HESAM Université

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...

Elevated substrate preheating tailors microstructural evolution and enhances fatigue resistance in laser powder bed fusion H13 tool steel

Fatigue performance remains a key limitation for laser powder bed fusion (LPBF) tool steels due to the strong coupling between process-induced defects and microstructural heterogeneity. Elevated substrate preheating has been proposed as an effective strategy to improve the proces...

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...

An extended norm activation model of waste reduction intentions with personality cluster effects

Understanding the psychosocial determinants of waste reduction intentions remains essential for promoting sustainable consumption and recycling behaviors, particularly in underrepresented developing regions. This study examines waste reduction intentions in Guayas Province, Ecuad...

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...

Simulation of the Rotational Molding Process of Polyethylene Using the Smoothed Particle Hydrodynamics Method

ABSTRACT This work presents the development of a numerical model based on the smoothed particle hydrodynamics (SPH) method to simulate the rotational molding process of powder thermoplastic polymers, used in the manufacture of liners for high‐pressure hydrogen tanks. Rotational m...

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...