In the world of physics, there are three basic types of resonance that are studied: phase resonance, amplitude resonance and natural resonance. Regardless of type, all resonance shares some of the same qualities, including the ability to both store and to transfer energy between two different forms of storage mode. All energy when transferred from one mode to another will suffer a loss, which is referred to as damping. This phenomenon occurs during the cycles of transfer from one mode of storage to another.

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All materials, whether they are plastic or metal, can be subject to failure and eventually will succumb to fatigue failure. Thinner, more brittle materials may break more quickly, while thicker more flexible materials can take more weight or movement before breakage occurs. In the case of all materials, failure typically refers to damage that prevents the material and components from working correctly or to complete breakage.

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During the building procedure, whether it is a small item or a huge building, there are several things that have to be considered. The materials that are used have to be strong enough to perform under the specified stresses but flexible and cost effective. They also have to be reliable under the expected conditions that they will be used under.

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Impact force is described as a force that delivers a shock or a high impact, typically for a short period of time. Impact force applies when something falls or is dropped from above or when two or more bodies collide with one another. The effect of the impact force might depend on a number of factors including the relative velocity of those bodies to one another. The faster the bodies are moving, the higher the impact’s force will register.

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Whenever anything is built, there are several tests that have to be performed. These tests are not only meant to prove safety of the material, machine or component, but its effective and expected life in general as well. All materials, regardless of their components will eventually wear out, leading them to break or become destroyed. This damage is the direct result of fatigue.

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Metal, one of the most commonly used materials in most applications, is an umbrella term for many different specific metal types. Each type of metal has its own pros and cons, including how many cycles it can handle before fatigue sets in. When working with metal, fatigue relates to the number of cycles that the material can handle before failure. Failure may or may not mean total breakage, depending on the type of material and the main use. For instance, a helicopter blade has to be in perfect shape before each flight or it may fail in mid air.

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Sorbothane is a material that has a number of applications related to spring rate. Spring rate is an important consideration when choosing the size and number of coils in an application. There are several things to keep in mind when working with anything requiring spring rate, including the benefit of a higher or lower spring rate.

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The shock response spectrum is a method of testing and graphing certain types of behavior related to shock and materials that increase, decrease or have no effect on the shock. It is a graphical description of this shock and looks at how certain types of systems will respond to it. For instance, the easiest to study is the Single Degree of Freedom system, or in other words, a coiled spring.

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The tangent of delta, also called tan delta is a test which is used to determine how much the insulation of certain types of cable has deteriorated. All types of materials used as insulation for these cables, usually medium to high are affected by different conditions, which is why they are so carefully evaluated before being installed. For instance, one type of material may be more affected by being exposed to the air or the sunlight.

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Compressive stress relates to the way that motion may compact a material, especially materials that have two surfaces making contact with one another. A prime example of this type of stress is the insoles of your shoes. When you run or exercise, the pounding of your feet inside of your shoes will compact all of the material that is in there. Eventually, it will stop giving you the cushiony response that you expected and wanted when you bought these shoes. The more that you run or the more that you weigh, the faster this will happen.

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