Stress Concentration due to Holes and Notches
Consider a plate with a transverse elliptical hole as shown in Figure (a) and is subject to tensile load. We see from the stress-distribution that …
Machine Design
Explanation to Compound Cylindrical Shells
According to Lame’s equation, the thickness of a cylindrical shell is given by: From this equation, we see that if the internal pressure …
Factors to be Considered while Designing Machine Parts to Avoid Fatigue Failure
The following factors should be considered while designing machine parts to avoid fatigue failure: Variation in the size of the component should be …
Explanation to Concentric or Composite Springs
Introduction/Definition: The arrangement is called Concentric spring or Composite spring if one spring is placed inside the other spring. Purpose: A…
procedure of selection of ball bearing using manufacturer’s catalogue.
1) Calculate radial and axial forces and determine dia. of shaft. 2) Select proper type of bearing. 3) Start with extra light series for given diag…
construction of leaf spring.
Semi-elliptical leaf springs are widely used for suspension in light and heavy commercial vehicle. In car these are used for rear suspension. The le…
design procedure of sunk key
Considering a square key connecting the shaft hub. Let, T = Torque transmitted by shaft F = Tangential force acting at the circumference of d = Diame…
A shaft is required to transmit 1 MW power at 240 rpm. The shaft must not twist more than 1 degree on a length of one meter. If the modulus of rigidity for the material of shaft is 80 kN/mm2. Find the diameter of shaft and shear stress induced on it.
Torque transmitted by the shaft T= Px60/2π N= 1X106X60/2 π x240 = 39783.58 Nm =39783.58 x 103 N.mm We know that T/J=GΘ/L or J=TXL/GXΘ…
Explain the purpose of turn buckle. State its application.
A turnbuckle, stretching screw or bottle screw is a device for adjusting the tension or length of ropes, cables, tie rods, and other tensioning syste…
Condition for selection of factor of safety
Condition for selection of factor of safety 1. Effect of failure: The factors of the safety is high in applications where failure of machine pa…
Definition And Basic Procedure Of Machine Design
MACHINE DESIGN: Machine design is defined as the use of scientific principles, technical information and imagination in the description of a machin…
Factor of safety
Factor of Safety While designing a component, it is necessary to provide sufficient reserve strength in case of an accident. …
Important concepts in machine design
Machine Design:- The use of scientific principles, Imagination & Technical knowledge in the specifications of the machine or mechanical …