Academic Journal
Effect of structurally-induced lateral confinement on split Hopkinson pressure bar test specimens of concrete-like materials
| العنوان: | Effect of structurally-induced lateral confinement on split Hopkinson pressure bar test specimens of concrete-like materials |
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| المؤلفون: | Flores-Johnson E.A., Li Q.M. |
| المصدر: | EPJ Web of Conferences, Vol 94, p 04031 (2015) |
| بيانات النشر: | EDP Sciences |
| سنة النشر: | 2015 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | Physics, QC1-999 |
| الوصف: | In dynamic testing of concrete-like materials, there is a need in distinguishing structural effects from genuine strain-rate effects. In this paper, this generic problem is studied by numerical simulations based on a phenomenological material model available in the commercial finite element (FE) code Abaqus. The numerical results show that the increase of the dynamic increase factor (DIF) with the increase of strain-rate in concrete-like materials in a Split Hopkinson Pressure Bar (SHPB) test is a phenomenon related not only to material strain-rate effects but also to structural effects. It was found that dilation, surface friction and lateral inertia cause lateral confinement, which enhances DIF when the strain-rate is greater than a transition strain-rate in the order of 102 s−1. Although, genuine strain-rate effect may exist as suggested by meso-scale simulations in previous investigations, the findings in this study show that structural effects have a significant contribution to the increase of DIF, and therefore, it is necessary to correctly calibrate existing phenomenological models and interpret the results obtained from split Hopkinson pressure bar (SHPB) tests. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 2100-014X |
| Relation: | http://dx.doi.org/10.1051/epjconf/20159404031; https://doaj.org/toc/2100-014X; https://doaj.org/article/a098fc5c297d457daf22ab1d1884e89c |
| DOI: | 10.1051/epjconf/20159404031 |
| الاتاحة: | https://doi.org/10.1051/epjconf/20159404031 https://doaj.org/article/a098fc5c297d457daf22ab1d1884e89c |
| رقم الانضمام: | edsbas.2BF80C52 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 2100014X |
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| DOI: | 10.1051/epjconf/20159404031 |