Microforce Material Tester Using Small Pendulum II
A method of inexpensive material tester based on the levitation mass method is improved. The tester is composed of an interferometer with Zeeman type two frequency He-Ne laser and a small pendulum as a substitute for a pneumatic linear bearing. As an example of a material tester using the pendulum, which evaluates the mechanical response of general objects against impact forces, is developed. The characteristics of the restoring force are measured under the free-swing condition. To demonstrate the performance of the developed instrument, the viscoelasticity of a gel block under an impact load is evaluated.
Osamu Hanaizumi, Masafumi Unno and Kenta Miura
J. Ozawa et al., "Microforce Material Tester Using Small Pendulum II", Key Engineering Materials, Vol. 497, pp. 169-175, 2012