工程可靠性与随机力学国际联合研究中心

2025年第9期（总第101期）学术报告

工程力学研究中心第55期学术报告

文远讲坛322期

报告主题

TOPIC

复杂网络材料：从统计建模到连续介质模拟

Complex network materials: from statistical modelling to continuum simulations

报告人

SPEAKER

Prof. Marco Paggi

Full Professor, Deputy Rector, IMT School for Advanced Studies Lucca, Italy

报告时间

TIME

2025年9月18日（周四）下午15:30-16:30

报告地点

VENUE

同济大学土木大楼 A305

主持人

CHAIR

陈建兵教授、彭勇波教授联系人：谢建康

报告摘要

Abstract

Materials are inherently network-based systems, whose physical properties are defined by the structure of the chemical bonds that connect their atoms or molecules. At the engineering scale, collagen and cellulose-based materials are typical examples where the overall emergent mechanical response is the result of the nonlinear interplay between their constituent fibers, their progressive debonding and failure. The understanding of the behaviour of those materials may lead to innovative non-periodic network materials inspired by their unique morphological features.

In this seminar, a novel statistical micromechanical model resembling a fiber-bundle model used in physics (pure cross-sectional) but incorporating the fiber cross-linking effects (fiber longitudinal information) is proposed to predict the uniaxial stress-strain response of a random cross linked network material. Then, to tackle biaxial stress states, two nonlinear anisotropic elastic continua are proposed, and for the very first time a corelation between them and the statistical approach is established, enabling their concurrent use at the macro- and at the micro-scales. Several examples on in-situ testing of paper materials are provided to validate the theory.

报告人简介

Speaker

BioProf. Marco Paggi is a Full Professor of Structural Mechanics at the IMT School for Advanced Studies Lucca, Italy. He serves as the Deputy Rector and directs both the Multi-scale Analysis of Materials (MUSAM) research unit and the MUSAM-Lab. 

He received his PhD in Structural Mechanics from the Politecnico di Torino, Italy, in 2005. In 2010, he was awarded an Alexander von Humboldt Research Fellowship at Leibniz Universität Hannover, Germany. He has held visiting positions at several prestigious institutions, including Université Paris-Est (France), the University of Girona (Spain), and the Indian Institute of Technology Delhi (India). Prior to his current appointment, he was a professor at the Politecnico di Torino, the University of Pisa, and the University of Trento. 

His research focuses on contact mechanics, fracture mechanics, and multiphysics simulations, with applications to a wide range of structural and material systems. Professor Paggi is the author of over 250 peer-reviewed publications and has been the Principal Investigator of numerous EU-funded projects, including two prestigious grants from the European Research Council (ERC).