题目：A Hierarchical Material Model Integrating Multi-Scale Phenomena in Composites

报告人 ： Prof. Assimina A. Pelegri

Mechanical & Aerospace Engineering, Rutgers University

主持人：李法新　特聘研究员

时  间：4月28日（周二）下午3:00

地  点：力学楼434会议室

报告内容摘要：A multiscale research approach for Fiber Reinforced Composites (FRCs) will be presented.  The goal of this –on going- research effort is to develop and validate an adaptive, scale invariant material model based on microstructural information that will efficiently account for and predict the material and mechanical behaviors inherent in composites. The research framework incorporates adaptive unit cells  (UC), assembled representative volume elements (RVE), independent state variables (ISV) and multi-level experiments. The successful implementation of the presented model relies upon the fundamental theory of ISV, which provides a carrier and invariant algorithm to bridge the micro phenomena building up to the macroscopic behaviors. Moreover, it includes a quantitative description of the micro geometry and structure by a set of generalized UCs and RVEs, which compose unified geometric primitives that are used to construct and characterize Fiber Reinforced Polymer Composites (FRPC). These primitives also provide an ideal approach for systematically investigating the relationship between microstructure and damage mechanisms. Furthermore, it incorporates a multi-level experimental methodology that affords a realistic and valid environment for modeling. This program is expected to result in a set of new material parameters, in addition to constituent material properties for advanced FRPCs.  Composite microstructures and their intrinsic multi-level failure modes are explored based on the aforementioned parameters.

报告人简介：Dr. Pelegri is now Associate Professor at Mechanical & Aerospace Engineering, Rutgers University. She received her Ph.D. (1997) and MS (1994) in Aerospace Engineering from Georgia Institute of Technology,. She is the recipient of a NSF Career award in the area of Interfacial Mechanics of Anisotropic Materials (2000) and a Pi Tau Sigma/ASME Gold Medal in engineering field (2002). Dr. Pelegri founded and directs the Advanced Structures and Materials Laboratories (AMSL) for materials fabrication and structural diagnostics at Rutgers. Her current research involves analytical solid mechanics, state of the art experimental damage diagnostics, statistical quality control and reliability assessment of composite structures, and interfacial reliability of micro- and nano-structures. She is an active member of the AIAA and ASME. Currently, she is an Associate Editor of the Journal of Engineering Materials and Technology (JEMT) and the Journal of the Americana Institute of Aeronautics and Astronautics (AIAAJ).

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