Monday, 27 May 2019
Strong Structures with Triangles
Why the triangles are very important for make a structure stable:
Etiquetas:
Structures
Saturday, 16 March 2019
MECHANISM
Mechanisms allows objects to move. They transmit and transform force and motion from a motor to a a receptor. They make work easier and more comfortable for human beings.
- Linear transmission of motion:
- Levers
Class 1 | Class 2 | Class 3 |
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It has the turning point(fulcrum) between the load and the effort. |
It has the load between the fulcrum and the effort | It has the effort between the fulcrum and the load |
what is a lever?
Types of levers:
- Pulleys:
The pulley is a simple machine made with a wheel and a rope or chain. There are three types of pulleys: - Fixed pulley: The pulley is balanced when the force we apply F is equal the load R.
- Movable pulley: It`s a set of two pulleys, one fixed and another with linear movement
- Compound pulley system: a special combination of fixed and movable pulleys.
pulley to climb |
Timing belt in cars |
Watch this video about pulleys:
- Rotary transmission:
- Friction wheels
- https://youtu.be/04jEqln4SRI
- Pulleys with belts
- Gears
- Sprockets with chains
pulley with belts |
- Transformation of motion:
- Winch and crank mechanism
- Rack and pinion mechanism
- http://www.technologystudent.com/gears1/gears4.htm
- http://www.technologystudent.com/gears1/drlgear.htm
- Crank and Rod mechanism
Etiquetas:
Mechanism
Wednesday, 13 February 2019
FORCES AND LOADS
When a force acts on a structure, that force becomes a load to the structure.
A typical load that acts on a structure is it's own self-weight or gravitational force. Your own body weight is a load on your skeleton.
There are basically two types of generic loading on a structure:
- Permanent load: it doesn't vary over the time (e.g. own weight).
- Variable load: it varies over the time (e.g. weight of snow).
There are typically 5 different types of stress:
a) Tension
b) Compression
c) Shear
d) Bending
e) Torsion
b) Compression
c) Shear
d) Bending
e) Torsion
Etiquetas:
Structures
Friday, 8 February 2019
TYPES OF STRUCTURES
A structure is a set of elements arranged in an optimum way to support a body or an object.
The structure of an object is the ordely distribution of its essential part. This is what gives the object its shape.
Most large structures are one of the following types: mass, frame, truss, vaulted, shell, geodesic or pneumatic.
In the next video you can see examples of the different types of structures.
The structure of an object is the ordely distribution of its essential part. This is what gives the object its shape.
Most large structures are one of the following types: mass, frame, truss, vaulted, shell, geodesic or pneumatic.
In the next video you can see examples of the different types of structures.
Etiquetas:
Structures
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