Dynamic Tensile Behavior of Concrete: Experiment and Numerical Analysis

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Title: Dynamic Tensile Behavior of Concrete: Experiment and Numerical Analysis

Author(s): Ahmed Brara and Janusz R. Klepaczko

Publication: Materials Journal

Volume: 101

Issue: 2

Appears on pages(s): 162-167

Keywords: concrete; spalling; tensile strength.

DOI: 10.14359/13065

Date: 3/1/2004

Abstract:
High strain rate tension tests have been conducted at the Laboratory of Physics and Mechanics of Materials (LPMM)-Metz on cylindrical specimens of wet microconcrete using a new experimental technique. This new arrangement, based on the principle of Hopkinson bar combined with the phenomenon of spalling, permits a strain rate in tension above 100 1/s. Such high strain rates in tension are very difficult to reach for concrete. In addition, the experimental setup was equipped with six high-frequency and high-resolution charged coupled device (CCD) cameras operating up to 106 frames per s. The CCD cameras were used to record the whole process of specimen fracturing by spalling. Numerical analyses by a finite element (FE) code were performed on specimen behavior and spalling. In all FE analyses, the specimen behavior was assumed as elastic with a local cumulative failure criterion. In this paper, the experimental technique is briefly presented and the test results reported are compared with numerical calculations.


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