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Principles of Energy Conversion
Published in Hamid A. Toliyat, Gerald B. Kliman, Handbook of Electric Motors, 2018
Hamid A. Toliyat, Gerald B. Kliman
The scleroscope hardness is determined by dropping a special diamond-tipped weight on a specimen and measuring the height of the rebound. This hardness measurement is, to some Table 11.15 Characteristics, Descriptions, and Typical Applications for Various Types and Grades of Brushes extent, an indication of the resilience of the carbon material. Hardness measurements obtained in this manner are not interpreted as absolute units, but as relative values for comparative purposes. Hardness alone should not be used as the sole basis for determining the quality of a brush. Several points of variation in hardness alone may have no pronounced effect on brush performance.
Mechanical testing
Published in William Bolton, R.A. Higgins, Materials for Engineers and Technicians, 2020
This is a small portable instrument which can be used for testing the hardness of large components such as rolls, drop-forgings, dies, castings and gears. Such components could not be placed on the table of one of the more orthodox machines mentioned earlier. The scleroscope embodies a small diamond-tipped ‘tup’, or hammer, of mass approximately 2.5 g, which is released so that it falls from a standard height of about 250 mm inside a graduated glass tube placed on the test surface. The height of rebound is taken as the hardness index.
Hardness and Impact Tests
Published in John Bird, Newnes Engineering Science Pocket Book, 2012
Examples of dynamic hardness tests are those using the Herbert pendulum Hardness Tester and the Shore Scleroscope. The former uses an arched rocker resting on a steel or diamond pivot; hardness can be indicated by the time taken for ten swings or by the difference between an initial angular displacement and the first swing. The Scleroscope is a portable apparatus in which a diamond-tipped hammer falls on to the material under test. The height of the rebound gives the hardness number.
Biomechanical performance design of joint prosthesis for medical rehabilitation via generative structure optimization
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2020
Jinghua Xu, Kang Wang, Mingyu Gao, Zhengxin Tu, Shuyou Zhang, Jianrong Tan
The material hardness can be measured by Brinell (HB), Rockwell (HRA, HRB, HRC), Vickers hardness (HV) and Shore scleroscope hardness(HS). The relative density of printed object can be defined as