Arts et Métiers

Non-linear mechanical field reconstruction coupling recurrent neural networks with physics-informed graph neural networks

Reconstructing local stress fields in heterogeneous microstructures under non-linear, history-dependent loading remains a major computational bottleneck in multi-scale simulations. We propose a coupled LSTM-GNN framework that links the temporal and spatial aspects of local stress...

Multiscale Method for Estimating the Thermal Properties of Sandwich Materials Using Infrared Thermography

Characterizing the thermal properties of sandwich materials remains complex because it demands a method that can independently analyze both the thin and thick layers within the same sample. We propose combining flash and step thermography methods with analytical modeling based on...

A New Analysis of the Mechanics of Fixed-Plug Tube Drawing with Application on a Low Carbon Steel Tube

Knowledge of the deformations that occur during the plastic forming of metals and the necessary forces is of key importance in engineering. The Fixed-Plug Tube Drawing (FPTD) process permits reductions of the diameter and the wall thickness of a tube to the desired geometry. In t...

Interface Engineering Toward High‐Efficiency CIAS Thin‐Film Solar Cells Using a Cadmium‐Free CuAlSe 2 Buffer Layer: A SCAPS‐1D Investigation

Cu(In,Al)Se 2 (CIAS)‐based thin‐film solar cells remain largely unexplored regarding buffer layer and interface engineering. This work reports a SCAPS‐1D investigation of CuAlSe 2 (CASe) as a cadmium‐free alternative to CdS, starting from a validated Glass/Mo/CIAS/CdS/ZnO/ITO/(Ni...

Mechanical decoupling epitaxy via compliant microdisks yields relaxed transferable AlGaN across broad compositions

Abstract Achieving high-quality, crack-free AlGaN layers across a wide aluminum composition range is critical for ultraviolet optoelectronics but remains challenging due to strain-induced defects from lattice and thermal mismatches. Here we present a mechanical decoupling epitaxy...

Generative surrogate modelling for the efficient design optimization of an RF component

Accurate and efficient design of millimeter-wave components is critical for sixth-generation (6 G) wireless systems, particularly at the D-band where low-loss interconnects are required. Vertically aligned carbon-nanotube (VACNT)–based air-filled waveguides (AFWGs) have recently...

Multimodal linear and nonlinear vibration analysis of cable-stayed beams under free and forced excitations with elastic end supports

This paper presents an analysis of the linear and geometrically nonlinear vibrations of a cable-stayed beam equipped with elastic translational and rotational supports, based on a multimodal analytical formulation. The beam is modeled using Euler–Bernoulli beam theory, while the...

Strategic Lignin Fractionation: Sustainable Encapsulation and Controlled Release of Pelargonic Acid

Abstract Interest in bio-based herbicides, such as pelargonic acid (PA), a naturally occurring fatty acid with rapid post-emergent herbicidal activity, has increased in response to the growing demand for sustainable and effective weed-control strategies. However, its practical ap...

Investigation of slag formation and transport in high strength low alloy steel during wire arc additive manufacturing

Abstract High Strength Low Alloy (HSLA) steel components are increasingly produced using Wire Arc Additive Manufacturing (WAAM) because of its ability to produce complex geometries and achieve high deposition rates. However, preventing the formation of surface oxides, known as si...

Surface Topography Improvement of Micro-Milled Inconel 718 Slots Through Abrasive Deburring: Comparison Between Polishing and Sanding

Burr formation remains a major challenge in micro milling due to reduced tool dimensions and size-effect phenomena, particularly when machining difficult-to-cut materials such as Inconel 718. This study compares the effectiveness of two abrasive deburring processes, polishing and...