Surface and Buried Explosions: An Explorative Review with Recent Advances
Archives of Computational Methods in Engineering, 2021
Partially or fully buried explosive on detonation releases a large amount of kinetic energy a par... more Partially or fully buried explosive on detonation releases a large amount of kinetic energy a part of which gets dissipated during creation of crater and the rest gets converted into ground shock. Both phenomena are of complex nature with involvement of non-linearity in both loading and material characteristics. This review aims at providing an insight into mechanisms involved during an event of buried explosion with varying degree of confinement. Factors affecting crater formation and ground shock propagation in media are discussed in detail. An overview of various prediction methods developed over the years based on dimensional analysis and theory of similarity to estimate crater dimensions and magnitude of ground shock and ground motion along with their limitations is presented. Prediction models used to define and optimise rock fragmentation distribution in surface mining operations are additionally reviewed and discussed. Various state-of-the-art experimental and numerical techniques are discussed in brief. Finally, it discusses the challenges involved in both experimental and numerical analysis and thereby provides alternative solutions and suggestions for further investigations in specific areas of lacuna.
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Numerical investigation on the blast resistance of a door panel
Materials Today: Proceedings, 2020
Abstract Blast doors are specially designed doors for military facilities and important civil bui... more Abstract Blast doors are specially designed doors for military facilities and important civil buildings in potentially explosive environment. In the present investigation, Finite Element (FE) analysis is carried out to understand the dynamic response of blast door under a given blast loading using ABAQUS/Explicit®. Five different doors configurations with two different materials i.e. AISI 1045 steel and structural steel (ST37) are investigated. Further, effect of consideration of strain rate, on dynamic response of the doors, is investigated using rate dependent Johnson-Cook model. Blast load is applied using ConWep function to understand the dynamic response of blast door in terms of displacement at different locations along with their failure patterns. Based on this investigation, it is observed that central point displacement is significantly influenced by the geometry of door with all other parameters being same. Further, considerations of strain rate show no major effect on the peak displacement for both the materials considered in the present investigation.
Numerical Modeling of Shallow Buried Tunnel Subject to Surface Blast Loading
Journal of Performance of Constructed Facilities, 2020
AbstractDynamic response of shallow buried tunnel with three different cross sections subjected t... more AbstractDynamic response of shallow buried tunnel with three different cross sections subjected to surface blast loading using LS-DYNA version R10.1.0 is investigated. Multimaterial arbitrary Lagra...
Este é um artigo de acesso aberto distribuído sob os termos da Licença Creative Commons Attributi... more Este é um artigo de acesso aberto distribuído sob os termos da Licença Creative Commons Attribution-NonCommercial-NoDerivs 3.0 IGO, que permite o uso, distribuição e reprodução em qualquer meio, desde que o trabalho original seja devidamente citado. Não são permitidas modificações ou uso comercial dos artigos. Em qualquer reprodução do artigo, não deve haver nenhuma sugestão de que a OPAS ou o artigo avaliem qualquer organização ou produtos específicos. Não é permitido o uso do logotipo da OPAS. Este aviso deve ser preservado juntamente com o URL original do artigo.
International Journal of Engineering Research and, 2017
In India, majority of coal demand is met by opencast mining production. The continuously increasi... more In India, majority of coal demand is met by opencast mining production. The continuously increasing demand of coal has led to rapid opencast mining activities with high stripping ratio of 1:12 to 1:15, in turn requiring large quantities of overburden to be mined and its storage poses serious problem. Recently, few dump failures have taken place. Destabilisation of overburden dump hampers the production of the mine. On the other hand, under utilisation of storage capacity of the dump gives rise to additional land requirement. Therefore, for efficient functioning of dump, it is important to optimally utilise its capacity commensurate with stability. In this study, an internal dump at one of the mines of Coal India Limited has been studied. Two different techniques have been used to simulate and analyse the existing dump for its storage capacity and safety. The dump has been optimised maintaining the stability and safety requirements of the slope, and has been studied for its stability using different methods. A comparison of its factor of safety obtained from each method of analysis has been presented. From the study, an increase in the dump capacity of about 14% has been proposed by the numerical modelling technique, which further encourages possible savings in land. Hence, the paper seeks to optimise the existing dump and provide an economical and safe solution to the issues of land acquirement in India for overburden storage.
International Journal of Engineering Research and, 2017
AbstractSlope failure has become a common phenomenon around the world, often taking a heavy toll... more AbstractSlope failure has become a common phenomenon around the world, often taking a heavy toll on human lives. Both, natural and man-made slopes created, are susceptible to failure unless sufficient stability is not imparted. Knowledge of all the factors causing failure is an important aspect to understand the mechanical behavior of slope material. The shear strength parameters, cohesion, and angle of internal friction of failed material, determined from laboratory and in-situ tests may be misleading. Back analysis is a much reliable and consistent method to estimate the mobilized parameters in-situ. This paper explores the application of traditional limit equilibrium method (LEM) and Finite Element Method (FEM) to perform back analysis and find out the probability of failure of slopes. It performs probabilistic analysis on a case of failed slope using both the methods. This paper shall discuss certain indispensable drawbacks of limit equilibrium method and how Finite Element method can help to overcome those limitations.
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