TY  - JOUR
ID  - eprints2803
VL  - 2015
UR  - http://www.hindawi.com/journals/ijp/2015/252740/abs/
JF  - International Journal of Photoenergy
IS  - 252740
TI  - An Accurate Thermoviscoelastic Rheological Model for Ethylene Vinyl Acetate Based on Fractional Calculus
AV  - public
Y1  - 2015///
N2  - 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.
A1  - Paggi, Marco
A1  - Sapora, Alberto
PB  - Hindawi Publishing Corporation
SN  - 1687-529X
ER  -