Paggi, Marco and Sapora, Alberto An Accurate Thermoviscoelastic Rheological Model for Ethylene Vinyl Acetate Based on Fractional Calculus. International Journal of Photoenergy, 2015 (252740). ISSN 1687-529X (2015)
|
PDF
- Published Version
Available under License Creative Commons Attribution Non-commercial. Download (1MB) | Preview |
Abstract
The thermoviscoelastic rheological properties of ethylene vinyl acetate (EVA) used to embed solar cells have to be accurately described to assess the deformation and the stress state of photovoltaic (PV) modules and their durability. In the present work, considering the stress as dependent on a noninteger derivative of the strain, a two-parameter model is proposed to approximate the power-law relation between the relaxation modulus and time for a given temperature level. Experimental validation with EVA uniaxial relaxation data at different constant temperatures proves the great advantage of the proposed approach over classical rheological models based on exponential solutions.
| Item Type: | Article |
|---|---|
| Identification Number: | 10.1155/2015/252740 |
| Subjects: | T Technology > T Technology (General) T Technology > TH Building construction |
| Research Area: | Computer Science and Applications |
| Depositing User: | Caterina Tangheroni |
| Date Deposited: | 02 Nov 2015 14:43 |
| Last Modified: | 02 Nov 2015 14:43 |
| URI: | http://eprints.imtlucca.it/id/eprint/2803 |
Actions (login required)
 |
Edit Item |
