RT Dissertation/Thesis T1 Lagrangian formulation and numerical simulation of multiphysics models. Application to electric upsetting A1 Martínez Suárez, Iván K1 numerical simulation K1 mathematical modelling K1 thermo-electrical-mechanical K1 electric upsetting AB Forming processes are fundamental in modern industry, as they enable the permanent deformation of a workpiece into a desired geometry while preserving cohesion and mass. Compared with casting or machining, forming offers advantages such as low material waste, short production times, precise final shapes, and improved mechanical properties. Nevertheless, it also demands high forces, costly equipment, and faces limitations with complex geometries. Conventional bulk and sheet forming techniques, which primarily rely on mechanical contact, are widely used but remain challenged by high cost, energy consumption, and environmental impact. To address demands for lighter components, higher precision, and greater sustainability, energy-assisted forming methods have been developed. These include electromagnetic forming, which employs Lorentz forces; ultrasonic-assisted forming, which reduces friction and resistance through vibrations; and electrically assisted forming, which lowers deformation resistance by Joule heating. YR 2026 FD 2026 LK https://hdl.handle.net/10347/46738 UL https://hdl.handle.net/10347/46738 LA eng DS Minerva RD 21 abr 2026