Publications de Vincent Marc Varanges

Inverse material design to tailor helmet protection against brain injury

Despite widespread helmet usage in high-speed sports, the incidence of brain injuries continues to rise, indicating some deficiencies in current helmet technologies. Existing helmet safety standards only address linear impacts, failing to account adequatel ...

EPFL2025

Helmet material design for mitigating traumatic axonal injuries through AI-driven constitutive law enhancement

Dominique Pioletti, Pierre-Etienne Bourban, Naser Nasrollahzadeh Mamaghani, Vincent Marc Varanges

Sports helmets provide incomplete protection against brain injuries. Here we aim to improve helmet liner efficiency by employing a novel approach that optimizes their properties. By exploiting a finite element model that simulates head impacts, we develope ...

2025

Enhancing the mechanical performance of composite corners through microstructural optimization and geometrical design

Véronique Michaud, Robin Amacher, Vincent Marc Varanges, Yann Albert Gérard Lebaupin, Valentin Rougier

Processing carbon fiber-reinforced composites into corner sections through compression molding poses challenges due to the limited flowability of continuous prepregs, resulting in reduced curved beam strength (CBS). The use of discontinuous plies was explo ...

ELSEVIER SCI LTD2024

Development and Performance Evaluation of Hybrid Iono-organogels for Efficient Impact Mitigation

Dominique Pioletti, Pierre-Etienne Bourban, Vincent Marc Varanges, Vijay Kumar Rana

Dissipative materials are essential for mitigating impact in various automotive, aerospace, and sports equipment applications. This study investigates the efficiency of a novel hybrid iono-organogel in dissipating and absorbing impact energies. The gel con ...

American Chemical Society (ACS)2024

On the durability of surgical masks after simulated handling and wear

Véronique Michaud, Vincent Marc Varanges, Jian Wang, Baris Çaglar, Yann Albert Gérard Lebaupin, René M. Rossi

After the spread of COVID-19, surgical masks became highly recommended to the public. They tend to be handled and used multiple times, which may impact their performance. To evaluate this risk, surgical masks of Type IIR were submitted to four simulated tr ...

Nature Research2022

Community Masks-from an Emergency Solution to an Innovation Booster for the Textile Industry

Véronique Michaud, Vincent Marc Varanges, Baris Çaglar

The COVID-19 pandemic resulted in shortages of personal protective equipment and medical devices in the initial phase. Agile small and medium-sized enterprises from regional textile industries reacted quickly. They delivered alternative products such as te ...

SWISS CHEMICAL SOC2022