The University of Tokyo · Engineering
Professor Fabien Briffod's research lab specializes in the computational and experimental mechanics of advanced metallic materials, with a focus on microstructure-based modeling of deformation and fatigue behavior. The lab investigates the influence of complex microstructural features—such as long-period stacking ordered phases, martensitic laths, and layered composites—on mechanical response and crack initiation under cyclic loading. Using crystal plasticity finite element methods, multi-scale microstructure modeling, and in-situ characterization techniques like acoustic emission, the lab aims to predict and understand fatigue life and failure mechanisms at the microscale. Their work bridges materials design, mechanical testing, and numerical simulation to support the development of high-performance alloys for structural applications.
Figures are computed from collected data and may differ slightly.
The fatigue behavior of four extruded Mg-Y-Zn alloys containing different volume fractions of long-period stacking ordered (LPSO) grains was investigated through a comparative study combining experiments and crystal plasticity finite element simulations. Strain controlled low-cycle fatigue experiments were conducted at different strain amplitudes and revealed a limited cyclic hardening in Mg89Zn4Y7 alloy or softening in Mg99.2Zn0.2Y0.6 and Mg97Zn1Y2 alloys. A decrease in the fatigue life against
A computational study for the modeling of lath martensitic steels, considering morphological and crystallographic features, is presented. A two-dimensional multi-scale tessellation is proposed to generate idealized microstructures with several scales of heterogeneities. The proposed approach is applied to lath martensite where prior austenite grain, packet and block boundaries are explicitly considered as well as their crystallographic relationships. The role of the different sources of heteroge
A numerical study was conducted to evaluate the fatigue crack initiation stage in pure α-iron. A two-dimensional synthetic polycrystalline aggregate was generated with Voronoi tessellation to represent the microstructure. Low-cycle fatigue experiments under fully reversed strain-controlled loading were conducted for different strain amplitudes. The stable stress-strain hysteresis loops were used to calibrate a non-linear kinematic hardening model for metal plasticity suitable for cyclic simulati
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