Elastic Springs and Bearings in Mechanical Systems
Elastic Springs and Bearings
Elastic springs and joints are used to absorb energy or shock loads, acting as elements in an engine or power source, and to produce a force or pressure.
Springs
Springs are items that possess the property of *elasticity*, meaning the ability to deform when subjected to an external force, absorbing energy, and then returning to their initial position, releasing the absorbed energy when the force is removed.
The most important types of springs include:
- Tensile (or Traction)
Titanium Dioxide: Properties, Applications, and Safety
Oxygen Sensors
Even in slightly reducing atmospheres, Titania tends to lose oxygen and become sub-stoichiometric. Thus, the material becomes a semiconductor, and the electrical resistance of the material can be correlated with the oxygen content of the atmosphere to which it is exposed.
Antimicrobial Coatings
The photocatalytic activity of titanium results in thin layers of material exhibiting self-cleaning and disinfecting properties under exposure to UV radiation. These properties make the material
MIG/MAG Welding: Principles, Parameters, and Equipment
MIG/MAG Welding Principles
MIG/MAG welding is a process where an arc is established between a continuous wire electrode and the workpiece. It is protected by an inert gas (MIG) or an active gas (MAG).
Process Types:
- Semiautomatic: Voltage, speed, intensity, and flow are pre-regulated. The torch is moved manually.
- Automatic: All parameters are pre-regulated, and the application is automatic.
- Automated: All parameters are programmed by a specific unit.
This welding type is used for low and medium carbon
Read MoreMasonry and Marble Work: Techniques and Installation
Masonry Walls
To achieve a perfect interweaving in masonry walls, the touchstone should be arranged or indented to decrease the size of large masonry piers. This involves careful arrangement of strings and executioners.
Marble Work and Construction Techniques
Marble work is related to stonework but differs in the material used. Marble is more luxurious than the stone used in masonry and can be polished. It is usually available in plaques for coating walls. This activity is more refined and delicate
Read MoreUnderstanding Linear, Volumetric Expansion, and Essential Hand Tools
Linear Expansion
Different substances exhibit varying degrees of expansion. Dilation specifies the change in length of a substance per degree Celsius (°C) of temperature change. Its units are (units of length) / (°C). It’s low in poor conductors of heat and high in good conductors of heat.
Formula:
(Lf – Lo) = (Tf – To) . Lo . h
Where:
- Lf = Final Length
- Lo = Original Length
- Tf = Final Temperature
- To = Original Temperature
- h = coefficient of linear expansion
Everything should be reduced to mm.
Formula 2:
Lf
Read MoreMaterial Science: Plastics, Textiles, Ceramics, and Stone
Material Science: An Overview
Plastics
Plastics are classified as:
- Thermoplastics: Obtained from oil-derived compounds, they soften when heated.
- Thermosets: Formed by chains linked strongly in different directions, they become rigid and can only be heated once.
- Elastomers: Obtained by vulcanization (invented by Charles Goodyear), they consist of chains attached laterally and folded back on themselves.
Plastic Co-formation Techniques
Common co-formation techniques used include:
- Extrusion: Thermoplastic material