Coupled discrete/continuum simulations of the impact of granular slugs with clamped beams: stand-off effects
Coupled discrete particle/continuum simulations of the normal (zero obliquity) impact of granular slugs against the centre of deformable, end-clamped beams are reported. The simulations analyse the experiments of Uth et al. (2015) enabling a detailed interpretation of their observations of temporal...
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Elsevier
2018
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| author | Goel, A. Uth, T. Liu, Tao Wadley, H.N.G. Deshpande, V.S. |
| author_facet | Goel, A. Uth, T. Liu, Tao Wadley, H.N.G. Deshpande, V.S. |
| author_sort | Goel, A. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Coupled discrete particle/continuum simulations of the normal (zero obliquity) impact of granular slugs against the centre of deformable, end-clamped beams are reported. The simulations analyse the experiments of Uth et al. (2015) enabling a detailed interpretation of their observations of temporal evolution of granular slug and a strong stand-off distance dependence of the structural response. The high velocity granular slugs were generated by the pushing action of a piston and develop a spatial velocity gradient due to elastic energy stored during the loading phase by the piston. The velocity gradient within the “stretching” slug is a strong function of the inter-particle contact stiffness and the time the piston takes to ramp up to its final velocity. Other inter-particle contact properties such as damping and friction are shown to have negligible effect on the evolution of the granular slug. The velocity gradients result in a slug density that decreases with increasing stand-off distance, and therefore the pressure imposed by the slug on the beams is reduced with increasing stand-off. This results in the stand-off dependence of the beam's deflection observed by Uth et al. (2015). The coupled simulations capture both the permanent deflections of the beams and their dynamic deformation modes with a high degree of fidelity. These simulations shed new light on the stand-off effect observed during the loading of structures by shallow-buried explosions. |
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| format | Article |
| id | nottingham-41234 |
| institution | University of Nottingham Malaysia Campus |
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| last_indexed | 2025-11-14T19:44:38Z |
| publishDate | 2018 |
| publisher | Elsevier |
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| spelling | nottingham-412342020-05-04T19:52:58Z https://eprints.nottingham.ac.uk/41234/ Coupled discrete/continuum simulations of the impact of granular slugs with clamped beams: stand-off effects Goel, A. Uth, T. Liu, Tao Wadley, H.N.G. Deshpande, V.S. Coupled discrete particle/continuum simulations of the normal (zero obliquity) impact of granular slugs against the centre of deformable, end-clamped beams are reported. The simulations analyse the experiments of Uth et al. (2015) enabling a detailed interpretation of their observations of temporal evolution of granular slug and a strong stand-off distance dependence of the structural response. The high velocity granular slugs were generated by the pushing action of a piston and develop a spatial velocity gradient due to elastic energy stored during the loading phase by the piston. The velocity gradient within the “stretching” slug is a strong function of the inter-particle contact stiffness and the time the piston takes to ramp up to its final velocity. Other inter-particle contact properties such as damping and friction are shown to have negligible effect on the evolution of the granular slug. The velocity gradients result in a slug density that decreases with increasing stand-off distance, and therefore the pressure imposed by the slug on the beams is reduced with increasing stand-off. This results in the stand-off dependence of the beam's deflection observed by Uth et al. (2015). The coupled simulations capture both the permanent deflections of the beams and their dynamic deformation modes with a high degree of fidelity. These simulations shed new light on the stand-off effect observed during the loading of structures by shallow-buried explosions. Elsevier 2018-01 Article PeerReviewed Goel, A., Uth, T., Liu, Tao, Wadley, H.N.G. and Deshpande, V.S. (2018) Coupled discrete/continuum simulations of the impact of granular slugs with clamped beams: stand-off effects. Mechanics of Materials, 116 . pp. 90-103. ISSN 1872-7743 Granular material; Particle impact; Discrete particle simulation; Fluid-structure interaction; Landmine; Blast http://www.sciencedirect.com/science/article/pii/S0167663616301879 doi:10.1016/j.mechmat.2017.03.001 doi:10.1016/j.mechmat.2017.03.001 |
| spellingShingle | Granular material; Particle impact; Discrete particle simulation; Fluid-structure interaction; Landmine; Blast Goel, A. Uth, T. Liu, Tao Wadley, H.N.G. Deshpande, V.S. Coupled discrete/continuum simulations of the impact of granular slugs with clamped beams: stand-off effects |
| title | Coupled discrete/continuum simulations of the impact of granular slugs with clamped beams: stand-off effects |
| title_full | Coupled discrete/continuum simulations of the impact of granular slugs with clamped beams: stand-off effects |
| title_fullStr | Coupled discrete/continuum simulations of the impact of granular slugs with clamped beams: stand-off effects |
| title_full_unstemmed | Coupled discrete/continuum simulations of the impact of granular slugs with clamped beams: stand-off effects |
| title_short | Coupled discrete/continuum simulations of the impact of granular slugs with clamped beams: stand-off effects |
| title_sort | coupled discrete/continuum simulations of the impact of granular slugs with clamped beams: stand-off effects |
| topic | Granular material; Particle impact; Discrete particle simulation; Fluid-structure interaction; Landmine; Blast |
| url | https://eprints.nottingham.ac.uk/41234/ https://eprints.nottingham.ac.uk/41234/ https://eprints.nottingham.ac.uk/41234/ |