Degradation of a LDPE film applied as a greenhouse cover design material: the effect of ageing and mechanical modelling

Abstract: In this work, we studied the mechanical performance of an LDPE film (0.22 mm in thickness) used as a material in the design of greenhouse covers. We investigated the effects of ageing at different periods of its service life and applying chemical substance treatments used as pesticides on...

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Autores principales: Garzón,Eduardo, Ortiz-Rodríguez,Isabel-María, Castillo,José, Sánchez-Soto,Pedro-José
Lenguaje:English
Publicado: Escuela de Construcción Civil, Pontificia Universidad Católica de Chile 2018
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Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2018000300457
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spelling oai:scielo:S0718-915X20180003004572019-03-28Degradation of a LDPE film applied as a greenhouse cover design material: the effect of ageing and mechanical modellingGarzón,EduardoOrtiz-Rodríguez,Isabel-MaríaCastillo,JoséSánchez-Soto,Pedro-José LDPE films greenhouse covers degradation finite elements mechanical properties Abstract: In this work, we studied the mechanical performance of an LDPE film (0.22 mm in thickness) used as a material in the design of greenhouse covers. We investigated the effects of ageing at different periods of its service life and applying chemical substance treatments used as pesticides on greenhouse crops and after breakage using mechanical traction. Numerical simulations were performed using the finite element method. For this purpose, one section of the complete geometry of the greenhouse cover and different load conditions (1-5 kPa) were considered for the modelling. The performance of the polymer was assumed to be linearly elastic to simplify the governing equations. The study demonstrated that the LDPE film used was no longer effective as a greenhouse cover film due to the degradation of its mechanical properties. It was shown that the general performance of this film was in the plastic zone and its performance was non-linear. The results deduced from the present study are of interest because they show the material failure process of greenhouse covers in relation to the degradation process.info:eu-repo/semantics/openAccessEscuela de Construcción Civil, Pontificia Universidad Católica de ChileRevista de la construcción v.17 n.3 20182018-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2018000300457en10.7764/rdlc.17.3.457
institution Scielo Chile
collection Scielo Chile
language English
topic LDPE films
greenhouse covers
degradation
finite elements
mechanical properties
spellingShingle LDPE films
greenhouse covers
degradation
finite elements
mechanical properties
Garzón,Eduardo
Ortiz-Rodríguez,Isabel-María
Castillo,José
Sánchez-Soto,Pedro-José
Degradation of a LDPE film applied as a greenhouse cover design material: the effect of ageing and mechanical modelling
description Abstract: In this work, we studied the mechanical performance of an LDPE film (0.22 mm in thickness) used as a material in the design of greenhouse covers. We investigated the effects of ageing at different periods of its service life and applying chemical substance treatments used as pesticides on greenhouse crops and after breakage using mechanical traction. Numerical simulations were performed using the finite element method. For this purpose, one section of the complete geometry of the greenhouse cover and different load conditions (1-5 kPa) were considered for the modelling. The performance of the polymer was assumed to be linearly elastic to simplify the governing equations. The study demonstrated that the LDPE film used was no longer effective as a greenhouse cover film due to the degradation of its mechanical properties. It was shown that the general performance of this film was in the plastic zone and its performance was non-linear. The results deduced from the present study are of interest because they show the material failure process of greenhouse covers in relation to the degradation process.
author Garzón,Eduardo
Ortiz-Rodríguez,Isabel-María
Castillo,José
Sánchez-Soto,Pedro-José
author_facet Garzón,Eduardo
Ortiz-Rodríguez,Isabel-María
Castillo,José
Sánchez-Soto,Pedro-José
author_sort Garzón,Eduardo
title Degradation of a LDPE film applied as a greenhouse cover design material: the effect of ageing and mechanical modelling
title_short Degradation of a LDPE film applied as a greenhouse cover design material: the effect of ageing and mechanical modelling
title_full Degradation of a LDPE film applied as a greenhouse cover design material: the effect of ageing and mechanical modelling
title_fullStr Degradation of a LDPE film applied as a greenhouse cover design material: the effect of ageing and mechanical modelling
title_full_unstemmed Degradation of a LDPE film applied as a greenhouse cover design material: the effect of ageing and mechanical modelling
title_sort degradation of a ldpe film applied as a greenhouse cover design material: the effect of ageing and mechanical modelling
publisher Escuela de Construcción Civil, Pontificia Universidad Católica de Chile
publishDate 2018
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2018000300457
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AT castillojose degradationofaldpefilmappliedasagreenhousecoverdesignmaterialtheeffectofageingandmechanicalmodelling
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