Experimental Mechanics

, Volume 51, Issue 4, pp 537–563 | Cite as

Ultra High Speed DIC and Virtual Fields Method Analysis of a Three Point Bending Impact Test on an Aluminium Bar

  • F. PierronEmail author
  • M. A. Sutton
  • V. Tiwari


This paper deals with the analysis of an aluminium beam impacted in a three point bending configuration using a Hopkinson bar device. Full-field deformation measurements were performed using Digital Image Correlation on images captured with an ultra high speed camera (16 frames at a time resolution of 10 μs). The performance of the deformation and strain measurements were evaluated and the data were then used quantitatively to analyse the very complex dynamic behaviour of the beam. It was shown that the deformation of the beam was controlled by the interaction between the striker and the flexural bending wave triggered by the initial impact. The principle of virtual work was used to reconstruct the impact force from the shear strains and to analyze how this impact force relates to the acceleration of the specimen (inertia forces) and the development of the bending stresses. The results are in good agreement with expectations. This opens up new perspectives in the quantitative use of full-field measurements to extract elasto-plastic constitutive parameters from such impact tests.


Ultra high speed imaging Impact Three point bending Hopkinson bar Virtual Fields Method Full-field measurements 


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Copyright information

© Society for Experimental Mechanics 2010

Authors and Affiliations

  1. 1.Laboratoire de Mécanique et Procédés de FabricationArts et Metiers ParisTechChâlons en ChampagneFrance
  2. 2.Department of Mechanical EngineeringUniversity of South CarolinaColumbiaUSA

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