Marine machinery Drawing 5 min read
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…
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Marine machinery Drawing 2 min read
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…
Mechanics of Solids 3 min read
Viscoelasticity
The German physicist Wilhelm Weber noticed in 1835 that a load applied to a silk thread produced not only an…
Marine machinery Drawing 2 min read
SURFACE FINISH MEASUREMENT
When we are producing components by various methods of manufacturing process it is not possible to produce perfectly smooth surface…
Mechanics of Solids 6 min read
Dislocations
The Italian elastician and mathematician Vito Volterra introduced in 1905 the theory of the elastostatic stress and displacement fields created…
Mechanics of Solids 3 min read
Stress concentrations and fracture
In 1898 G. Kirsch derived the solution for the stress distribution around a circular hole in a much larger plate…
Marine machinery Drawing 3 min read
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…
Mechanics of Solids 4 min read
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,…
Mechanics of Solids 4 min read
Beams, columns, plates, and shells
The 1700s and early 1800s were a productive period during which the mechanics of simple elastic structural elements were developed—well…
Marine machinery Drawing 3 min read
Notes on hatching of sections
Hatching is generally used to show areas of sections. The simplest form of hatching may be based upon continuous thin…