Our new Encasement Service for Pressure Indicating Film offers engineers in the flexo, converting and packaging industries the ability to have Fujifilm Prescale protected so that it can measure contact pressure. Sensor Products now introduces our new in-house surface stress analysis service. Via video-conferencing you can view the results of our analysis practically in real-time.
We offer custom laser cutting services for tactile pressure sensor film to measure contact pressure. Sensor Products offers a variety of products that are available for short and long term lease. A lease will enable you to gain access to the benefits of our products without the commitment to buy. Furthermore, after your analysis you can also send the session data back to us for a more in-depth review and critique. Sensor Products has a highly dedicated team of talented engineers with 25 years of combined experience in the niche discipline of tactile surface sensing.
Your project will be supervised by a product manager who will be your direct contact, and worked upon by our staff consists of material, mechanical, and PHD level electrical engineers. Compression Force is the application of power, pressure, or exertion against an object that causes it to become squeezed, squashed, or compacted. Objects routinely subjected to compression forces include columns, gaskets, disc brakes, and the components of fuel cells.
Since columns are used to support structures, they are always subjected to axial compression forces. By studying columns, one can get an understanding of the failures caused by compression forces. The effects of such forces depend upon the geometry of the column and the physical properties of the column material. Under compression, short columns are dominated by their material strength limits. Figure 1 shows the failures that occur in ductile and brittle columns. Similarly, when the force applied is external in nature, the spring gets stretched and a tension force is said to be present.
When a person walks or runs, the pressure is exerted on the shoe by the foot of the person and the reaction force applied by the ground. This tends to develop a significant amount of compression force on the shoe sole, which deforms the shape of the shoe temporarily. The magnitude of the compression force depends upon the weight of the body, which further depends on the magnitude of gravitational force acting on it.
When the piston of the bicycle pump is pulled up, it sucks the air. The air enters the pump through the inlet and gets deposited in the chamber. When the piston is pushed downwards, the inlet gets closed. This compresses and forces the air to leave the chamber through the outlet. Hence, the working of a bicycle pump is highly dependent on the action of compression force.
A sponge is one of the best examples that demonstrate the existence of compression force in real life. By definition, the compressive strength of a material is the value of uniaxial compressive stress meaning the maximum compressive stress a material reaches before it fails completely. This is plotted on a stress-strain curve. To give some perspective on how these numbers are used in a building, standard buildings require concrete to meet a compressive strength of 10 MPa to 60 MPa between and pounds per square inch.
Ultra-high-strength concrete, obtained through special mixes, can meet strength requirements of MPa 72, psi. Engineers measure the compressive strength of wood by loading a block of wood parallel to the grain until it fails breaks.
They measure this in psi pounds per square inch. Ductile metal material compression strength can be measured using a universal testing machine, where the material is placed between two plates and put under compression until a specific load is reached or the material fails.
One of the most important engineering properties of concrete is its high compression strength. However, relative to steel it has a weak tensile strength. Steel can have both a high compressive strength and high tensile strength and can resist the same compressive forces as concrete or masonry but without the bulk.
For example, if a book slides across the surface of a desk, then the desk exerts a friction force in the opposite direction of its motion. Friction results from the two surfaces being pressed together closely, causing intermolecular attractive forces between molecules of different surfaces.
As such, friction depends upon the nature of the two surfaces and upon the degree to which they are pressed together. The maximum amount of friction force that a surface can exert upon an object can be calculated using the formula below:. The friction force is discussed in more detail later on this page. The air resistance is a special type of frictional force that acts upon objects as they travel through the air. The force of air resistance is often observed to oppose the motion of an object.
This force will frequently be neglected due to its negligible magnitude and due to the fact that it is mathematically difficult to predict its value. It is most noticeable for objects that travel at high speeds e. Air resistance will be discussed in more detail in Lesson 3. The tension force is the force that is transmitted through a string, rope, cable or wire when it is pulled tight by forces acting from opposite ends.
The tension force is directed along the length of the wire and pulls equally on the objects on the opposite ends of the wire. The spring force is the force exerted by a compressed or stretched spring upon any object that is attached to it. An object that compresses or stretches a spring is always acted upon by a force that restores the object to its rest or equilibrium position.
For most springs specifically, for those that are said to obey " Hooke's Law " , the magnitude of the force is directly proportional to the amount of stretch or compression of the spring. A few further comments should be added about the single force that is a source of much confusion to many students of physics - the force of gravity.
As mentioned above , the force of gravity acting upon an object is sometimes referred to as the weight of the object. Many students of physics confuse weight with mass. The mass of an object refers to the amount of matter that is contained by the object; the weight of an object is the force of gravity acting upon that object.
Mass is related to how much stuff is there and weight is related to the pull of the Earth or any other planet upon that stuff. The mass of an object measured in kg will be the same no matter where in the universe that object is located. Mass is never altered by location, the pull of gravity, speed or even the existence of other forces.
For example, a 2-kg object will have a mass of 2 kg whether it is located on Earth, the moon, or Jupiter; its mass will be 2 kg whether it is moving or not at least for purposes of our study ; and its mass will be 2 kg whether it is being pushed upon or not. On the other hand, the weight of an object measured in Newton will vary according to where in the universe the object is.
Weight depends upon which planet is exerting the force and the distance the object is from the planet. Weight, being equivalent to the force of gravity, is dependent upon the value of g - the gravitational field strength.
On earth's surface g is 9. On the moon's surface, g is 1. Go to another planet, and there will be another g value. Furthermore, the g value is inversely proportional to the distance from the center of the planet.
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