Basic Principles
In addressing any problem in continuum or solid mechanics, three factors must be considered: (1) the Newtonian equations of motion, in the more general form recognized by Euler, expressing conservation…
Computational mechanics
The digital computer revolutionized the practice of many areas of engineering and science, and solid mechanics was among the first fields to benefit from its impact. Many computational techniques have…
Methods of measuring surface finish
The methods used for measuring the surface finish is classified into 1. Inspection by comparison 2. Direct Instrument Measurements 1. Inspection by comparison methods: In these methods the surface texture is assessed by…
Analysis of surface finish
The analyses of surface finish being carried out by 1. The average roughness method. 2. Peak to valley height method 3. From factor 1. Average roughness measurement The assessment of average roughness is carried…
Viscoelasticity
The German physicist Wilhelm Weber noticed in 1835 that a load applied to a silk thread produced not only an immediate extension but also a continuing elongation of the thread…
SURFACE FINISH MEASUREMENT
When we are producing components by various methods of manufacturing process it is not possible to produce perfectly smooth surface and some irregularities are formed. These irregularities are causes some…
Dislocations
The Italian elastician and mathematician Vito Volterra introduced in 1905 the theory of the elastostatic stress and displacement fields created by dislocating solids. This involves making a cut in a…
Stress concentrations and fracture
In 1898 G. Kirsch derived the solution for the stress distribution around a circular hole in a much larger plate under remotely uniform tensile stress. The same solution can be…
PRODUCTION DRAWING LIMITS, FITS AND TOLERANCE
Limit system There are three terms used in the limit system: 1. Tolerance: Deviation from a basic value is defined as Tolerance. It can be obtained by taking the difference between the…
The general theory of elasticity
Linear elasticity as a general three-dimensional theory began to be developed in the early 1820s based on Cauchy’s work. Simultaneously, Navier had developed an elasticity theory based on a simple…
