时间：2023年9月22日（周五），10:00
地点：安中大楼多功能厅
报告题目：MY JOURNEY THROUGH MECHANICS EDUCATION AND RESEARCH
报告内容简介：
This is a personal retrospective of the author's professional journey through mechanics research and education (http://mechanics.tamu.edu), which began while the author was a Ph.D. student in USA in 1970. The publication of a seminal paper on 14 primal and dual variational principles [1] and the two books on mathematical theory of finite elements and variational principles with his PhD advisor (Professor J.T. Oden) have provided the inspiration and paved the way for the author's professional journey through applied and computational mechanics [2-6], composite materials and structures [7], least-squares finite elements models [3-6], higher-order shell finite elements [7], and non-local continuum theories [8-12]. The lecture will begin with a brief background of the author followed by an overview of the author's highly-cited shear deformation and layerwise theories for composite laminates [7], the penalty and least-squares finite element models of the flows of viscous incompressible fluids [4], a robust shell finite element [3], nonlocal approaches for modelling architected materials and structures [8,9], and a graph-based finite element analysis of fracture, called GraFEA [10-12]. More emphasis is placed on recent works on shell finite element and nonlocal mechanics. Through the numerical simulation of carefully chosen benchmark problems, it is shown that the developed shell finite element is insensitive to all forms of numerical locking and are the best alternative to 3-D finite elements in saving computational resources while predicting accurate stresses. The graph-based finite element approach with nonlocal criterion (called GraFEA) to study fracture in solids is found to be very robust and accurate in predicting fracture.
References
1. J. T. Oden and J.N. Reddy, Variational Methods in Theoretical Mechanics, Springer-Verlag, NY, 1976.
2. J.N. Reddy, An Introduction to the Finite Element Method, 4th ed., McGraw-Hill, New York, 2019.
3. J.N. Reddy, An Introduction to Nonlinear Finite Element Analysis, 2nd ed., Oxford University Press, Oxford, 2015.
4. J.N. Reddy and D. K. Gartling, The Finite Element Method in Heat Transfer and Fluid Dynamics, 3rd ed., CRC Press, FL, 2010.
5. K.S. Surana and J.N. Reddy, The Finite Element Method for Boundary Value Problems, Mathematics and Computations, CRC Press, Boca Raton, FL, 2017.
6. K.S. Surana and J.N. Reddy, The Finite Element Method for Initial Value Problems, Mathematics and Computations, CRC Press, Boca Raton, FL, 2018.
7. J.N. Reddy, Mechanics of Laminated Composite Plates and Shells: Theory and Analysis, 2nd ed., CRC Press, Boca Raton, FL, 2004 (first edition, 1996).
8. Anssi Karttunen, J.N. Reddy, and J. Romanoff, “Micropolar modelling approach for periodic sandwich beams,” Composite Structures, 185, 656-664, Feb 2018.
9. Anssi Karttunen, J.N. Reddy, and Jani Romanoff, Two-scale micropolar plate model for web-core sandwich panels, International Journal of Solids and Structures, 170, 82-94, 2019.
10. P. Khodabakhshi, J.N. Reddy, and A.R. Srinivasa, A nonlocal fracture criterion and its effect on the mesh dependency of GraFEA,” Acta Mechanica, 230, 3593-3612, 2019.
11. P. Thamburaja, K. Sarah, A. Srinivasa, and J. N. Reddy, “Fracture modeling of plain concrete using nonlocal fracture mechanics and a graph-based computational framework,” Proceedings of the Royal SocietyA, 477, No. 2252, 2021.
12. H. Y. Shin, P. Thamburaja, A. Srinivasa, and J.N. Reddy, On simulating impact in high strength concrete using GraFEA, Extreme Mechanics Letters, 52, article 101618, 2022.
个人简介：
Dr. Reddy is a Distinguished Professor, Regents’ Professor, and inaugural holder of the O’Donnell Foundation Chair IV in Mechanical Engineering at Texas A&M University, College Station, Texas. Dr. Reddy, an ISI highly-cited researcher,is known for his significant contributions to the field of applied and computational mechanics through the authorship of many well-received textbooks and a large number of journal papers. His pioneering works on the development of shear deformation theories (that bear his name in the literature as the Reddy third-order plate theory and the Reddy layerwise theory) have had a major impact and have led to new research developments and applications. Some of the ideas on shear deformation theories and penalty finite element models of fluid flows have been implemented into commercial finite element computer programs like ABAQUS, NISA, and HyperXtrude.In recent years, Reddy's research has focused on the development of locking-free shell finite elements and nonlocal and non-classical continuum mechanics problems.
Dr. Reddy has received numerous honors and awards. Most recent ones include: 2023 Leonardo da Vinci Award from the European Academy of Sciences, 2022 IACM Congress (Gauss-Newton) Medal from the International Association of Computational Mechanics, the 2019 SPTimoshenko Medal from American Society of Mechanical Engineers, the 2018 Theodore von Karman Medal from the American Society of Civil Engineers, the 2017 John von Neumann Medal from the U.S. Association of Computational Mechanics, the 2016 Prager Medal from the Society of Engineering Science, and 2016 ASME Medal from American Society of Mechanical Engineers. He is a member eight national academies, including the US National Academy of Engineering, and foreign fellow of Indian National Academy of Engineering, the Canadian Academy of Engineering, the Brazilian National Academy of Engineering, the Chinese Academy of Engineering, the Royal Engineering Academy of Spain, the European Academy of Sciences, and the European Academy of Sciences and Arts.
欢迎老师和同学参加！