What You Should Know Before Abrasion Testing

Abrasion testing is of interest in a number of technical fields, including civil and mechanical engineering,reliability engineering, metallurgy, and geology. These tests are of importance in ensuring the durability of a material in a particular product or application,and in ensuring that material that erodes because of abrasion does not cause environmental or safety hazards in the production or test environments or in use of the product. Before abrasion testing,you should know these points: Condition of specimen: The fabric should be conditioned and tested in a standard testing atmosphere. Choice of testing instrument: The choice of testing instrument may be dependent upon the character of the testing desired, e .g-flat abrasion, flexing abrasion, etc. Choice of abrasive motion: The rubbing movement may be reciprocating, rotary or multidirectional. Direction of abrasion: The direction of abrasion can be at angles to the warp and weft directions. Choice of abradant: The severity of the abrasion will vary with the nature of abradant. For example: steel and silicon carbide give constant abrasive qualities. A standard worsted or canvas fabric, emery cloth of various grade are also used as abradant. Backing the specimen: The hardness of the backing of the specimen may affect the results. In some testes a hard backing is used, in others a felt or foam rubber. Cleanliness of the specimen and instrument: The region to be abraded should be handled as little as possible and be free from foreign matter such as graphite of pencils. The accessories of the instrument which may rub the fabric must be spotlessly clean and free from grease. Tension on the specimen: Standard method of mounting the specimen should be used to avoid errors due to variation in the tension used. The pressure between abradant and specimen: The severity of the abrasion will be affected by the pressure applied. So suitable standard must be set up. The end point of the test: The test should be frequently stopped as soon as the hole appeases or the specimen breaks by automatic stop motion.