24Invited Talk S1-2 The mechanical properties of metallic materials strongly depend on the microstructure. The strength properties are related to the average information of the microstructure, while the fatigue properties are related to the extreme values of the microstructural statistics. Crystal plasticity (CP) analysis can consider the influence of crystal orientation of microstructure, and finite element methods (FEM) for polycrystalline structures have made it possible to predict the mechanical properties of metallic materials. As material parameters in calculations must be determined based on reliable experimental results, and data assimilation methods can be used to obtain appropriate values and motels. CPFEM and data assimilation are very universal and general methods that can be applied to a wide range of problems. In this presentation, some examples will be presented such as optimization of strength-ductility balance of DP steels and optimization of weld geometry for fatigue properties of Mg alloy welds. In-situ structural health monitoring is another important issue to keep a reliability of structural materials. AE (acoustic emission) method is widely applied in industry as one of the effective non-destructive inspection techniques for detecting damage with high sensitivity. However, it is difficult to analyze quantitatively because the wave propagation behavior is greatly affected by the shape of the structure due to the unique reflection characteristics of ultrasonic waves. The authors have been working on the detection of microscopic fractures occurring in various materials by AE analysis for many years. Recently AE data analysis based on data-driven approach has been developed to directly combine the physical quantities and AE measurement results. Analysis of fatigue behavior of various alloys and methodology as structural health monitoring will be presented Photo Abstract Microstructure Based Prediction/Design of Damage Monitoring of Structural MaterialsProfessor, The University of Tokyo, Japan Session 1 ｜Manabu Enoki is Professor of the Department of Materials Engineering at The University of Tokyo. He received a Bachelor of Engineering degree at the Department of Metallurgy and Materials Science, School of Engineering, The University of Tokyo in 1984, and graduated with a Doctor of Engineering in 1989. He started his career as a Research Associate at Research Center for Advanced Science and Technology, The University of Tokyo. He moved to the Department of Materials Engineering in 2000. His research interest concerns the analysis of microfracture in various materials using non-destructive evaluation method, especially acoustic emission technique. He has continued the research on the integrity of structural materials, such as steels, Mg alloys, Ti alloys etc. using various experimental techniques and numerical simulations using physical based model and data-driven approach. NIMS Award Symposium 2023Manabu Enoki Deformation and FractureMechanical Properties and
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