Finite element modeling of coating formation and transient heat transfer in the electric arc spray process

Chen, Yongxiong; Liang, Xiubing; Liu, Yan; Bai, Jinyuan; Xu, Bin

doi:10.1016/j.ijheatmasstransfer.2009.12.055

Cited by 30 publications

(5 citation statements)

References 28 publications

(28 reference statements)

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“…The roughness parameters were taken from surface measurements obtained using an atomic force microscope. And Chen et al (2010) used the birth and death features in ANSYS to create layer‐by‐layer probabilistic surface roughness in a 2D FE model to simulate an electric arc spray process.…”

Section: Fe Analysis Of Probabilistic Surfaces In Engineeringmentioning

confidence: 99%

Considerations for the incorporation of measured surfaces in finite element models

Thompson

Thompson²

2010

Scanning

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Summary: This work discusses some of the benefits, techniques, challenges, and considerations associated with the incorporation of measured surfaces in finite element (FE) models including how much surface data to measure and import into the model, the shape of the surface geometry to create, the presence and effect of surface layers and impurities, the required mesh density for rough surfaces, the nature of the element formulations and material properties at small length scales, the differences between measurement and FE coordinate systems, the limitations and idealizations of the FE method, issues associated with boundary conditions and their ability to impose or prevent conformal contact, and issues associated with the size of the pinball region and the contact stiffness relative to the nature of the surface. It also describes some current and future research directions that can be used to validate and expand existing techniques and to improve our understanding of surface phenomena. SCAN-NING 31: 1-16,

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Section: Fe Analysis Of Probabilistic Surfaces In Engineeringmentioning

confidence: 99%

Considerations for the incorporation of measured surfaces in finite element models

Thompson

Thompson²

2010

Scanning

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“…The aforementioned model was capable of predicting the transient surface temperature profile of the substrate. On the other hand, a few numerical and analytical studies have modelled the gas-substrate heat exchange by applying an analytically-estimated external average heat flux, or by using average heat transfer coefficient to evaluate the heat flux [7]. In this regard, a challenging issue may arise as to whether or not employing average heat transfer coefficient in the mathematical modelling considerably influences on the determination of the surface temperature profile of the target substrate.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Coefficient of an Under-Expanding Cold Spray Air Jet on a Flat Substrate

Mahdavi¹,

McDonald²

2018

Proceedings of the 5th International Conference of Fluid Flow, Heat and Mass Transfer (FFHMT'18)

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-A two-dimensional heat conduction model was developed to determine the transient temperature distribution within a flat substrate that was exposed to the impingement of a cold spray hot air jet during the deposition process. The credibility of employing average heat transfer coefficient in mathematical modelling and prediction of the surface temperature profile of a substrate was studied. Moreover, the condition under which the effect of the presence of the in-flight particles on the heat transfer coefficient of the underexpanding air jet can be neglected was investigated. In this regard, a cold spray unit was used to generate a supersonic air jet. A twodimensional heat conduction model was developed and solved by using Green's functions to determine the temperature distribution within the substrate. By applying a surface integral to the analytically-estimated spatially-varying heat transfer coefficient of an underexpanding cold spray air jet, the average heat transfer coefficient was determined. Both the average and spatially-varying heat transfer coefficients were used separately in the model to predict the transient surface temperature profile of the substrate. It was shown that when the Stokes number of the particles is sufficiently small, the effect of the presence of the particles on the heat transfer coefficient of the impinging dilute air-particle jet can be neglected. It was further found that the surface temperature that was predicted by using the average heat transfer coefficient, unlike the spatially-varying heat transfer coefficient, produced large errors, especially at higher distances from the stagnation point of the air jet on the substrate surface.

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“…For example, the influences of process variables [13,14], the substrate thermal conditions [15], the phase formation [16], and the transient heat transfer were researched [17]. An automated ASRT system was developed for rapid die making of large-sized automobile body panels [18].…”

Section: Introductionmentioning

confidence: 99%

Structural analysis on the arc spraying rapid tooling for sheet forming

Guo

2014

Int J Adv Manuf Technol

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The structural performance of arc spraying rapid tooling (ASRT) directly affects its application in prototype automobile manufacturing. The ASRT is made up of several kinds of materials, which increases the difficulty of structural analysis. In this paper, the properties of arc-sprayed coating and its influence on ASRT were analyzed by tensile test, and the stiffness model of ASRT was established to optimize the structure design. Furthermore, a failure evaluation criterion was adopted to analyze the feasibility and reliability of ASRT. Therefore, a new hybrid structure of ASRT was proposed to reduce the difficulty of its fabrication process. The research results demonstrate that the performance of ASRT can be improved by proper structure design, and it is also proved that ASRT is easy to be fabricated at low cost and can meet the requirements for prototype automobile.

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Finite element modeling of coating formation and transient heat transfer in the electric arc spray process

Cited by 30 publications

References 28 publications

Considerations for the incorporation of measured surfaces in finite element models

Considerations for the incorporation of measured surfaces in finite element models

Heat Transfer Coefficient of an Under-Expanding Cold Spray Air Jet on a Flat Substrate

Structural analysis on the arc spraying rapid tooling for sheet forming

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