simulation of explosion by a coupled fe/de gas-solid interaction model
نویسندگان
چکیده
explosion has always been regarded as one of the most complicated engineering problems. as a result, many engineers have preferred rather simplified empirical approaches in comparison to extremely complex deterministic analyses. in this paper, however, a numerical simulation based on the combined finite/discrete element methodology is presented for analyzing the dynamic behavior of fracturing rock masses in blasting. a finite element discretization of discrete elements allows for complex shapes of fully deformable discrete elements with geometric and material nonlinearities to be considered. only a rankine strain softening plasticity model is employed, which is suitable for rock and other brittle materials. creation of new lines/edges/bodies from fracturing and fragmentation of original objects is systematically considered in the proposed gas-solid interaction flow model. an equation of state is adopted to inexpensively calculate the pressure of the detonation gas in closed form. the model employed for the flow of detonation gas has resulted in a logical algorithmic procedure for the evaluation of spatial distribution of the pressure of detonation gas, work done by the expanding gas and the total mass of the detonation gas as functions of time indicating the ability of model to respond to changes in both the mass of explosive charge and the size of the solid block undergoing fracture. rock blasting and demolition problems are amongst the engineering applications that are expected to benefit directly from the present development. the results of this study may also be used to provide some numerical based reliable solutions for the complex analysis of structures subjected to explosive loadings.
منابع مشابه
A Numerical Simulation Model of Solid Acid Fuel Cell Performance by CsH2PO4 Electrolyte
The performance of the solid acid fuel cell by CsH2PO4 electrolyte was analyzed using the present model of the electrochemical reaction and transport phenomena, which are fully coupled with the governing equations. Development of such a model requires creating the three-dimensional geometry and its mesh grid, discretization of momentum, mass and electric charge balance equation and solving the ...
متن کاملEstimation of landfill gas generation in a municipal solid waste disposal site by LandGEM mathematical model
Anaerobic decomposition of organic compounds in landfills is responsible for generation of greenhouse gases. The present study aimed to determine the total gas and methane emission from a landfill located in Hamedan (west of Iran) from 2011 to 2030. LandGEM 3.02 model was used to estimate the gas emission with the volumetric methane percent of 60%, production potential of 107, and methane gener...
متن کاملa study on insurer solvency by panel data model: the case of iranian insurance market
the aim of this thesis is an approach for assessing insurer’s solvency for iranian insurance companies. we use of economic data with both time series and cross-sectional variation, thus by using the panel data model will survey the insurer solvency.
Gas-Solid Interaction
The heats of adsorption on weakly activated ^-aluminium oxide for a number of linear alkanes (from n-butane to n-nonane) and for 2.2.4-trimethylpentane have been determined by GSC and extrapolated to zero surface coverage. The dependance of the adsorption energy on the number of carbon atoms is discussed on the basis of the bidimensional gas model: it is shown that the interactions of the adsor...
متن کاملA COUPLED CROP AND SOLID SET SPRINKLER SIMULATION MODEL: II. MODEL APPLICATION by F. Dechmi
In this work, applications of the coupled solid set sprinkler irrigation and crop model AdorSim introduced in the companion paper are presented. The sprinkler irrigation model is based on ballistic theory, while the crop model is based on CropWat. AdorSim was used to evaluate the effect of sprinkler spacing on seasonal irrigation water use (WU) and crop yield. The most relevant results were rel...
متن کاملGas-Solid Interaction
In physical adsorption the interaction of adsorbed molecules with solids is mainly due to induction forces acting between the surface electric field and permanent or induced dipoles in the adsorbate, and to L O N D O N dispersion forces, these prevailing, for example, in adsorption of apolar molecules In the last years it has been shown that the dielectric behaviour of the heterogeneous adsorbe...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
international journal of civil engineeringجلد ۴، شماره ۴، صفحات ۳۱۴-۳۲۹
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023