期刊
COMPOSITE STRUCTURES
卷 95, 期 -, 页码 630-638出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2012.08.014
关键词
Photovoltaic module; Fracture mechanics; Computational methods; Multi-physics; Multi-scale
资金
- European Research Council under the European Union's Seventh Framework Programme (FP)/ERC Grant [306622]
- Italian Ministry of Education, University and Research [RBFR107AKG]
A multi-physics and multi-scale computational approach is proposed in the present work to study the evolution of microcracking in polycrystalline Silicon (Si) solar cells composing photovoltaic (PV) modules. Coupling between the elastic and the electric fields is provided according to an equivalent circuit model for the PV module where the electrically inactive area is determined from the analysis of the microcrack pattern. The structural scale of the PV laminate (the macro-model) is coupled to the scale of the polycrystals (the micro-model) using a multiscale nonlinear finite element approach where the macro-scale displacements of the Si cell borders are used as boundary conditions for the micro-model. Intergranular cracking in the Si cell is simulated using a nonlinear fracture mechanics cohesive zone model (CZM). A case-study shows the potentiality of the method, in particular as regards the analysis of the microcrack orientation and distribution, as well as of the effect of cracking on the electric characteristics of the PV module. (c) 2012 Elsevier Ltd. All rights reserved.
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