Enter numbers at BOLD Text Locations, Results in RED
Loads
Interference Parameters
Equations Ref
Torque to be transmitted (N-mm)
torque
Minimum required interface pressure (N/mm^{2} )
rPI
Axial force to be transmitted (N)
force
Differential Poisson radial interference due to axial force (mm)
ddp
1
Coefficient of friction
mu
Differential thermal radial expansion (mm)
ted
2
Operating temperature (^{o} C)??
ot
Outer body rotating inner diameter radial displacement (mm)
robd
3
Stress concentration factor at interface edge
scf
Inner body rotating outer diameter radial displacement (mm)
ribd
4
Rotation speed (rpm)
rpm
Total additional diametrical interference amount to be added (to ibod) (mm)
addi
Outer body input parameters
Interference Fit Calculations (Assumes addi has been added to ibod)
Outside diameter (mm)
obod
Maximum diametrical interference (mm)
maxdelta
??(See diagrams)
Interface diameter (mm)
obid
Maximum resulting interface pressure (N/mm^{2} )
maxip
5
Plus tolerance (mm)
obptol
Minimum diametrical interference (mm)
mindelta
??(See diagrams)
Minus tolerance (mm)
obmtol
Minimum resulting interface pressure (N/mm^{2} )
minip
5
Modulus of elasticity (N/mm^{2} )
obe
Minimum safety margin (min obtained pressure/required pressure)
Yield strength (N/mm^{2} )
obsy
Maximum sustainable torque (N-mm)
maxt
Poisson's ratio
obn
Minimum sustainable Torque (N-mm)
mint
Coefficient of thermal expansion (1/^{o} C)
obcte
Minimum safety margin (min obtained torque/required torque)
Density (g/cm^{3} )
obrho
Outer body material stresses at maximum interface pressure
Inner body input parameters
Radial displacement of inner surface (mm)
6
Engagement length (mm)
L
Radial press-fit stress at ID (N/mm^{2} )
obsr
7
Intended outside diameter (mm)
ibod
Circumferential press-fit stress at ID (N/mm^{2} )
obsc
8
Dimensioned outside diameter (mm)
Axial stress from applied axial Force (N/mm^{2} )
obsz
9
Plus tolerance (mm)
ibptol
Shear stress from applied Torque (N/mm^{2} )
obtau
10
Minus tolerance (mm)
ibmtol
Max radial centrifugal stress (N/mm2)
obrc
Inside diameter (mm)
ibid
Max circumferential centrifugal stress (N/mm^{2} )
obcc
11
Modulus of elasticity (N/mm^{2} )
ibe
Max Von Mises stress (N/mm^{2} )
obvm
12
Yield strength, obsy (N/mm^{2} )
ibsy
Resulting safety factor (Yield stress)/(scf*Von Mises stress)
Poisson's ratio
ibn
Inner body material stresses at maximum interface pressure
Coefficient of thermal expansion (1/^{o} C)
ibcte
Radial displacement of outer surface (mm)
13
Density (g/cm^{3} )
ibrho
Radial press-fit stress (N/mm^{2} )
ibsr
14
Shrink-fit design
Circumferential press-fit stress (N/mm^{2} )
ibsc
15
Desired assembly clearance at deltaT (mm)
ddt
Axial stress from applied axial Force (N/mm^{2} )
ibsz
16
Required differential temperature if heating outer body (^{o} C)
robdt
Shear stress from applied Torque (N/mm^{2} )
ibtau
17
Required differential temperature if cooling inner body (^{o} C)
ribdt
Max radial centrifugal stress (N/mm^{2} )
ibrc
Press-fit design
Max circumferential centrifugal stress at ID (N/mm^{2} )
ibcc
18
Maximum assembly force to press fit (N)
Fpfmax
Von Mises stress at ID (N/mm^{2} )
ibvm
19
Minimum assembly force to press fit (N)
Fpfmin
Resulting safety factor (Yield stress)/(scf*Von Mises stress)
Evaluate the stresses at inside, outside and sqrt(DiDo) diameters
For the Outer Feature
case 1: stresses at inner radius
Case 2: stresses at outer radius
Case 3: stresses sqrt(DiDo)/2
Radial press-fit stress (N/mm^{2} )
Circumferential press-fit stress (N/mm^{2} )
Axial stress from applied axial Force (N/mm^{2} )
Shear stress from applied Torque (N/mm^{2} )
Radial centrifugal stress (N/mm2)
Circumferential centrifugal stress at ID (N/mm^{2} )
Von Mises stress at ID (N/mm^{2} )
For the Inner Feature
case 1: stresses at inner radius
Case 2: stresses at outer radius
Case 3: stresses sqrt(DiDo)/2
Radial press-fit stress (N/mm^{2} )
Circumferential press-fit stress (N/mm^{2} )
Axial stress from applied axial Force (N/mm^{2} )
Shear stress from applied Torque (N/mm^{2} )
Radial centrifugal stress (N/mm2)
Circumferential centrifugal stress at ID (N/mm^{2} )
Von Mises stress at ID (N/mm^{2} )