Failure of Knuckle Joint Video Lecture | Design of Machine Elements - Mechanical Engineering

[Music]
astronomy comb today I am doing a video
on the neck enjoy I already had done a
video on this topic so what is new in
this video first in this video you will
see like a joint in 3d you and I would
tell you how and from where the failure
stars more I would tell you about the
areas in each finger I hope it will make
your concepts clear let's start with the
parts introduction the red part is known
as pin yellow part is known as eye and
green part is known as fork in the
assembly pin tend to hold the eye and
form together
first we will talk about the failure of
n draws the four and the I have seen and
drawed daya's the end rod will fail
intention as opposite forces are being
applied on their area in this failure is
simply cross sectional area of the hole
forget about the I for a while due to
the forces on the fourth it is being
pulled in this direction but the ping is
trying to keep it in its place
the fault will exert force on the ping
at this point and at this point it may
cause a failure of pin for this period
the area is died of the pin into
thickness of the form
now forget about the fault similar to
the fault that I would exert a force on
the ping as it is being pulled so this
part would cause the failure of the ping
the area is died off the pin into
thickness of the ice circular part
up till now we have discussed the
periods of the pin due to I and fall
separately now third failure would be
due to the combined effect of the eye
and fog as I am for car under the force
which are opposite the only thing which
is heard and in this way to move in that
direction of force his pin so they will
try to share off the pin so the shilling
of the pin will happen at this point
and at this point for this failure
projected area is simply the
cross-sectional area of the pin slender
let me separate the eye first as we have
discussed the crushing of the pill and
his eye now what would happen if intent
to cause the failure of the eye actually
pin is trying to hold the eye in the
place and eyes under the influence of
the force in this tug-of-war
the chance of failure of pin and the eye
are equal so if I feel do to pin the pin
will be free by removing the eyes
material like this and it will break
material from this part in this failure
area is half of the eyes external circle
daya into thickness of people you may
have a question by half of the daya
because the ping will remove material by
half of that ayah
in this failure that I will fail like
this the reason behind this is the part
which is already has a hole or crack or
deficient in material Woodfield first
when stresses are applied on it so the
projected area in this case would be
next to the circle daya excluding holes
daya into the thickness of fine
for and I have similar failures we may
cause the failure of the fourth night in
the eye because the pull force on the
phone the pin will remove the material
like this and pain area would be the
half of the external tire into the
thickness of it and multiply it with two
as both of the leg would be filled
in this failure the circular part of the
fork will be broken from this so area
would be outside daya excluding small
daya into the thickness of the form I
hope you have learned something from
this video for more detail you can watch
my other video on the nikunj my link is
in the description see you in the next
video