Evaluation of Accuracy and Stability of the Classical SPH Method Under Uniaxial Compression

Das, Raj; Cleary, Paul W.

doi:10.1007/s10915-014-9948-4

Cited by 23 publications

(14 citation statements)

References 66 publications

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“…SPH modeling has been successfully applied to fluid flow problems in the past. More recently, there has been a growing interest in modeling solid deformation problems with SPH , even including applications in bone mechanics . Full details of the SPH method can be found in .…”

Section: Materials and Methodologymentioning

confidence: 99%

Evaluating Simulant Materials for Understanding Cranial Backspatter from a Ballistic Projectile

Das

Collins

Verma

et al. 2015

Journal of Forensic Sciences

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In cranial wounds resulting from a gunshot, the study of backspatter patterns can provide information about the actual incidents by linking material to surrounding objects. This study investigates the physics of backspatter from a high-speed projectile impact and evaluates a range of simulant materials using impact tests. Next, we evaluate a mesh-free method called smoothed particle hydrodynamics (SPH) to model the splashing mechanism during backspatter. The study has shown that a projectile impact causes fragmentation at the impact site, while transferring momentum to fragmented particles. The particles travel along the path of least resistance, leading to partial material movement in the reverse direction of the projectile motion causing backspatter. Medium-density fiberboard is a better simulant for a human skull than polycarbonate, and lorica leather is a better simulant for a human skin than natural rubber. SPH is an effective numerical method for modeling the high-speed impact fracture and fragmentations.

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Section: Materials and Methodologymentioning

confidence: 99%

Evaluating Simulant Materials for Understanding Cranial Backspatter from a Ballistic Projectile

Das

Collins

Verma

et al. 2015

Journal of Forensic Sciences

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“…Both corrections are used in this paper. Das and Cleary give a more detailed analysis of the impact of the variation of these parameters on the quality of results in SPH [39].…”

Section: Additional Corrective Termsmentioning

confidence: 99%

“…13a. For a more detailed analysis of the impact of the number of particles on the quality of results in SPH, the authors recommend the reading of Das and Cleary [39]. Fig.…”

Section: Tensile Wing Crack Initiationmentioning

confidence: 99%

Mixed-mode fracture modeling with smoothed particle hydrodynamics

Douillet-Grellier

Jones

Pramanik

et al. 2016

Computers and Geotechnics

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“…It has been shown to be robust [9,18,24] and it does not affect computational efficiency, unlike some of the alternative methods. The impact of this correction on the accuracy and stability of the classical SPH method for elastic deformation has recently been evaluated by [15]. The artificial viscosity Π ab in Eq.…”

Section: Tensile Instability Correctionmentioning

confidence: 99%

Modelling highly deformable metal extrusion using SPH

Prakash

Cleary

2015

Comp. Part. Mech.

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Computational modelling is often used to reduce trial extrusions through accurate defect prediction. Traditionally, metal extrusion is modelled using mesh based finite element methods. However, large plastic deformations can lead to heavy re-meshing and numerical diffusion. Here we use the mesh-less smoothed particle hydrodynamics method since it allows simulation of large deformations without re-meshing and the tracking of history dependent properties such as plastic strain making it suitable for defect prediction. The variation in plastic strain and deformation for aluminium alloy in a cylindrical 3D geometry with extrusion ratio and die angle is evaluated. The extrusion process is found to have three distinct phases consisting of an initial sharp rise in extrusion force, a steady phase requiring constant force and terminating in a sharp decline in force as metal is completely extruded. Deformation and plastic strain increased significantly with extrusion ratio but only moderately with die angle. Extrusion force increased by 150 % as the extrusion ratio increased from 2:1 to 4:1 but had only a marginal change with die angle. A low strain zone in the centre of the extruded product was found to be a function of extrusion ratio but was persistent and did not vary with die angle. Simulation of a complex 3D building industry component showed large variations in plastic strain along the length of the product at two scales. These were due to change in metal behaviour as extrusion progressed from phase 1 to phase 2. A stagnation zone at the back of the die was predicted that could lead to the "funnel" or "pipe" defect.

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Evaluation of Accuracy and Stability of the Classical SPH Method Under Uniaxial Compression

Cited by 23 publications

References 66 publications

Evaluating Simulant Materials for Understanding Cranial Backspatter from a Ballistic Projectile

Evaluating Simulant Materials for Understanding Cranial Backspatter from a Ballistic Projectile

Mixed-mode fracture modeling with smoothed particle hydrodynamics

Modelling highly deformable metal extrusion using SPH

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