Threads Analysis
11-19-1993
15:46:58
Input parameters:
Nominal diameter = 0.2500 inches
Threads per inch = 20
Pitch diameter = .2175000011920929 inches
Thread class number = 2
Engagement length = 0.175 inches
Minimum section ID = 0.0000 inches
Minimum section OD = 0.1887 inches
Tensile yield strength = 30000 psi
Shear yield strength = 17321 psi
ID of head bearing area = 0.3000 inches
OD of head bearing area = 0.4380 inches
Coefficient of friction = 0.100
Thread half angle = 30.0 degrees
Moments and force:
Applied Torque = 26.15 inch-pounds
Axial Force = 668.09 pounds
Thread torque = 13.82 inch-pounds
Stress between the head and the threads:
Applied axial stress = 23889.01 psi
Applied shear stress = 10477.20 psi
von Mises stress = 30000.00 psi (=Sy at yield)
Shear stress in the threads:
Equally shared stress = 6042.07 psi (not elastic)
Two loaded threads stress = 10573.62 psi (elastic)