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Axial Strength
P/A
Shear Stress
V/A
Bearing Stress
P/A
Hooke’s Law
Stress = Eepsilon
Axial Deformation
PL/AE
Torsional Shear
Tp/J
Angle of Twist
TL/JG
Transverse Shear Stress for solid circle
4V/3A
Transverse Shear Stress for hollow circle
2V/A
Transverse Shear Stress for rectangle & triangle
3V/2A
Moment-Curve Equation
1/P=M/EI
Flexure Formula
f= MC/I
Tangential/Circumferential Stress
pD/2t
Longitudinal/Spherical
pD/4t
Determinacy of internally stable
i= r - 3
Determinacy of Internally Unstable
i = (r+fi)-3n
Determinacy of trusses
i = (m+r)-2j
Determinacy of frames
i = (3m+r) - (3j+ec)
2 moving loads max moment
M=(RL-PsD)2/4RL