Purpose: Laminated glass composite panel (LGCP) with at least one flexible plastic/
viscoelastic interlayer is considered. The purpose of this paper is to determine the material
properties of the constituents of LGCP required for accurate modelling of the laminated
glass structures.
Design/methodology/approach: The proposed approach includes the following three
type of tests: non-destructive tests for determining mechanical properties of the glass
layers (based on wave propagation), mechanical tests and finite element simulations for
determining properties of the interlayers, measuring residual stresses in glass layers using
novel methods and equipment (non-destructive, wave propagation based).
Findings: Methodology and procedures for determining material properties of the LGCP.
Research limitations/implications: Due to fact that the shear moduli of the
viscoelastic interlayers and glass skin layers differs up to thousands times, the direct
application of the classical sandwich theory may lead to inaccurate results. The layer wise
plate theory with viscoelastic interlayer should be applied. In the case of layer wise theory,
the material properties should be determined for each layer (not averaged properties for
laminate only).
Practical implications: The proposed approach allows to determine the properties of
the LGCP components with high accuracy and form base for development of accurate plate
model for modelling vibration, buckling and bending of the LGCP. The effect of the residual
stresses is most commonly omitted in engineering applications. However, in the case of
tempered glass the residual stresses are significant and have obviously impact on stress-
strain behaviour of the laminated glass panel.
Originality/value: Study consists of valuable parts, i.e. determining residual stresses in
glass performed in cooperation with private company GlasStress Ltd. Special software and
measuring equipment are developed. Further LGCP interlayer mechanical properties are
tested experimentally and using simulation tools for design optimization purposes.
One of the most important steps during manufacturing of solar modules is lamination. This paper focuses on monitoring of behavior of used encapsulant Ethylene/Vinyl-Acetate (EVA) and impact on overall quality of module during lamination. Monitoring is performed by employing external thermocouple sensor inside the lamination chamber as well as by. Real-time analysis of the results helps to predict the quality of final product in terms of ensuring lamination quality in real time and provides possibility to tune the process during manufacturing cycle to achieve the best result of encapsulant cross-linking.
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