A particle-based approach to close-range blast loading

Olovsson, Lars; Hanssen, A.G.; Børvik, Tore; Langseth, Magnus

doi:10.1016/j.euromechsol.2009.06.003

Cited by 46 publications

(63 citation statements)

References 5 publications

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“…A discrete particle-based approach [25] [35] has been developed to model the interaction effects between various media and structural parts. To represent the soil, the method applies discrete, rigid, spherical particles that transfer forces between each other through contact and elastic collisions, while structural parts are represented by finite elements (see Figure 10 a)).…”

Section: A Particle-based Methods To Model Bullet Penetration In Sandmentioning

confidence: 99%

“…This was done to study the behaviour of granular materials during bullet impact, and at the same time establish an experimental database for validation of numerical methods. Secondly, a discrete particle-based approach [35] was used to model sand and its interaction with the bullet during penetration. The method has been implemented in the non-linear finite element code IMPETUS Afea Solver [36].…”

Section: Introductionmentioning

confidence: 99%

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Penetration of granular materials by small-arms bullets

Dey¹,

Olovsson

2015

International Journal of Impact Engineering

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This paper presents an experimental and numerical study on the penetration of granular materials by small-arms bullets. In the experimental tests, five different types of granular material (0-2 mm wet sand, 0-2 mm dry sand, 2-8 mm gravel, 8-16 mm crushed stone and 16-22 mm crushed rock) were impacted by four different types of smallarms bullets (7.62 mm Ball with a soft lead core, 7.62 mm AP with a hard steel core, 12.7 mm Ball with a soft steel core and 12.7 mm AP with a tungsten carbide core). The tests were carried out using different rifles to fire the projectiles, while the granular materials were randomly packed in a 320 mm diameter specially-designed steel tube. In all tests, the initial projectile velocity and the depth of penetration in the granular material were measured for each bullet type. In the numerical simulations, a discrete particle-based approach was used to model the behaviour of sand during bullet impact. The method works with discrete particles that transfer forces between each other through contact and elastic collisions, allowing for a simple and robust treatment of the interaction between the sand particles and the bullet which is represented by finite elements. An important observation from the study is that the penetration depth in dry sand is strongly influenced by deviation of the bullet from its original trajectory.Good agreement between the available experimental results and the numerical predictions is also in general obtained.

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Section: A Particle-based Methods To Model Bullet Penetration In Sandmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Penetration of granular materials by small-arms bullets

Dey¹,

Olovsson

2015

International Journal of Impact Engineering

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“…Deshpande et al [30] presented an paper describing the constitutive DPM model, its development and validation. Olovsson et al [62] described the corpuscular approach to modelling blast loading with discrete particles. Børvik et al [63] followed on from the work of Olovsson et al [62] by using the method to model the combined effect of blast and sand impact loading of steel plates.…”

Section: Discrete Particle Modelling Overviewmentioning

confidence: 99%

The response of quadrangular plates to buried charges

Pickering

Yuen

Nurick

et al. 2012

International Journal of Impact Engineering

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“…1, this classic approach is very complex and leads to energy conservation problems. We developed a purely Lagrangian Meshless Method applied to modeling the complete Blast Event [16]. The implementation of the Blast Particle Method (BPM) in the IMPETUS Afea Solver R is described in detail in [17] and compared with experimental results in [17,18].…”

Section: Blast Particle Methodsmentioning

confidence: 99%

“…4.1). The High explosive is modelled using the innovative Discrete Particle Method (DPM) [16]. Coupling between DPM and FEM is based on contact algorithm that transfers particles impulses to the structure.…”

Section: Numerical Modelmentioning

confidence: 99%

Modeling fragmentation with new high order finite element technology and node splitting

Olovsson

Limido²,

Lacome³

et al. 2015

EPJ Web of Conferences

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Abstract. The modeling of fragmentation has historically been linked to the weapons industry where the main goal is to optimize a bomb or to design effective blast shields. Numerical modeling of fragmentation from dynamic loading has traditionally been modeled by legacy finite element solvers that rely on element erosion to model material failure. However this method results in the removal of too much material. This is not realistic as retaining the mass of the structure is critical to modeling the event correctly. We propose a new approach implemented in the IMPETUS AFEA SOLVER R based on the following: New High Order Finite Elements that can easily deal with very large deformations; Stochastic distribution of initial damage that allows for a non homogeneous distribution of fragments; and a Node Splitting Algorithm that allows for material fracture without element erosion that is mesh independent. The approach is evaluated for various materials and scenarios: -Titanium ring electromagnetic compression; Hard steel Taylor bar impact, Fused silica Taylor bar impact, Steel cylinder explosion, The results obtained from the simulations are representative of the failure mechanisms observed experimentally. The main benefit of this approach is good energy conservation (no loss of mass) and numerical robustness even in complex situations.

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A particle-based approach to close-range blast loading

Cited by 46 publications

References 5 publications

Penetration of granular materials by small-arms bullets

Penetration of granular materials by small-arms bullets

The response of quadrangular plates to buried charges

Modeling fragmentation with new high order finite element technology and node splitting

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