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The Coefficient of Restitution Tester – A Value Making Impact

The procedure when at least two bodies hit against each other is said to be a collision. In general, a collision refers to an event in which at least two bodies/objects apply forces on each other for a very short period of time. Collisions conserve momentum. The Coefficient of Restitution (COR) is the proportion to the final relative velocity to initial relative velocity between two bodies after their collision. It typically ranges from 0 to 1 where if the calculated value is 1, the collision is said to be a perfectly elastic collision. This also means that there is no loss of kinetic energy during a collision. But if the value is calculated as 0 it does not make the collision perfectly inelastic. There are various tests conducted that calculates the coefficient of restitution tester.

Coefficient of restitution tester

The Coefficient of Restitution is denoted by ‘e’.

The coefficient of restitution is the number which shows that how much kinetic energy remains after the collisions between two bodies.

It depends upon the materials of which the two colliding bodies are made of. It is also influenced by the velocity, the size and shape of objects, the location at which collision of two objects occurred, and their temperature.

The coefficient of restitution is the measure of the restitution of collision between two colliding bodies: how much amount of kinetic energy remains for the objects to overcome from one another vs how much kinetic energy is lost in the form of heat, or the work done deforming the bodies.

There are tests that ascertain the coefficient of restitution. One of the tests is Leeb Rebound Hardness Test. This test is predominantly on substantial items and it is a non-destructive testing test. This implies the required data can be figured without causing harm or any kind of deformation to the material. The ordinary systems depend extremely much on characterized physical space hardness tests. Hard indenters of characterized measurements are continually squeezed into the material under a particular power. Distortion parameters, for a case, the indentation depth in the Rockwell technique, are recorded to give measures of hardness. Leeb guideline characterizes hardness value from the energy loss of a characterized affect body in the vigil of impacting being crashed on a metal sample.

Drop Test is another way to calculate the Coefficient of Restitution for the different type of balls. It is found that the coefficient of restitution values drop as the height of the drop is increased. It has been noted that the value of the coefficient of restitution drops as the height drop is also increasing. The variation in the material of impact surface changes varies the coefficient of restitution.

Are you flooring with high Co-efficient of Restitution Ceramic tiles

Ceramic tiles testing equipmentYou must have noticed those minute or even prominent hair line cracks on the ceramic tiles of your flooring. Some tiles also seem to break away at the ends after few years’ time. These cracks and breakages are a result of unsupported or soft layers or maybe they have not been fixed to the walls or flooring properly for support.

It is to be noted that floors are more prone to damage when it comes to ceramic tiles, as compared to walls because of falling objects and greater pressure of the furniture and human weights! The impact of resistance has been defined as per various standards as a measure for testing the strength, stamina and life of the ceramic tiles. The co-efficient of restitution is a measure used to quantify the impact of resistance. Defined by Standard EN 1441, the co-efficient of restitution helps to find out how strong the ceramic tile is with the help of a steel ball thrown from a height on the tile and see if it breaks and if it does, what is the breaking pattern.

Conditions for measuring the co-efficient of Restitution

Before the test can begin, below are the conditions that need to be set for successful and noise free testing of strength of the ceramic tiles.

  • The piece of tile to be tested from the sample needs to be fixed on a concrete slab with adhesive or glue.
  • Only when the glue has hardened a steel ball of 19 mm in diameter is dropped on it from a height of 1 m.
  • The time differences are now captured between the first and second impact on the tile.

If the ceramic tile survives, it means there is no energy loss and there is no damage on the tile and you can purchase it without any doubt! One of the key things to consider in ceramic tiles is their strength to bear the impact of falling objects and the pressure of heavy furniture. In this case, where there is no energy loss, it mean the co-efficient of restitution is valued at 1. The ceramic tiles with co-efficient of restitution at 0.5 mean it will develop minor hair line cracks and slight breakages and that it will be less strong than the previous one.

It is always advisable to consult a leading manufacturer of ceramic tiles so that you get quality tested ceramic tiles with a high co-efficient of restitution so that they stand the test of time. Before finalising check for the certification details and magnitudes of dimensionless measure to validate the quality and strength of the ceramic tiles.

Not only is the interior beauty of your rooms or office important, it is also equally important to make sure that the tiles are able to endure the weight and pressure of the furniture and other objects. Most important for the ceramic tiles is the impact of falling objects and the height from which the object falls as the energy and pressure exerted on the ceramic tiles increases. The glazed tiles or the ones which are porous are easily affected by pointed objects compared to the unglazed vitrified ones.

Only go for those which have passed these tests, reach out to the leading ceramic tiles testing equipment manufacturer today for nothing less than the best!