First application of the 3D-MHB on dynamic compressive behavior of UHPC

Cadoni, Ezio and Dotta, Matteo and Forni, Daniele and Riganti, Gianmario and Albertini, Carlo (2015) First application of the 3D-MHB on dynamic compressive behavior of UHPC. In: EPJ Web of Conferences DYMAT 2015 - 11th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading, 07.09.2015-11.09.2015, Lugano, Switzerland.

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Abstract

In order to study the dynamic behaviour of material in confined conditions a new machine was conceived and called 3D-Modified Hopkinson Bar (3D-MHB). It is a Modified Hopkinson Bar apparatus designed to apply dynamic loading in materials having a tri-axial stress state. It consists of a pulse generator system (with pre-tensioned bar and brittle joint), 1 input bar, and 5 output bars. The first results obtained on Ultra High Performance Concrete in compression with three different mono-axial compression states are presented. The results show how the pre-stress states minimize the boundary condition and a more uniform response is obtained.

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