journal article·2025-09-19Open access

Hybrid FEM/SPH Modeling and CT Analysis of Dynamic Damage in Structural Steel Under Impact Loading

Dariusz Pyka, Adam Kurzawa, Grzegorz Ziółkowski, Maciej Roszak, Martyna Strąg

Applied Sciences· Volume 15· Issue 18

Abstract

This study analyzed the dynamic behavior of EN C45 structural steel under impulse loading generated by a pressure wave. The experiments were conducted on a special test rig using two load configurations: (I) direct contact of the load with the sample surface and (II) detonation at a distance of 30 mm. Depending on the loading conditions, the specimens were fragmented or developed extensive internal cracks and plastic deformations. To complement the experimental program, hybrid numerical simulations were performed using the finite element method (FEM), smoothed particles hydrodynamics (SPH), and coupled Euler–Lagrange (CEL) approach. A modified Johnson–Cook (JC) model was used to account for dynamic damage and cracks. Computed tomography (CT) and metallographic analyses provided detailed information on the formation of cracks in MnS inclusions, brittle cracks near the sample axis, and shear deformation zones away from the axis. These observations allowed direct correlation with the predicted numerical deformation and damage fields. The innovative nature of this work lies in the combination of three complementary computational techniques with computed tomography analysis and microstructure analysis, providing a comprehensive framework for describing and confirming the mechanisms of damage and fragmentation of structural steels under explosive loading.
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Research context

OpenAlex topics: High-Velocity Impact and Material Behavior · Fluid Dynamics Simulations and Interactions · Metal Forming Simulation Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Mechanics, Materials and Biomedical Engineering, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland

Department of Lightweight Elements Engineering, Foundry and Automation, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland

Department of Advanced Manufacturing Technologies, Wrocław University of Science and Technology, Łukasiewicza 5, 50-371 Wrocław, Poland

Military Institute of Armament Technology, Prymasa Stefana Wyszyńskiego 7 Street, 05-220 Zielonka, Poland

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