Compression Testing Using a CAM-Driven Electromagnetic Machine
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Date
2012-07-18
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Abstract
This paper presents new equipment for the compression testing of materials under high
rates of loading. The equipment consists of an electromagnetic actuator, a fixed housing
containing two flat compression platens, a translating cam and a follower. The
electromagnetic actuator makes possible reaching high strain rates with a very precise
control of the impact velocity and of the energy transmitted to the translating cam. The
cam profile enables compression testing to be performed under the strain-rate vs. strain
loading paths that are commonly found in manufacturing in order to meet the machine-tool
and process combined specifications. The equipment was designed, fabricated and
instrumented by the authors and, besides giving constructive details for those readers that
may be interested in developing a low-cost equipment for compression testing at high
rates of loading, the paper also puts emphasis on the flexibility and adequacy of its
operative conditions for determining the mechanical behaviour of Aluminium AA1050-O
under different testing conditions.
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Keywords
compression testing, electromagnetic, flow curve