MODULE 1 Flashcards
(22 cards)
What are the modes of failure in machine member under pure tensile load
strength failure and deformation failure
what is equation for strength failure in pure tensile load?
YIELD/ ULTIMATE STRESS/ FS = F/A
what is the f fore deformation failure in pure tensile load?
deformation == elongation limit
what is the equation for deformation?
FL/ AE
What is the modulus of elasticity in steel?
E = 30 x 10 6 psi or 207 GPa
If L/k < 30, it is?
pure compression block
What is the equations use in a pure compresion block?
the same as the eq in machine member under pure tensile load; strength failure and deformation failure
If L/k<30 <120, it is?
short intermediate column
If L/k is greater than 30 but less than 120, what i t is?
intermediate column
What are the 4 equations you need to remember for a short intermediate column?
euler formula, jb johnson, slenderness ratio, B/k2 criterion
If n = 1?
both pins are pin guided
If n = 2 ?
one end is fixed and other in pin ended/ guided
if n =4 ?
both ends are fixed
If n = 1/4 to 1/2
one end is fixed one is free
If L/k > 120?
then pure bending only -long column
What is the equation use in only long column?
bending stress formula, bending stress = Mc/I
What is the eq for machine memeber under pure torsion?
Induced stress = design stress
Induced stress = Stress/ FS
Design Stress = Tc/J
What are the 2 failures present in machine member under pure torsion?
strength failure and deformation failure
in pure torsion, how to get srength failure?
Td = 16T/piD3 for solid and Td = 16TD/ pi(D4 - d4
in pure torsion , how do you get the deformation failure?
angular tosion = TL/ JG
what is the common value of G in pure torsion if not given?
G = 12 x 10 to the 6 psi
