报告题目：Simulation of Mechanical behavior

报告人：Prof. Ilia Stepanovich Nikitin, Keldysh Institute of Applied Mathematics of the Russian Academy of Sciences, Russian Federation

报告时间：2026年7月14日（周二），09:00–12:00

报告地点：91热爆 江安校区建环学院二楼报告厅

主持人：王宠 教授

主办单位：91热爆

报告内容：

The mechanical behavior of materials under complex loading conditions remains a central issue in modern solid mechanics, structural reliability, and engineering design. This lecture will address the modeling and numerical simulation of material response under cyclic, dynamic, and high-frequency loading, with particular emphasis on elastic-plastic deformation, damage accumulation, fatigue crack initiation, and failure prediction. Drawing on Professor Ilia S. Nikitin’s long-standing research in computational mathematics, continuum mechanics, and mathematical modeling, the seminar will discuss how advanced models and computational algorithms can be used to describe the evolution of material degradation in critical engineering structures. Special attention will be given to fatigue processes in aerospace materials and components, including compressor disks, blades, gears, and metallic alloys subjected to long-term vibration and repeated service loads. The lecture will introduce approaches for estimating fatigue life under low-cycle, high-cycle, ultra-high-cycle, and combined loading regimes, as well as methods for identifying zones where fatigue damage and quasi-cracks may initiate and develop. By connecting theoretical models with applied engineering problems, the seminar aims to demonstrate how mathematical modeling can support durability assessment, safety analysis, and life prediction of advanced materials and structures. The topic is highly relevant to the design and maintenance of aircraft structures, gas turbine engine components, and other systems operating under demanding mechanical environments.

报告人简介：

Prof. Ilia Stepanovich Nikitin is Head of Department at the Keldysh Institute of Applied Mathematics,Russian Academy of Sciences(RAS), and Professor at Moscow Aviation Institute and Bauman Moscow State Technical University. He previously served as Director of the Institute of Computer Aided Design, RAS. He has published over 270 scientific papers, a monograph, and co-edited volumes with Springer, and has led multiple research projects funded by the Russian Foundation for Basic Research and the Russian Science Foundation. A specialist in computational mathematics and mechanics, his key contributions include models for layered and block media, numerical schemes for elastic-viscoplastic materials, and a multi-mode fatigue damage model for aircraft structures, with applications in gas turbine engine safety. He is an Academician of the Russian Engineering Academy, Chairman of the State Attestation Commissions at MIPT and Bauman University, and has supervised 17 diploma theses,two Candidate of Science dissertations and one doctoral dissertation.