The University of Tokyo · 공학
Fabien Briffod 교수의 연구실은 다공성 및 복합재료의 피로 거동과 미세구조 기반 거동 예측을 중심으로 연구를 진행하고 있습니다. 주로 결정성 유한요소 해석과 나노미세구조 모델링을 활용해, 마그네슘 합금, 봉순성 스틸, 구리/ niobium 복합판 등 다양한 금속재료의 피로 및 연성 거동을 실험과 수치 시뮬레이션을 융합하여 분석합니다. 특히, 미세구조의 결정학적 특성과 비균질성 요소가 피로 균열 기원에 미치는 영향을 규명하는 데 초점을 맞추고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
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
