绣山讲坛第428讲-Gradient Theory for Modelling of Nanosized Structures
作者： 已浏览：10次 更新日期：2026-05-12
报告题目：Gradient Theory for Modelling of Nanosized Structures
报告时间：2026年5月13日，星期三, 14:00 PM
报告地点：龙赛理科楼南楼 519会议室
主讲人：Prof. Jan Sladek，Institute of Construction and Architecture, Slovak Academy of Sciences, Bratislava, Slovakia
摘要：
An overview of research activities in recent years is given.Flexoelectricity.Phenomenon of flexoelectricity is explained for a cantilever beam with the direct flexoelectric effect and large von Karman strains. A straight interface crack between two dissimilar dielectric materials described by the gradient theory of flexoelectricity under a dynamic load is analyzed by the mixed FEM.The Mixed FEM for Thermoelectric Problems with the Thomson Effect.The effective thermoelectric conversion in finite nano-sized structures is investigated. The Ohm law for electric current conduction and Fourier law for heat conduction are supplemented by the Seebeck and Peltier effects with assuming the Thomson effect in present study. Original boundary value problems in thermoelectricity result into coupled field problems with a nonlinearity due to the Joule heating.Crack Analyses in Nano-Sized Structures Under a Joule Heating.Crack problems in nano-sized elastic structures under the Joule heating are analyzed by the finite element method (FEM). The variational principle is applied for derivation of coupled electro-thermo-mechanical governing equations. The temperature field is described by classical Fourier`s law and it is not influenced by mechanical field. Transient heat conduction is considered since it is the slowest process among all other coupled fields here.Dr. Jan Sladek, Member of Academy of European, Member of Slovakia Academy of Sciences, president of Slovak Society for Mechanics, head of the Department of Mechanics at Slovak Academy of Science, received his Ph.D. in Applied Mechanics at the Institute of Construction of Architecture, Slovak Academy of Sciences, Slovakia in 1981. He is also Full Professor at Mechanical Engineering Department of Slovak Technical University. His principal research area is modeling of advanced materials. He has published 387 WOS papers and 7 monographs (books). His research works are cited more than 13295 times with H=61. His research works have been honored many times. He has received the Prize of Slovak Academy of Sciences twice (1985, 2003) and the Prize of Slovak Literal Foundation also twice (1986, 1999). He was awarded by Aurel Stodola Prize in 2002, Eric Reissner medal in 2010 and Humboldt Prize in 2019 for his distinguished results in mechanics.
主讲人简介：
Prof. Vladimir Sladek received the degree RNDr. (Dr. Rer. Nat.) in Physics from the Comenius University, Bratislava, Slovakia; the PhD and DrSc degrees in Applied mechanics from the Slovak Academy of Sciences. From 1981 he is research fellow at the Institute of Construction and Architecture, Slovak Academy of Sciences where he is now a senior researcher. He is interested in the computational mechanics with applications to mechanics of solids and fracture mechanics including multi-field problems. His main contribution belongs to the development of the Boundary element method (BEM), Regularization techniques in BEM, and Mesh-free methods. Recently he is interested in higher-grade continuum modelling. His teaching activities in recent two decades were oriented on applied mathematics and computational mechanics at the Slovak Technical University in Bratislava, Slovakia. He received several fellowships from abroad (Cornell Univ., USA; Shinshu Univ., Japan; Wessex Inst. of Technol., U.K.; UCLA, USA, Univ. of Siegen, Germany). His research results have been recognized several times by awarding the Slovak Academy Prize, Prize of Slovak Literary Agency, Plaque of Aurel Stodola. He is a Member of Learned Society of Slovak Academy of Sciences; Fellow of the Wessex Institute, UK; Distinguish Fellow ICCES; Editor of Int. Jour. Eng. Analysis with Boundary Elements and member of the Editorial Boards of several international journals.
