ABCDEFGHIJKLMNOPQRSTUVWXYZAAABACADAEAFAGAHAI
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Purpose of calculation:
areaforceinertialengthstress
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Calculate stress in a 'bath tub' tension fitting.
Metricmm2Nmm4mmMPa
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USin2lbsin4inlbs/in2
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Calculation Reference
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UK railway industry method (the British Rail "Brown Book" method).
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Calculation Validation
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Independent verification is required.
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Units=
1
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Input values
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Geometry
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R =50
mm
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t =7,5
mm
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e =10
mm
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d =22
mm
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i =6
mm
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Loads
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P =3000N
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Calculated Geometry
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r =42,5
mm
#NAME?
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a =46,25
mm
#NAME?
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k =9
mm
#NAME?
Note: this is true for standard bolt sizes
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Stress in the wall
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Section AA
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A =#NAME?
mm2
#NAME?
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Second moment of area
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I =#NAME?
mm4
#NAME?
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Distance from neutral axis to extreme fibre
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v =#NAME?
mm
#NAME?
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Direct stress in the wall
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σdw =
#NAME?
MPa
#NAME?
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Maximum tensile bending stress in the wall
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σbw =
#NAME?
MPa
#NAME?
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Total stress
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σt =
#NAME?
MPa
#NAME?
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Stress in the end pad
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e/tZ
Value Selected
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10,391,3333333330,449
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20,55
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30,68
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40,76
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50,815
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60,845
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70,87
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80,88
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(e/t)=
1,333333333#NAME?
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Z is a factor read off from graph - a 'best fit' polynomial curve is used in place of graph.
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Z =0,449#NAME?
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(a-d)/ki/a = 0.1i/a = 0.2i/a = 0.3i/a = 0.4
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10000
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1,51,321,351,41,52
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22,12,22,32,5
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2,52,752,8533,25
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33,23,33,53,8
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(i/a)=Interpolate
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0,1#NAME?#NAME?#NAME?
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0,2#NAME?#NAME?#NAME?
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0,3#NAME?#NAME?#NAME?
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0,4#NAME?#NAME?#NAME?
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Value Secected
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#NAME?#NAME?