Multiphysical Modeling of Transport Phenomena During Laser Welding of Dissimilar Steels

Métais, Alexandre; Matteı, Simone; Tomashchuk, Iryna; Gaied, Sadok

doi:10.1016/j.phpro.2016.08.145

Cited by 9 publications

(2 citation statements)

References 8 publications

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“…In order to estimate the time needed to reach the target temperature, a study based on a transient regime was carried out. The time evolution of the heating temperature profile (T) of the tablecloth (including fabric coated with three layers of carbon patches and two layers of copper electrodes) can be estimated by the following first-order heat transfer problem [73,74]:…”

Section: A First-order Response In Transient Regimementioning

confidence: 99%

Development and Optimization of 3D-Printed Flexible Electronic Coatings: A New Generation of Smart Heating Fabrics for Automobile Applications

Diatezo

Tonellato³

et al. 2023

Micromachines

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Textile-based Joule heaters in combination with multifunctional materials, fabrication tactics, and optimized designs have changed the paradigm of futuristic intelligent clothing systems, particularly in the automobile field. In the design of heating systems integrated into a car seat, conductive coatings via 3D printing are expected to have further benefits over conventional rigid electrical elements such as a tailored shape and increased comfort, feasibility, stretchability, and compactness. In this regard, we report on a novel heating technique for car seat fabrics based on the use of smart conductive coatings. For easier processes and integration, an extrusion 3D printer is employed to achieve multilayered thin films coated on the surface of the fabric substrate. The developed heater device consists of two principal copper electrodes (so-called power buses) and three identical heating resistors made of carbon composites. Connections between the copper power bus and the carbon resistors are made by means of sub-divide the electrodes, which is critical for electrical–thermal coupling. Finite element models (FEM) are developed to predict the heating behavior of the tested substrates under different designs. It is pointed out that the most optimized design solves important drawbacks of the initial design in terms of temperature regularity and overheating. Full characterizations of the electrical and thermal properties, together with morphological analyses via SEM images, are conducted on different coated samples, making it possible to identify the relevant physical parameters of the materials as well as confirm the printing quality. It is discovered through a combination of FEM and experimental evaluations that the printed coating patterns have a crucial impact on the energy conversion and heating performance. Our first prototype, thanks to many design optimizations, entirely meets the specifications required by the automobile industry. Accordingly, multifunctional materials together with printing technology could offer an efficient heating method for the smart textile industry with significantly improved comfort for both the designer and user.

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Section: A First-order Response In Transient Regimementioning

confidence: 99%

Development and Optimization of 3D-Printed Flexible Electronic Coatings: A New Generation of Smart Heating Fabrics for Automobile Applications

Diatezo

Tonellato³

et al. 2023

Micromachines

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show abstract

“…Progress in the field of modeling and numerical simulation of welding processes is tightly connected to the continual evolution and advances in computational methods and computer capabilities. From the simple solution of temperature fields, the modeling of welding processes has now moved into the area of solving complex coupled problems, which include the analysis of temperature, fluid, stress-strain, electro-magnetic and diffusion fields taking into account metallurgical transformations [7][8][9][10][11][12]. The primary challenge in numerical simulation of welding and related processes lies in modeling the heat input for the thermal analysis.…”

Section: Introductionmentioning

confidence: 99%

Heat source models for numerical simulation of laser welding processes – a short review

Behúlová,

Babalová

2024

J. Phys.: Conf. Ser.

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In recent decades, numerical modeling and computer simulation have become an integral part of the design, analysis and optimization of fusion welding processes, including laser welding. In general, laser welding processes involve the interaction of multiple physical phenomena, such as thermal, fluid, metallurgical, chemical, mechanical, and diffusion effects, which makes the development of a simulation model difficult and complex. In addition to the geometric characteristics of the parts to be welded, their material properties must be specified in a wide temperature range, as well as the conditions for heat removal to the environment or shielding gas. One of the most complex tasks in the preparation of a simulation model of the laser welding processes consists in the selection of an appropriate heat source model to accurately determine the heat input to the weld. Very important is also the process of experimental verification and validation of the developed simulation models. In this paper, a short examination of significant mathematical heat source models for numerical simulation of laser welding is provided. Numerical analysis of laser welding of sheets made of S650MC steel is accomplished using conical 3D heat source model with the support of the ANSYS code. The effect of geometrical characteristics of the conical volumetric heat source model on the computed width, length, and depth of the weld pool is discussed, along with evaluation of maximum weld pool temperature.

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A Review on Joining of Dissimilar Metals with Highly Differential Thermomechanical Properties

Tanmay,

Alam,

Panda

2024

J. of Materi Eng and Perform

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Multiphysical Modeling of Transport Phenomena During Laser Welding of Dissimilar Steels

Cited by 9 publications

References 8 publications

Development and Optimization of 3D-Printed Flexible Electronic Coatings: A New Generation of Smart Heating Fabrics for Automobile Applications

Development and Optimization of 3D-Printed Flexible Electronic Coatings: A New Generation of Smart Heating Fabrics for Automobile Applications

Heat source models for numerical simulation of laser welding processes – a short review

A Review on Joining of Dissimilar Metals with Highly Differential Thermomechanical Properties

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