SHAFT DESIGN Flashcards
is a rotating
element that transmits power
from one part of a machine to
another
Shaft
are fundamental components in mechanical systems that
transmit power, torque, and motion between different machine
elements. They play a crucial role in transforming and
transmitting energy from the power source to the load.
Shafts
are found in a wide
range of applications, such
as engines, turbines,
pumps, conveyors, and
more.
Shafts
are widely used due to their excellent strength,
fatigue resistance, and toughness. They are suitable for heavy-duty
applications where high loads and stresses are encountered.
Steel Alloys/Alloy steels
offers corrosion resistance, making it
suitable for applications exposed to harsh environments or chemicals.
Stainless steel
are used for general applications
where moderate strength is required
Carbon Steel
are lightweight and are often used in
applications where weight reduction is important.
Aluminum
used in specialized applications where a
combination of high strength, low weight, and corrosion resistance is
essential.
Titanium
directly impact the performance and reliability of
shafts.
Material properties
The material’s ability to withstand loads and stresses
without deformation or failure.
Strength
Resistance to wear and abrasion, affecting the shaft’s
longevity.
Hardness
The ability to withstand repeated loading without
failure over time.
Fatigue Resistance
The material’s ability to absorb energy without fracturing.
Toughness
Resistance to degradation due to chemical
reactions or environmental exposure.
Corrosion Resistance
These
components ensure torque
transmission between the shaft
and attached elements.
Keyways and Keys
Used to connect
shafts and transmit torque
between non-aligned shafts.
Couplings
Provide support,
reduce friction, and enable
smooth rotation of the
shaft.
Bearings
Attachments that
connect shafts to other
elements, such as wheels,
pulleys, or gears.
Hubs
Hold
components in place on the
shaft, preventing axial
movement.
Retaining Rings
occurs
when a shaft is subjected to
twisting moments.
Torsional stress/torsion
can be calculated using
the formula τ = T * r / J, where T is
the applied torque, r is the radial
distance from the center, and J is
the polar moment of inertia.
Torsional shear
stress (τ)
arises
when a shaft is subjected to a
bending moment. can be calculated using the
formula σ = M * c / I, where M is
the bending moment, c is the
distance from the neutral axis,
and I is the moment of inertia.
Bending stress/bending
such as when a shaft
experience both bending and torsion, the stresses need to be
superimposed and evaluated simultaneously to ensure the shaft’s
integrity
Combined Loading
are
fundamental concepts in shaft
design that influence the
structural integrity and
performance of the
component.
Stress and strain
