Investigation on the Dynamic Behavior of AlgoTuf 400F Steel – Part 1: Constitutive Strength Model

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Authors
  1. Toussaint, G.
Corporate Authors
Defence Research and Development Canada, Valcartier Research Centre, Quebec QC (CAN)
Abstract
In order to improve finite element simulation predictions of a dynamic event such as a blast or a ballistic impact on a structure, the dynamic behavior of the materials involved has to be investigated. The information gathered from this investigation can then be further used to choose the constitutive material model as well as identified its parameters. In this paper, the main objective is to share the findings from this investigation for the AlgoTuf 400F steel. The first section of the paper presents the quasi-static test that were performed by Defence Research and Development Canada (DRDC) as well as the split Hopkinson pressure bar (SHPB) tests that were performed at a strain rate between 10³ and 104 s-1. These experimental data showed that at low strain rates, the material did not exhibit exactly the same behavior in the rolling direction (longitudinal direction) compared to the transverse one. It was also found that at higher strain rates, the effect of the manufacturing method on the properties through a 25.4 mm (one inch) thick plate could be neglected. Nevertheless, the material has showed sensitiveness to the strain rate and this was taken into consideration in the constitutive material model. In the second section, the plasticity parameters identified for the simplified Johnson-Cook constitutive strength model obtained using these experimental data are presented. The third section describes the 2D axisymmetric finite elem
Keywords
AlgoTuf;SHPB;Johnson-Cook;Finite element simulation;Air blast;Square plate
Report Number
DRDC-RDDC-2017-N016 — External Literature
Date of publication
16 Oct 2017
Number of Pages
13
DSTKIM No
CA045213
CANDIS No
805606
Format(s):
Electronic Document(PDF)

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