Heat Exchanger Analysis

The flow in the heat exchanger is considered under steady-state and fully insulated at the outer surface. Consider an infinitesimal part of the heat exchanging tube of area dA, where temperatures of hot and cold fluid are Th and Tc, respectively. The figure below shows the temperature profile along the direction of flow in parallel […]

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types of keys

Types of Keys (Mechanical)

A key is a machine element fitted in an axial direction into the mating member, such as pulleys, gears. The primary function of the key is to prevent the relative rotation between the shaft and mating member. In most of the applications, the secondary function of the keys is to prevent the relative rotation between […]

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Electrical machines safety

Safety Measures while Working with Electrical Machines

When operating with electrical machines, operator or user for the first time should be careful to avoid accidents. Based on the experience of many experts, some rules and regulations have been made for the handling of electrical appliances. In industry, an inquiry is normally ordered for the electrical accident. Items carrying electricity should be properly insulated. Aging of […]

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rocket propellant combustion

Rocket Propellant: Solid and Liquid

The rocket propellant is the chemical mixture burned to produce thrust in rockets and consists of a fuel and an oxidizer. Fuel is a substance that can be in a liquid or solid state, burns when combined with oxygen producing gases for propulsion. An oxidizer is an agent that releases oxygen in combination with a […]

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Deburring Operation

Deburring Operation on Burrs

Deburring Operation The deburring operation is performed by the deburring tool to remove burrs. Burrs are thin ridges, usually triangular in shape and they are usually an unwanted piece of material that develop along the edges of a workpiece from operations such as machining, shearing sheet metal, and trimming forgings, castings. Burrs can be detected by simple means, such […]

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Drill bits made of High Speed Steels

High-Speed Steels (HSS)

High-Speed Steels (HSS) are the cutting tool materials used for machining of materials. The HSS will be used for machining of materials. The General use of HSS is 18-4-1. 18% of Tungsten or Molybdenum, used for increasing hot hardness temperature of tool material. 4% of Chromium, used for increasing the strength of resistance to deformation of […]

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processing steps involved in making ceramics parts

Shaping Ceramics

Several techniques (slip casting, extrusion, dry pressing, wet pressing, hot pressing, isostatic pressing, jiggering and inspection molding) are available for processing ceramics into useful products (shown in below table 1), depending on the type of ceramics involved and their shapes. Production of some ceramic parts (such as pottery, floor tiles) generally doesn’t involve the same […]

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Shielding Gas Cylinders

Shielding Gases

Shielding gas is commonly used in factories to prevent the molten metal from the harmful effect of the air. Even small amounts of oxygen in the air will oxidize the alloying elements and create slag inclusions. Nitrogen is solved in the hot melted material but when it solidifies the solubility decreases and the evaporating gas […]

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Saint-Venant’s Principle and Stress Concentrations

Saint-Venant’s Principle and Stress concentration

Saint-Venant’s principle states that if the forces acting on a small portion of an elastic body are replaced by a statically equivalent system of forces on the same portion of the surface, the effect upon the stresses in the body is negligible except in the immediate area affected by the applied forces. The stress field remains unchanged in areas of the body […]

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