Volume 1, 2009DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
|Page(s)||249 - 255|
|Published online||15 September 2009|
A new technique for compression tests at intermediate strain rates: Prototype resultsT.J. Cloete and S. Oxtoby
Blast Impact and Survivability Research Unit (BISRU), Department of Mechanical Engineering, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
Published online: 15 September 2009
A prototype of a new concept for intermediate strain rate compression testing is presented. The concept uses elastic impact principles applied to a wedge mechanism to accelerate the actuation mechanism from rest to a test speed of 50 mm/s in approximately 133 μs, and maintain a near uniform strain rate of 10 s−1 to a strain of 0.2. The load frame is miniaturized and does not contain any hydraulic or pneumatic components and hence has a relatively high natural frequency of above 30 kHz, which improves the confidence with which signal processing techniques can be applied. Quasi-static and dynamic test results for commercially pure Aluminium are reported and the feasibility of future developments is discussed.
© EDP Sciences 2009