| 个人简介 | |
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 Prof. Sergei Alexandrov Institute for Problems in Mechanics of the Russian Academy of Sciences, Moscow, Russia |
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| 标题： A Strain Rate Intensity Factor-Based Approach for Predicting the Evolution of Material Properties Near Frictional Interfaces in Metal Forming | |
| 摘要： Friction is responsible for a drastic change in material properties near frictional interfaces in metal forming processes. This change occurs within a thin layer where constitutive equations should be different from those in bulk. In the present paper, this layer is referred to as the fine-grain layer. It is practically impossible to formulate accurate models for the material behavior in the fine-grain layer and friction. In this case, the predictive capacity of numerical solutions is very low, independently of the accuracy of the solution of the corresponding boundary value problem. On the other hand, fine-grain layer properties affect the performance of machine parts and structural components. The present paper reviews an approach for predicting the evolution of material properties near frictional interfaces using a new type of constitutive equations based on the strain rate intensity factor. The approach does not require a realistic formulation of the friction law. It is conceptually similar to the famous approach for predicting the propagation of cracks in fracture mechanics using the stress intensity factor. However, both physics and mathematics are very different. | |
| 简介： Sergei Alexandrov is a Visiting Professor at Beihang University (Beijing, China) under the program “Recruitment Program for Global Experts” (“1000 Talent Plan”) and a Research Professor at the Laboratory for Technological Processes of the Institute for Problems in Mechanics of the Russian Academy of Sciences. He received his Ph.D. in Physics and Mathematics in 1990 and D.Sc. in Physics and Mathematics in 1994. He worked as a Professor at Moscow Aviation Technology Technical University (Russia), a Visiting Scientist at ALCOA Technical Center (USA), GKSS Research Centre (Germany) and Seoul National University (South Korea), and was a Visiting Professor at Aveiro University (Portugal), University of Besancon (France) and Technical University of Malaysia (Malaysia). He is a member of the Russian National Committee on Theoretical and Applied Mechanics. Sergei Alexandrov has published more than 400 papers in journals, books and conference proceedings, including three monographs and around 200 papers in journals indexed in the Web of Science. He has participated in the scientific committee of several international conferences and served as a reviewer in a wide range of international journals. He is on the editorial board of several journals including Continuum Mechanics and Thermodynamics (Springer) and Structural Engineering and Mechanics (Technopress). His research areas are plasticity theory, fracture mechanics, and their applications to metal forming and structural mechanics. | |
