£ 70 -,.,efd mdttl, the ,:;,_~t.--a!A· 'S
~ "'(.3oY'Io.ooo'f'!"7)-=- 1'/,'ii'.SO 161,;., ,.
"'-r,
/,e9 517--e w~ ~ O.''
~= .17o • F.• f, r,ll(• f. 'Yr.
but because of the z?./dts'c I lASe t 1-1'0 14nit force on welcled e<>nnedton F.·ffi
'S= ~d~ •1tr~ (treated as a ltne)
f ~ • ~ • ::."1,. pricJ. ~~fit~Nr InCh)
5iart IAnth a ~ertrie.l dtspl~tcement Qnd um;rier
ends f ,jc.,cl • c:ldermlne end momedt th tut.e
-----:101~ ®
•
L conclt'tkm
. 7.
10. A example L~7/,;,
c
,_,. 111/A>111 end dries 'to n:~~te (~) s.. there /S nt> 1!'nd
tr10ment lh tde r,= 13.0,,; b•/3.5'111
---'9..1--
·1 I r~· l'.S in t• ~~, ,;,
•
·~f A. r ,()(0 1;,
Fz· '~F' (~·+~
t>oweIE'r -To>---;r
,. t)
A,= 6j,r;
..., 1~ {/JJi ..!QS~ 6c1 1$ !lfptJI;?.e oncr
,~rFa':t~"i nNJm•nll rcac-t,"rr :..~-,..
.,,., '•l
and
s•~n .
f',_ •
~
trr.r-..
t
l:= 1.
z~/
d t".lc:
Q-=s-=s_ec_m_e_
h
.
___J_-L.:.._:
,--- dll' 2,... 1
'50 (,F t'(~ "''
A r...c b" 7i b + ""'
11' r;
c>r
"' ... • 'lrr.r. t'E 8..(:2r.t
IY~'I''tJ. ,Zbl I
b) fb•~• 2~;: • /II.{() /Jyq, h" F'y._,..,_,.• '3c>S lbltn f, • IC,<t(> !ft•.(.._.,. ~~..,1([))
~. • jr;,...;if,' fll'it>'t 305'
0
• ZC.YO~ "' 2.890 16/fir
~rom ~l>eet(i), fa1t'l.""' a/iowa bit',·~ ~·1teo
her>ce k'l -:.ru ..uo .. !d b.. w• 1f~g.,. 9o~· or@
B
T _ l____ :
d,,. :
·-----~!
J ___IIi.:-.. ··--·'
.
itA. be.
,tt~~ H·;s.
,,,. ~--t;i-
and t?· e. t e. tn••ta11t 11n:t fo.-c<." on ""ld
,.,.., Vft b'
e• i7Y + :ii'lt:-:r.~.r.lf.""t•""E"'c"':~""r;+""b'""~ lr' jf,'• fb'• f,' • /.n'+ z.z~·+ z.~s· ::: 1.51"''~
u~i> Al'SC. Fat•cjut> Allowabln cat<'qt>ry@ '"'"
or E'IO WEld
life N= lfXJ. 000 l!f(Cfe~
mrtal
'!i{re-:;, "'"''If! k • rna. -0
<11/c>wable 1'.,.., ~ ~ • ~· = J$" 51 b.i not fD P<ef"•~ 21 .,,
le1 -,,z ~ .,f f,'flti ....~·d
alt.o <r<>tnq bo.clc l.o the 1,.-j:..-~ o" o;heef@
~:r.. ('~I:as) !Jt
•
2
M.. • bw.t L· A.· e r;
~.0:..1 bel'<;.:;
a. u.nit lei"CC-i ~ o' ""''d.-d
conneet,On
. 8.
11. ~r~----------~l=zoo,~U--------------------------~j7
A c
~k-------....Qa. ,,.,•::..·---------~,k!f----b c s'""'----~:JI
'A•1f·"t~'' ) I ~
I l I I 1 1, AA AA~IIAt.t.~ Slnca tnle part ratet••• U •lght ba wall ta u•• tf'la AWl f et1Que • aftiiUlM rar tN
allaweble at tllil fillet weld.
• f .V J {/
v If' 1 J · 'I 'I ~~~V V V V V V . For
/!s.~t"/t· orZ.ill"f.;,
Ze>.l
)
'Ytt or 1,6&!1.;,~
¥1/f~ ,, 3.'15 ~n lr/00 4J
1- "Yz
I.U•/,,811tr••
3VOO C(J
HH+H::oj
.IE .. 11¥. ---il
t.."lt:I0"-
, ... : •..j
1"1,• ¥ft·1<}: (I.,S~IIY)(zoo-1/<f)" • /2Z
IJJ.o..i baou:e .of the .• 'i~'l ml:h {h,C.( P!Re 1 AWS
wo!.l.ld trG>urre a m•mmu•n o~ ~4>~b
lf tnla ware ahaek loading, tnla rarca could double. I believe the biliKiaat
unknown load waul.d be the b6:~d1ng ar tna IIYJUrlal to be canvaved, lllhleft tPDuld
rorca the ac:rBtu upward ln the central poi'Uon.
herc e• D
~- ~(1a ib)•(,,qs)ls~:Nz.,u4+8') =
lt• 2L 2(>Da)c(
....,._ 12.4£):
R,=r~.<r~ ·~.)(8'-···)-H,.f lbs' 50 ,., - '-..
tnsume an averape t!Jiiness of the tuhe 1!• • 4>¥8,/,
a, 3 '/ s: ,;, b-. and o.D. "r;,o,;, , then :r"' 3~ 7 /n-r
/1,: f f '1'3.~
I t the sc.rew were ~reed !A.pward A." /.Chn
/VT"' (iz){J)()o~lo•Y39.1)"' 3 ~7, 3oo. ,;,;6, 1
(:).Oo)'l..
• TN only t.arque an thla cunnac:U~m waulcf be that portion eppllad to tna
auacnad aacUon, hOwever we 1111111 ue• Ule full value af tnat supplied by tha
ddVII unit, aesu•ln; the ather and 11 stuck,
8
th/r. would <UUtse a unit /;end;na farce on tr.. -::
weld of-
f =~;
.,..,
3s-?;300 .. ~
u •. , ~
·;.7
D
f-------4--:r
the steaclf( alhwable on a ~~ 1:::. E 70 IS:
T" "'·0()() liP - fi,UJDOxlt~)
RPM • '1'1
a 12,8'1:? I.? ll>
F= //,ZOO W 2
//,:J.OO{f16) ... E 'i>;i;)
-the Fatt9tt(> a//tJwa~le on 4 ~6h F10 1S'
F
~ S/00 1.t.>
1-%
. ,.1!.9...
, ~
.,../,_,, •
J..,·c.. 'f a
As ,a me:d't'er of 1nterest the b(!ndm9. str~ss
unit torce' on weld m t-he ru.6e under tl11's tJt7nd, 'tton tS-
b~rrdtng ~ • tj • 2.2,S'?S' : tfOO, :6 /!:., "Jtnce N/ =~ Rna /if= IZ ~.._"·I
b 'S., ~-'
~ f = I£. (iz,a1o ')(-,,;,) = I I 3. !;/··:· tr"'
12.4 E"C.
L.._
t ~ 3'10
unit force
r--.~b
resu.lt Qni Tn1a would lndlcat:a 'Lhat: two 5/16 inch fillet walda would prabably provide
the raqubad at.rangt:h af tha tullaa far the ~ loa.da involved; hQtQe¥81' U
~t' nt:al'lal al'tould bind end fare. the BC.f'tl¥ up.rard, tor pample juJt: 1 tnch,
aat1111
the load on the weld as ~~~rell aa tha etraee .1n the tube wauld be varr hlgft.
hv /(+ ~~.... '"(}()tiS' '1/6 16h_.;
•
. 9.
