Computer-simulations based development of a high strain-rate, large-deformation, high-pressure material model for STANAG 4569 sandy gravel

Grujičić, M.; Pandurangan, B.; Coutris, N.; Cheeseman, B. A.; Roy, Walter; Skaggs, R. R.

doi:10.1016/j.soildyn.2007.11.008

Cited by 30 publications

(27 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Randers-Pehrson and Bannister (1997) implemented the air blast section of CONWEP into DYNA2D & DYNA3D. *LOAD_BLAST keyword activates CONWEP model in LS-DYNA [3][4]. This method is based on applying a previously known function of loading (Pressure segments) to the structure.…”

Section: Defining Of Simulation Methodologymentioning

confidence: 99%

“…Field test is conducted with two ways depend on mine position. The mine can be either buried in soil or put into steel pot in accordance with NATO STANAG 4569 [3]. In order to reduce uncertainty during validation period of numerical simulations, in this study mine was planted into a steel pot.…”

Section: Defining Of Simulation Methodologymentioning

confidence: 99%

“…The three readings are used to determine the time dependent stress state of the specimen. From the time dependent strain data, a stress vs. strain plot can be obtained [3][4][5][6][7][8][9][10]. Specimens with the span of 10mm.…”

Section: Dynamic Split-hopkinson Pressure Bar Testsmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Approach to Design Process of Armored Vehicles

Erdik¹,

Kılıç²,

Güden

et al. 2010

ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, Volume 4

View full text Add to dashboard Cite

Today, it is imperative that armored vehicles need advanced protection kits against anti-symmetric threats more than before. The primary goal of this study was to assess benefits of explicit hydrocodes for mine protection resistance of armored vehicles. An analysis of an armored vehicle under blast loading caused by high explosive (HE) detonation is presented with comparison to a full-scale test. The problem was examined using LS-DYNA which is an explicit non-linear finite element code. Multi Material Arbitrary Lagrangian Eulerian (MM-ALE) Fluid Structure Interaction Method was selected to model the explosion domain so as to observe advancing of the shock wave in the compressed air and to investigate the effects of blast on the vehicle structure after explosion. Johnson-Cook constitutive material model, JonesWilkins-Lee (JWL) and Linear Polynomial equation of states were used for the problem. Results show that numerical analysis was in good agreement with the experimental result. INTRODUCTIONIn modern world, asymmetric threats severely affect military vehicles and their occupants. Numerical simulations can be useful to estimate blast damage on vehicle body and to improve durability of vehicles against mine blast attacks.The assessment of blast loading and damage on structures and equipment is crucial in a wide range of military applications. During design process of military vehicle, prototypes are built and used in destructive field-tests in order to determine the level of blast resistance of the vehicle. The field test is not only time consuming, but also costly and it might not ensure an optimized design. In addition, a variety of field conditions and other related factors make each blast test difficult to perform.Simulation capability is important to accurately interpret the blast loading and structural response. Recent advances in commercially available finite element codes have made

show abstract

Section: Defining Of Simulation Methodologymentioning

confidence: 99%

Section: Defining Of Simulation Methodologymentioning

confidence: 99%

See 1 more Smart Citation

Numerical Approach to Design Process of Armored Vehicles

Erdik¹,

Kılıç²,

Güden

et al. 2010

ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, Volume 4

View full text Add to dashboard Cite

show abstract

“…The influence of the humidity of this soil is large. Investigations for STANAG 4569 sandy gravel are done by Grujicic [5], [6]. Partial formulas are given.…”

Section: Introductionmentioning

confidence: 99%

Development of EOS data for granular material like sand by using micromodels

Larcher

Gebbeken

2012

EPJ Web of Conferences

View full text Add to dashboard Cite

Abstract. Detonations in soil can occur due to several reasons: e.g. land mines or bombs from the Second World War. Soil is also often used as a protective barrier. In all cases the behaviour of soil loaded by shock waves is important. The simulation of shock wave loaded soil using hydro-codes like AUTODYN needs a failure model as well as an equation of state (EOS). The parameters for these models are often not known. The popular material law for sand from Laine and Sandvik [1], e.g., is a first approximation, but it can only be used for dry sand with a certain grain grading. The parameters porosity, grain grading, and humidity have a big influence on the material behaviour of cohesive soils. Micro-mechanic models can be used to develop the material behaviour of granular materials. EOS data can be obtained by numerically loading micro-mechanically modelled grains and measuring the density under a certain pressure in the finite element model. The influence of porosity, grain grading, and humidity can be easily investigated. EOS data are determined in this work for cohesive soils depending on these parameters.

show abstract

“…To overcome these short-comings, Clemson University and the Army Research Laboratory (ARL), Aberdeen, Proving Ground, MD jointly developed and subsequently parameterized [using the results of a detailed investigation of dynamic response of soil at different saturation levels, as carried out by researchers at the Cavendish Laboratory, Cambridge, UK (Ref 8,9)] a new so-called ''CU-ARL'' soil model (Ref [10][11][12][13]. This model is capable of capturing the effects of: (a) soil average particle size and particle size distribution; (b) the initial level of compaction/ density; (c) clay, silt, and gravel contents; and (d) degree of soil saturation with water.…”

Section: Introductionmentioning

confidence: 99%

Comparative Discrete-Particle Versus Continuum-Based Computational Investigation of Soil Response to Impulse Loading

Grujičić

Pandurangan

Hariharan

2011

J. of Materi Eng and Perform

Self Cite

View full text Add to dashboard Cite

Two representative soil models are compared and contrasted within two transient nonlinear dynamics computational analyses. The first soil model is representative of a discrete-particle group of models, while the other is a typical continuum-type consolidated-soil model. The two computational analyses involved: (a) the case of a soil slug impacting a rigid flat surface and (b) the case of detonation of a mine shallow buried in soil and the interaction of the resulting gaseous detonation products, mine fragments, and soil ejecta with a plate-like deformable steel target. The results obtained show that the use of the computationally more expensive particle mechanics-based soil models is fully justified only in the case of loose (low-density) soil. In addition, the magnitude of the particle-to-particle coefficient of restitution has been found to have a secondorder effect on the extent of momentum transferred from the moving soil to the target and that it may be substantially different from its effective counterpart for the entire loose-soil agglomerate.

show abstract

Computer-simulations based development of a high strain-rate, large-deformation, high-pressure material model for STANAG 4569 sandy gravel

Cited by 30 publications

References 15 publications

Numerical Approach to Design Process of Armored Vehicles

Numerical Approach to Design Process of Armored Vehicles

Development of EOS data for granular material like sand by using micromodels

Comparative Discrete-Particle Versus Continuum-Based Computational Investigation of Soil Response to Impulse Loading

Contact Info

Product

Resources

About