rail testing
TRANSCRIPT
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Laboratory test standards
for assessment of railfastening system
performance
David Rhodes, PhD - Pandrol Ltd., UK
Bob Coats, P.. - Pandrol U!"
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Rail #astening !ystem$%ali&cation 'ests
%rope ( C) *) ++-/0
1apan ( Rail2ay 'echnical Research3nstit%te *R'R30
)orth "merica ( "R4" *Ch. 50
6lobal 3n7%ence *"%stralia, "frica 8
others0
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TEST CEN AREMA Subject
No.Longit%dinal Rail Restraint 9es 9es /
'orsion 9es 9es "tten%ation of impact loads 9es 9es Repeated Load 'est 9es 9es :lectrical Resistance 9es 9es +!evere *Corrosive0
nvironments
9es )o
;et < "brasive
nvironments
)o 9es :
Clamping #orce 9es 9es /3nsert P%llo%t 9es 9es
Rail Pad Dynamic !ti=ness 9es )o>ertical !ti=ness 9es 9es Lateral Restraint )o 9es
Rail Uplift )o 9es
Dimensional "ssessment 9es )o
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lectrical 'esting
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lectrical 'est Re?%irements
C)@ : A Resistance minim%m
"fter 2ater spray, corrected forresistivity
"R4"@ +5 A 3mpedance minim%m
"fter s%bmerged soaA
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Clamping #orce *of rail clips0
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Determination of Clamping #orceB! ) ++-@/55/
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Longit%dinal Restraint
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Determination of Longit%dinal RailRestraint
B! ) ++-+@/55/
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Longit%dinal Restraint
C)@ P%ll to slip, A) *+,: lb.0minim%m
"R4"@ /,55 lb. *+5. A)0 2itho%t slip
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>ertical !ti=ness
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Determination of >ertical !ti=nessB! ) ++-@/55/
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Determination of "tten%ation of 3mpact loads) ++-@/55/
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'orsion
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Determination of 'orsional ResistanceB! ) ++-/@/55/
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Repeated Load 'est
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Repeated Load 'est -P%rpose
Pre Repeated Load Test SeriesClamping #orce
Longit%dinal Rail Restraint
>ertical !ti=ness
Repeated Load Test
Post Repeated Load Test Series
Clamping #orce
Longit%dinal Rail Restraint
>ertical !ti=ness
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Repeated Load 'est ( 'racAData
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6 l 4 h R d L d '
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6oal@ 4atch Repeated Load 'est toRail Life
Rail Life in Track?
'racA 46' per 9ear +5 :5 +55 +:5 /:5 55
9ears to B6' 55 5 5 /5 +/ +5
9ears to + B6' +55 /5 +5 . .
Laboratory 'est
Calc%lating n%mber of test cycles to correspond to B6' E 46'
Car ;eight//55
5/5
55+:5
55
"Fle Load ::55+:5
5:
5
;heel Load /:5
::
5
G
:
Railseat Load +:+
:+G
*ass%ming +E/ 2heel load on railseat0
3n theory, fo%r /5 Aip load cycles e?%ates to one+:,555 lb. car
Hne 46' e?%ates to Gcars or /:Gcycles
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+R /5Aip Lateral Load 'ypical Rail Clip Loads
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+R /5Aip Lateral Load 'ypical Rail Clip Loads
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+R /5Aip Lateral Load 'ypical Rail Clip Loads
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3nstr%ctions for the Cyclic Loading on an "ssembly) ++-@/55/
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3nstr%ctions for the Cyclic Loading on an "ssembly) ++-@/55/
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Repeated Loadtest to R'R3!tandards
*1apan0
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AREMA CEN '(a) *#+
,ips *kN+
'(in An"le
-
e"
L $ /
Ratio
'(a)
,ips
*kN+
'(in An"le
-
e"
L $ /
Ratio
Li"!t Rail 0#
*11+
0
*1+
28.3
4.84
5en 'rei"!t $
Transit
24
*022+
62.2
*01+
#4 0%
*%1+
0 *1+ 22 4.31
7ea9 7aul 2#.1 *01+ 0 kip
lateral
#%.1 4.1# 0:
*82+
0 *1+ 22 4.31
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Laboratory test standards
for assessment of railfastening system
performanceDavid Rhodes, PhD - Pandrol Ltd., UK
Bob Coats, P.. - Pandrol U!"