Issue
DYMAT 2009
Volume 2, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 1831 - 1837
Section Numerical Simulations
DOI https://doi.org/10.1051/dymat/2009257
Published online 15 September 2009
DYMAT 2009 (2009) 1831-1837
DOI: 10.1051/dymat/2009257

Numerical simulation of dynamic four-bending-tests using a modified Split Hopkinson Pressure Bar

J.A. Loya1, L. Rubio2 and J. Fernández-Sáez1

1  Department of Continuum Mechanics and Structural Analysis, Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911 Leganés, Madrid, Spain
2  Department of Mechanical Engineering, Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911 Leganés, Madrid, Spain


Published online: 15 September 2009

Abstract
In this work, we present a three-dimensional full numerical simulation of the dynamic four-point bending test performed in a modified split Pressure Hopkinson Bar (SHPB). The study is mainly focused on the obtaining of the dynamic Stress Intensity Factor (SIF) from the displacement of the contact points between the specimen and the bars or, alternatively, from the Crack Mouth Opening Displacements (CMOD) assuming that the relationship between these variables and the SIF deduced for static conditions is applicable to the dynamic one. The results derived from the two analysed methods are compared with those obtained from the direct numerical calculation. We conclude that both procedures lead to adequate estimations of the temporal evolution of the SIF, although the best results are achieved through the CMOD. However, the application of this method requires more complex experimental equipment.



© EDP Sciences 2009