A discrete particle approach to simulate the combined effect of blast and sand impact loading of steel plates

被引:92
作者
Borvik, T. [1 ,2 ,3 ]
Olovsson, L. [4 ]
Hanssen, A. G. [1 ,2 ,4 ]
Dharmasena, K. P. [5 ]
Hansson, H. [6 ]
Wadley, H. N. G. [5 ]
机构
[1] Norwegian Univ Sci & Technol, Ctr Res Based Innovat CRI, Struct Impact Lab SIMLab, NO-7491 Trondheim, Norway
[2] Norwegian Univ Sci & Technol, Dept Struct Engn, NO-7491 Trondheim, Norway
[3] Norwegian Def Estates Agcy, Dept Res & Dev, NO-0103 Oslo, Norway
[4] IMPETUS Afea AB, SE-14160 Huddinge, Sweden
[5] Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA
[6] KTH Royal Inst Technol, Div Concrete Struct, SE-10044 Stockholm, Sweden
关键词
Blast loads; Experimental tests; Sand ejecta; Discrete particles; Numerical simulations; MATERIAL MODEL; STRAIN RATES; TEMPERATURES; SATURATION; RANGE;
D O I
10.1016/j.jmps.2011.03.004
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The structural response of a stainless steel plate subjected to the combined blast and sand impact loading from a buried charge has been investigated using a fully coupled approach in which a discrete particle method is used to determine the load due to the high explosive detonation products, the air shock and the sand, and a finite element method predicts the plate deflection. The discrete particle method is based on rigid, spherical particles that transfer forces between each other during collisions. This method, which is based on a Lagrangian formulation, has several advantages over coupled Lagrangian-Eulerian approaches as both advection errors and severe contact problems are avoided. The method has been validated against experimental tests where spherical 150 g C-4 charges were detonated at various stand-off distances from square, edge-clamped 3.4 mm thick AL-6XN stainless steel plates. The experiments were carried out for a bare charge, a charge enclosed in dry sand and a charge enclosed in fully saturated wet sand. The particle-based method is able to describe the physical interactions between the explosive reaction products and soil particles leading to a realistic prediction of the sand ejecta speed and momentum. Good quantitative agreement between the experimental and predicted deformation response of the plates is also obtained. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:940 / 958
页数:19
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