Mechanics of Herbert Pendulum Hardness Tester and its Application

Radim Halama; Jiří Podešva; Ryosuke Suzuki; Masaaki Matsubara; Rostislav Čech

doi:10.4028/www.scientific.net/KEM.741.122

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 741Mechanics of Herbert Pendulum Hardness Tester and...

Mechanics of Herbert Pendulum Hardness Tester and its Application

Abstract:

The knowledge of classical mechanics gives deeper insight into the Herbert hardness tester applicability for material testing. Elastic materials with low friction presence between contact surfaces are supposed to be investigated in this study. Firstly the dynamics approach is used to obtain simplified solution of swing angle. Then a new solution of the problem is gained by means of an energy approach. Slight decrease of the swing angle is predicted by the new solution as also shown in experiments. After comparison of both solutions a new formulae useful for evaluation of rolling resistance coefficient is applied for measurements performed on some metallic materials and artificial sapphire. Rolling resistance coefficients obtained by the way are always less than maximal estimated value.

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Periodical:

Key Engineering Materials (Volume 741)

Pages:

122-127

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.741.122

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Online since:

June 2017

Authors:

Radim Halama*, Jiří Podešva, Ryosuke Suzuki, Masaaki Matsubara, Rostislav Čech

Keywords:

Dynamics, Hardness Measurement, Herbert Pendulum, Rolling Resistance

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References

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