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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Note requires XlXtrFun addin (interp function).
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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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b =50
mm
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n =50
mm
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t =5
mm
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e =5
mm
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f =5
mm
Note: this is thickness of the bottom plate in section x-x
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m =
40
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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k =9
mm
#NAME?
Note: this is true for standard bolt sizes
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D =13125
mm3
#NAME?
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Stress in the wall
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Section AA
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A =750
mm2
#NAME?e/tZ
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10,39
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Second moment of area
20,55
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I =#NAME?
mm4
#NAME?30,68
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40,76
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Distance from neutral axis to extreme fibre
50,815
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v =#NAME?
mm
#NAME?60,845
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70,87
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Direct stress in the wall
80,88
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σdw =
#NAME?
MPa
#NAME?
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b/ni/n = 0.1i/n = 0.2i/n = 0.3i/n = 0.4
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Maximum tensile bending stress in the wall
10,840,5550,390,285
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σbw =
#NAME?
MPa
#NAME?1,50,940,660,510,38
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20,980,7050,550,42
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Total Stress
2,510,730,580,445
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σt =
#NAME?
MPa
#NAME?
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Stress in the end pad
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(b/n)=
1
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Q is a factor read off from graph of 4 curves - 4 'best fit' polynomial curves are used in place of graph.
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Q0.1 =
0,84#NAME?0,1
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Q0.2 =
0,555#NAME?0,2
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Q0.3 =
0,39#NAME?0,3
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Q0.4 =
0,2768#NAME?0,4
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(i/n)=
0,12#NAME?
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Q =#NAME?#NAME?
Note interp is a XlXtrFun addin function
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Bending stress at bolt head position.
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σbp =
#NAME?
MPa
#NAME?
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Maximum shear stress at bolt head position
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τp =
#NAME?
MPa
#NAME?
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