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Testing Aluminum Alloy from Quasi-static to Dynamic Strain-rates with a Modified Split Hopkinson Bar Method

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Abstract

An aluminum alloy1 was tested at quasi-static to dynamic strain-rates (from 10−1 to 5 103 s−1), using a single measuring device, a modified Split Hopkinson Bar. A wave separation technique [Bussac et al., J Mech Phys Solids 50:321–350, 2002] based on the maximum likelihood method was applied to process the strain and velocity measurements recorded at various points on each bar. With this method, it is possible to compute the stress, strain, displacement and velocity at any point on the bar. Since the measurement time is unlimited, the maximum strain measured in a given specimen no longer decreases with the strain-rate, as occurs with the classical Split Hopkinson Bar method.

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Authors and Affiliations

  1. Laboratoire de Mécanique des Solides, Ecole Polytechnique, 91128, Palaiseau, France

    R. Othman & G. Gary

  2. Institut de Recherche en Génie Civil, Ecole Centrale de Nantes, 1 Rue de la Noë BP 92101, 44321, Nantes Cedex 3, France

    R. Othman

Authors
  1. R. Othman
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  2. G. Gary
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Correspondence to R. Othman.

Additional information

1The authors wish to thank the automobile manufacturer who provided samples of the alloy used in this study. For reasons of commercial and industrial confidentiality, we were not informed about the composition of this alloy.

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Othman, R., Gary, G. Testing Aluminum Alloy from Quasi-static to Dynamic Strain-rates with a Modified Split Hopkinson Bar Method. Exp Mech 47, 295–299 (2007). https://doi.org/10.1007/s11340-006-9023-7

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  • DOI: https://doi.org/10.1007/s11340-006-9023-7

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