FINITE ELEMENT ANALYSIS OF CRATER FORMATION IN CLAY SOILS | ||||
| The International Conference on Civil and Architecture Engineering | ||||
| Article 11, Volume 7, 7th International Conference on Civil and Architecture Engineering, May 2008, Page 107-122 PDF (590.19 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/iccae.2008.45422 | ||||
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| Authors | ||||
| Nabil NAGY1; Mostafa MOHAMED2; Jess BOOT3 | ||||
| 1Lecturer in Geotechnical Engineering Civil Eng. Department, Military Technical Collage–Cairo, EGYPT. | ||||
| 2Lecturer in Geotechnical Engineering, School of Engineering, Design and Technology, University of Bradford, Bradford, UK. | ||||
| 3Reader in Structural Engineering, School of Engineering, Design and Technology, University of Bradford, Bradford, UK. | ||||
| Abstract | ||||
| Numerical studies of craters produced by explosions on or underneath the ground surface are scarce An ability to predict the anticipated size of crater is crucial to identify the corresponding damage that might be caused by a given explosive charge, or to assess the magnitude of the charge if this was not known. In this paper, a non-linear dynamic numerical analysis of the explosion phenomena in clay soils associated with different amounts of TNT explosive charge is performed using the ABAQUS/Explicit finite element code. To validate the numerical procedure and material constitutive models used in the present work, a comparison with relatively small scale experiments is first performed. The results obtained illustrate that an agreement between numerical and experimental results is reasonable. Further numerical investigations have been carried out for the crater dimensions created from bigger amounts of TNT charges. A study of the influence of soil density on the crater dimensions is then undertaken. Based on the obtained numerical results, a new prediction equation is proposed for the crater dimensions as a function of the explosive charge considered. This equation represents the approximation of the numerical results by least squares fitting. It was found that variation of soil density could cause a change of up to 4% in the crater diameter. However, it will be necessary to investigate variation of all the soil parameters before more generalized conclusions can be made. | ||||
| Keywords | ||||
| crater; surface blast; finite element analysis – soil-blast interaction | ||||
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