Professor Shaofan Li现为美国加州大学伯克利分校土木与环境工程系教授，将于2018.6.7至2018.6.12访问我中心，关于Prof. Li的学术简介请见附件。
题目：Introduction to Peridynamics and Its Simulations of Fracture and Fragmentation of Solids and Granular Materials
Peridynamics is a relatively new nonlocal meshfree particle method that can be used to conduct fast simulation of fracture and fragmentation of solids without remesh. In this talk, we shall introduce the theory of both bond-based peridynamics as well as the state-based peridynamics, their computational formulations, focusing on issues of computer implementation and physical modeling. Moreover, we shall discuss our recent wok on developing a nonlinear peridynamics model for granular materials, such as the non-saturated and the full saturated soils, and how to apply them to simulate soil fragmentation due to both impulse and blast loads.
The presented work is the latest development of computational geotechnical materials.
First, we have extended the state-based peridynamics technique, which replaces the local differential equation with a non-local integral equation. We have implemented the Drucker-Prager constitutive model in peridynamics for finite deformation. Here the peridynamics form of the Hughes and Winget theory is derived for the finite deformation constitutive update. Second, we have developed a peridynamics U-p formulation for saturated soils. Third, numerical simulations have been carried out to verify the proposed peridynamics formulations in soil fragmentation for several bench mark problems. The comparison of the numerical, theoretical, and experimental results indicate that peridynamics model has the capability in prediction of the complex soil fragmentation under blast loads.
Dr. Shaofan Li is currently a full professor of applied and computational mechanics at the University of California-Berkeley. Dr. Li graduated from the Department of Mechanical Engineering at the East China University of Science and Technology (Shanghai, China) with a Bachelor Degree of Science in 1982; he also holds Master Degrees of Science from both the Huazhong University of Science and Technology (Wuhan, China) and the University of Florida (Gainesville, FL, USA) in Applied Mechanics and Aerospace Engineering in 1989 and 1993 respectively. In 1997, Dr. Li received a PhD degree in Mechanical Engineering from the Northwestern University (Evanston, IL, USA), and he was also a post-doctoral researcher at the Northwestern University during 1997-2000.
In 2000, Dr. Li joined the faculty of the Department of Civil and Environmental Engineering at the University of California-Berkeley. Dr. Shaofan Li has also been a visiting Changjiang Professor in the Huazhong University of Science and Technology, Wuhan, China (2007-2013). Dr. Shaofan Li is the recipient of IACM (International Association of Computational Mechanics) Fellow Award ; Distinguished Fellow Award of ICCES ; ICACM Computational Mechanics Award , USACM Fellow Award (2013), A. Richard Newton Research Breakthrough Award , and NSF Career Award . Dr. Li has published more than140 articles in peer-reviewed scientific journals (SCI) with h-index 42 (Google Scholar), and he is also the author of two research monographs/graduate textbooks