Modeling Aspects of High Velocity Impact of Particles in Cold Spraying by Explicit Finite Element Analysis

Li, Wenya; Zhang, Chao; Li, Chang-Jiu; Liao, Hanlin

doi:10.1007/s11666-009-9325-2

Cited by 98 publications

(60 citation statements)

References 13 publications

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“…In addition, considering the fast dynamics and large deformation during the particle/substrate impact, the control of excessive element distortions is required to ensure integration stability ( Ref 14,25,30). Particularly for this study, element distortion control is used with the distortion length ratio 0.1 for the large deformation, which is shown to give good description of the deformation and temperature evolution (see Supplementary Information for details).…”

Section: Materials Properties and Fea Controlling Parametersmentioning

confidence: 99%

“…The aforementioned control techniques, however, unavoidably impose artificial constraints, and thus presumably affect the physical behaviors of the material. While many efforts have been made to improve the simulation convergence ( Ref 14,25,31), no study yet explores the influence of deformation control techniques on the onset of shear instability.…”

Section: Introductionmentioning

confidence: 99%

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The Effects of Contact Conditions on the Onset of Shear Instability in Cold-Spray

et al. 2015

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Using ABAQUS/Explicit, the effects of contact conditions between the particle and substrate, including tangential friction, normal constraint, and contact geometry on the plastic deformation during the coldspray process are studied. It was found that the onset of shear instability, an event often used to indicate the establishment of bonding, is very sensitive to the choice of contact conditions. This suggests that the onset of shear instability does not serve as an accurate means to identify the plasticity threshold responsible for bonding. On the other hand, it is demonstrated that the evolution of the overall equivalent plastic strain (i.e., PEEQ) and the overall von Mises stress, being linearly proportional to each other, are both independent of contact conditions. Furthermore, it is shown that an energy value, defined as the product of the PEEQ and the von Mises stress integrated over all particle elements, can quantitatively represent the energy dissipated via plastic deformation while being independent of contact conditions. The PEEQ and associated energy value as defined may provide robust tools to assess the plasticity and the consequent bonding during cold-spray.

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Section: Materials Properties and Fea Controlling Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effects of Contact Conditions on the Onset of Shear Instability in Cold-Spray

et al. 2015

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“…Zdecydowano się również na zastosowanie algorytmu ALE adaptive mesh w celu zapobieżenia znacznej deformacji siatki. Okazało się jednak, że podobnie jak w przypadku metali [13,14], algorytm ten nie wpłynął na polepszenie jakości wyników. tablica I. Dane materiałowe zastosowane do symulacji [10,11] Ze względu na późniejszą weryfikację doświad-czalną badań numerycznych zdecydowano się przyjąć parametry nanoszenia możliwe do ustawienia na posiadanym urządzeniu Dymet 413.…”

Section: Materiały I Metodyka Badańunclassified

Analiza numeryczna mechanizmu wiązania proszku cyny z powierzchnią tworzywa sztucznego w procesie natryskiwania na zimno

Małachowska

Winnicki

Ambroziak

2015

Przegląd Spawalnictwa

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Analiza numeryczna mechanizmu wiązania proszku cyny z powierzchnią tworzywa sztucznego w procesie natryskiwania na zimno numerical simulation of tin powder spraying onto aBs substrate plastic in the cold spray method Mgr inż. aleksandra Małachowska, mgr inż. Marcin Winnicki, dr hab. inż. andrzej ambroziak, prof. PWr -Politechnika Wrocławska. StreszczenieW procesie nanoszenia powłok metodą Cold Spray cząsteczki są przyspieszane do dużych prędkości za pomocą rozgrzanego i sprężonego gazu, a po uderzeniu w podłoże osadzają się wskutek deformacji plastycznej. Ze względu na niską temperaturę występującą w tej metodzie wydaje się ona odpowiednia do metalizacji tworzyw sztucznych. W artykule zawarto analizę literaturową z zakresu metalizacji tworzyw sztucznych. Przedstawiono wyniki symulacji numerycznej mES nanoszenia proszku cyny na podłoże z tworzywa ABS. Analizie zostały poddane pola temperatury podczas procesu nanoszenia. Otrzymane wyniki zweryfikowano w oparciu o zdjęcia z mikroskopu skaningowego. abstractIn Cold Spray process particles are accelerated to high speed by heated and compressed gas, and after impact deposited on the substrate as a result of plastic deformation. Due to the low temperatures during the process the Cold Spray method seems to be appropriate to the metallization of plastics. The article includes analysis of the literature of plastics metallization. The results of numerical simulation of tin powder spraying onto ABS substrate plastic are presented. The temperature fields during the spraying process are analyzed. The obtained results are verified on the basis of scanning microscope images.Wstęp metoda natryskiwania na zimno (Cold Spray) wynaleziona w latach 80 ub.w. w Rosji należy do najnowszej generacji metod natryskiwania cieplnego. Istota jej działania opiera się na przyspieszeniu nanoszonego proszku w strumieniu sprężonego i podgrzanego gazu do prędkości naddźwiękowych przy zastosowaniu zbieżno-rozbieżnej dyszy de Lavala. W zależności od stosowanego ciśnienia gazu wyróżnia się dwie odmiany natryskiwania na zimno: nisko-i wysokociśnieniową.W przypadku metody niskociśnieniowej gazem roboczym jest najczęściej powietrze o ciśnieniu do 1 mPa, a nagrzewnica umieszczona jest w palniku. Proszek wprowadzany jest radialnie tuż za przewężeniem (rys. 1). Fig. 1. Scheme of Low Presure Cold Spray method [1] Rys. 1. Schemat metody niskociśnieniowego natryskiwania na zimno [1]

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“…Considering the extremely short impacting time scale, it is difficult to experimentally observe the whole deformation process of particles, only the formed coating can be observed through the experimental way. Therefore, the numerical method was always employed to study the particle deformation process as well as the bonding mechanism in cold spraying ( Ref 6,[12][13][14][15][16][17]. It has been reported that particle mechanical properties, particle size, incident velocity, and angle play an important role in the deformation behavior and coating formation ( .…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Effects of Interactions Between Particles on Coating Formation in Cold Spraying

Yin

Wang

et al. 2009

J Therm Spray Tech

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In this study, an investigation on the effects of interactions between copper particles on coating formation was conducted by using a finite element analysis method to clarify the bonding mechanism in cold spraying. The predicted results reveal that the interactions between particles significantly affect the particle deformation and thus coating formation. When the initial parallel distance between particles is short, particles compress with the generation of gap between them. For the vertical case, the initial distance between particles also has an important effect. Short vertical distance makes the subsequent incident particle deform so weakly that the bonding performance is probably not strong enough to form a coating. Furthermore, for successive impacting particles, the subsequent incident particles will tamp the former deposited particles, causing the coating to be little porous near the surface and denser inside the coating.

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Modeling Aspects of High Velocity Impact of Particles in Cold Spraying by Explicit Finite Element Analysis

Cited by 98 publications

References 13 publications

The Effects of Contact Conditions on the Onset of Shear Instability in Cold-Spray

The Effects of Contact Conditions on the Onset of Shear Instability in Cold-Spray

Analiza numeryczna mechanizmu wiązania proszku cyny z powierzchnią tworzywa sztucznego w procesie natryskiwania na zimno

Numerical Investigation on Effects of Interactions Between Particles on Coating Formation in Cold Spraying

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