Modelling of ploughing in a single-asperity sliding contact using material point method

Mishra, Tanmaya; Ganzenmüller, Georg; Rooij, M.B. de; Shisode, Meghshyam; Hazrati, Javad; Schipper, Dirk J.

doi:10.1016/j.wear.2018.11.020

Cited by 24 publications

(17 citation statements)

References 30 publications

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“…On the other hand, TLSPH, which is more suitable for solid material simulations, such as for fracture and machining, has been attracting more research interest, but only in recent years [25,26]. For example, a series of studies on the scratching process by a spherical indenter has been conducted [27][28][29][30][31]. Surface topology and scratching forces under various load conditions have been compared.…”

Section: Introductionmentioning

confidence: 99%

Numerical study via total Lagrangian smoothed particle hydrodynamics on chip formation in micro cutting

Wang

Zhang

2020

Adv. Manuf.

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Numerical simulation is an effective approach in studying cutting mechanism. The widely used methods for cutting simulation include finite element analysis and molecular dynamics. However, there exist some intrinsic shortcomings when using a mesh-based formulation, and the capable scale of molecular dynamics is extremely small. In contrast, smoothed particle hydrodynamics (SPH) is a candidate to combine the advantages of them. It is a particle method which is suitable for simulating the large deformation process, and is formulated based on continuum mechanics so that large scale problems can be handled in principle. As a result, SPH has also become a main way for the cutting simulation. Since some issues arise while using conventional SPH to handle solid materials, the total Lagrangian smoothed particle hydrodynamics (TLSPH) is developed. But instabilities would still occur during the cutting, which is a critical issue to resolve. This paper studies the effects of TLSPH settings and cutting model parameters on the numerical instability, as well as the chip formation process. Plastic deformation, stress field and cutting forces are analyzed as well. It shows that the hourglass coefficient, critical pairwise deformation and time step are three important parameters to control the stability of the simulation, and a strategy on how to adjust them is provided.

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Section: Introductionmentioning

confidence: 99%

Numerical study via total Lagrangian smoothed particle hydrodynamics on chip formation in micro cutting

Wang

Zhang

2020

Adv. Manuf.

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“…An empirical formula for contact stiffness was obtained, and the finite-element microcontact stiffness model (KE model) was established in 2003. Subsequently, much research work has been accomplished [11,12,13], revising and extending the already existing contact model. However, in the process of modifying the already existing model, the above authors focused on the analysis of the mechanical contact calculation and of the extended elastic–plastic deformation process for asperities under contact load.…”

Section: Introductionmentioning

confidence: 99%

A Novel Micro-Contact Stiffness Model for the Grinding Surfaces of Steel Materials Based on Cosine Curve-Shaped Asperities

Suo

Lin

et al. 2019

Materials

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Contact stiffness is an important parameter for describing the contact behavior of rough surfaces. In this study, to more accurately describe the contact stiffness between grinding surfaces of steel materials, a novel microcontact stiffness model is proposed. In this model, the novel cosine curve-shaped asperity and the conventional Gauss distribution are used to develop a simulated rough surface. Based on this simulated rough surface, the analytical expression of the microcontact stiffness model is obtained using contact mechanics theory and statistical theory. Finally, an experimental study of the contact stiffness of rough surfaces was conducted on different steel materials of various levels of roughness. The comparison results reveal that the prediction results of the present model show the same trend as that of the experimental results; the contact stiffness increases with increasing contact pressure. Under the same contact pressure, the present model is closer to the experimental results than the already existing elastic–plastic contact (CEB) and finite-element microcontact stiffness (KE) models, whose hypothesis of a single asperity is hemispherical. In addition, under the same contact pressure, the contact stiffness of the same steel material decreases with increasing roughness, whereas the contact stiffness values of different steel materials under the same roughness show only small differences. The correctness and accuracy of the present model can be demonstrated by analyzing the measured asperity geometry of steel materials and experimental results.

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“…The material point method (MPM) has been implemented to numerically model the scratch process in three dimensions. MPM, which combines both a background mesh and meshless concepts, can handle problems involving arbitrarily large deformations and material detachment such as abrasive wear and machining [120][121][122]. The scratches were simulated using a hemispherical rigid indenter (representing the roll asperity) sliding on a deforming substrate (representing the strip).…”

Section: Materials Point Methods (Mpm) Scratch Simulationsmentioning

confidence: 99%

Wear particles formation in cold rolling

Mekicha

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Modelling of ploughing in a single-asperity sliding contact using material point method

Cited by 24 publications

References 30 publications

Numerical study via total Lagrangian smoothed particle hydrodynamics on chip formation in micro cutting

Numerical study via total Lagrangian smoothed particle hydrodynamics on chip formation in micro cutting

A Novel Micro-Contact Stiffness Model for the Grinding Surfaces of Steel Materials Based on Cosine Curve-Shaped Asperities

Wear particles formation in cold rolling

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