Biography
Prof. Chenlin Li
Prof. Chenlin Li
Lanzhou Jiaotong University, China
Title: Thermally nonlinear non-Fourier coupled piezoelectric thermoelasticity problems with temperature-dependent elastic constants and thermal conductivity and nonlinear finite element analysis of transient
Abstract: 
Piezoelectric structure stands as smart sensors (or actuators) in control systems or high-efficient energy harvesters in powering systems which have aroused significant interests to thermo-electromechanical coupling problems that consider second sound effect of heat conduction. However, the assumption of invariable elastic constants and thermal conductivity within them will be no longer applicable under non-isothermal conditions for piezoelectric solids, verified from experiments. Unlike other available works in which governing equations are linearized, the temperature-dependent elastic constants and thermal conductivity is further considered in this research resulting in the nonlinear non-Fourier coupled piezoelectric thermoelasticity governing equations. To achieve nonlinear solutions, nonlinear time-domain finite element method is developed to directly solve nonlinear finite element governing equations, of which maximally avoids the precision losses within the applications of the integrated transformation method. A numerical example is given to investigate the nonlinear transient thermo-electromechanical responses of a two-dimensional orthotropic piezoelectric plate of crystal class mm2. The numerical results reveal that thermally nonlinear thermo-nonlinear responses are greatly affected by temperature-dependent thermal conductivity and elastic constants, whilst heat (elastic) wave propagation and electrical energy harvesting ability in piezoelectric solids will be maximally lifted, but larger harmful thermal induced stresses should be avoided in such cases.
Biography: 
Dr. Chenlin Li is an associate professor at School of Civil Engineering, Lanzhou Jiaotong University, China. He mainly contributes to the problems of coupled multi-field mechanics under extreme thermal environment, including:
1. Constitutive modeling;
2. Mechanics of materials;
3. Coupled multi-field mechanics at the micro/nanoscale;
4. Heat and mass transfer at the micro/nanoscale;
5. Structural dynamic responses analysis;
6. Computational mechanics.
His research works have been published on the important international SCI academic journals, for examples, Composite Structures, Applied Mathematical Modelling, International Journal of Mechanical Sciences, European Journal of Mechanics-A/Solids, Waves in Random and Complex Media. He presided 4 research funds from governments. He was also invited as reviewer in some Top journals of International Journal of Heat and Mass Transfer, Applied Mathematical Modelling and so on. Also, he was also invited as Keynote Speaker, Honorable Speaker in some international academic conferences.