Keywords
Team
MPI - Mécanique Physique des Polymères
Biography
Lionel Freire is a researcher specializing in the study of additive manufacturing processes and polymer materials, particularly semi-crystalline polymers such as polyamide-12 (PA12). His work focuses on the multiphysical modeling of laser powder bed fusion (L-PBF) processes, incorporating thermal, mechanical, and phase-transition phenomena. He has developed advanced numerical frameworks to simulate the complex interactions between heat, crystallization, and deformations, with a particular focus on boundary conditions and meshing strategies to optimize the accuracy of part-scale simulations. His research also examines the influence of processing parameters, such as preheating temperature, on the dimensional accuracy and final properties of the manufactured components. At the same time, he explores the crystallization kinetics and densification behaviors of semi-crystalline polymers, contributing to a better understanding of the mechanisms underlying forming processes such as injection molding and additive manufacturing.
Publication(s)
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2026
Deformation and stress evolution during laser powder bed fusion of semi-crystalline polyamide-12 DOI : 10.1016/j.addma.2025.105061
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2025
Improved Thermal Resolution and Macroscale Phase Transformation Modeling of the Semi-Crystalline Polymer Polyamide-12 during Laser Powder Bed Fusion DOI : 10.1016/j.amf.2024.200185
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2024
Phase transformation and powder densification behavior of the polyamide-12 during powder bed fusion process DOI : 10.1016/j.optlastec.2024.111288
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2023
Thermal behavior and morphology evolution of polyamide 12 in laser powder bed fusion process: Experimental characterization and numerical simulation DOI : 10.1016/j.jmapro.2023.08.015
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2019
Transcrystallinity versus spherulitic crystallization in polyamide 66: An experimental study DOI : 10.1002/pcr2.10028
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2018
Analysis of the No-Flow criterion based on accurate crystallization data for the simulation of injection molding of semi-crystalline thermoplastics DOI : 10.3139/217.3593
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2017
Crystallization of polypropylene in the presence of biomass-based fillers of different compositions DOI : 10.1016/j.polymer.2017.09.006
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2016
Modeling the mechanical behavior and impact properties of polypropylene and copolymer polypropylene DOI : 10.1007/s10965-016-0947-z
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2015
An analysis of transcrystallinity in polymers DOI : 10.1063/1.4937288
PhD supervision
- 2021 Multi-scale study of the additive manufacturing of polyamide-12 using the L-PBF process: from experimental characterization to numerical simulation XU Zhongfeng