Determining the Characteristics of Composite Structure Laminae by Optical 3D Measurement of Deformation with Numerical Analysis

Experimental determination of the elastic constants of orthotropic composite materials and their bearing capacity (strength) for furniture intended for sitting, and numerical verification of the experiment results by analysing with the final elements, was performed on the basis of the theory of elas...

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Autores principales:	Biserka Nestorović, Dušan Skakić, Ivica Grbac
Formato:	article
Lenguaje:	EN
Publicado:	University of Zagreb, Faculty of Forestry and Wood Technology 2011
Materias:	optical 3D measurement chair shell composite material constants stress beech wood finite elements Forestry SD1-669.5
Acceso en línea:	https://doaj.org/article/ed9850e997084bf1b7951132c1e135d8
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spelling	oai:doaj.org-article:ed9850e997084bf1b7951132c1e135d82021-12-02T08:00:23ZDetermining the Characteristics of Composite Structure Laminae by Optical 3D Measurement of Deformation with Numerical Analysis0012-67721847-1153https://doaj.org/article/ed9850e997084bf1b7951132c1e135d82011-09-01T00:00:00Zhttp://hrcak.srce.hr/file/106967https://doaj.org/toc/0012-6772https://doaj.org/toc/1847-1153Experimental determination of the elastic constants of orthotropic composite materials and their bearing capacity (strength) for furniture intended for sitting, and numerical verification of the experiment results by analysing with the final elements, was performed on the basis of the theory of elasticity of orthotropic and anisotropic composite materials. The requisite and sufficient material constants were determined in the experiments: moduli of elasticity and Poisson’s coefficients (longitudinal and tangential) and skate modulus for plain stress. These constants, calculated by 3D measurements of deformation, are sufficient for determining the constitutive matrix of the lamina, and for reducing stiffness of the composite irrespective of the thickness of the layers, fibre orientation and choice of material. Experiments were conducted for the stiffness, shear and flexing of uniformly and complexly layered beech veneer sheets, while for new materials experiments for stiffness and shear in a uniform orientation were sufficient. Analysis of stiffness and deformations were conducted layer by layer, as well as by reduced volume stiffness for multilayered orthotropic shells of chair systems by a method of final elements by application of a composite final element, where combined reduced membrane matrices and flexing matrices are used. Numerical verification of the experiments, including systems of furniture intended for sitting – chairs – was conducted using the KOMIPS software system, which contains in its library a composite final element of the sheet. Experiments with chairs were performed with the aim of determining the stiffness of such systems, and they were confirmed by analytical results and measurement of the real movements on selected models. The results of research provide the design, re-design, construction and determination of the dimensions of not just chairs, but also of any other girder or surface systembased on laminates.Biserka NestorovićDušan SkakićIvica GrbacUniversity of Zagreb, Faculty of Forestry and Wood Technologyarticleoptical 3D measurementchairshellcompositematerial constantsstressbeech woodfinite elementsForestrySD1-669.5ENDrvna Industrija, Vol 62, Iss 3, Pp 193-200 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	optical 3D measurement chair shell composite material constants stress beech wood finite elements Forestry SD1-669.5
spellingShingle	optical 3D measurement chair shell composite material constants stress beech wood finite elements Forestry SD1-669.5 Biserka Nestorović Dušan Skakić Ivica Grbac Determining the Characteristics of Composite Structure Laminae by Optical 3D Measurement of Deformation with Numerical Analysis
description	Experimental determination of the elastic constants of orthotropic composite materials and their bearing capacity (strength) for furniture intended for sitting, and numerical verification of the experiment results by analysing with the final elements, was performed on the basis of the theory of elasticity of orthotropic and anisotropic composite materials. The requisite and sufficient material constants were determined in the experiments: moduli of elasticity and Poisson’s coefficients (longitudinal and tangential) and skate modulus for plain stress. These constants, calculated by 3D measurements of deformation, are sufficient for determining the constitutive matrix of the lamina, and for reducing stiffness of the composite irrespective of the thickness of the layers, fibre orientation and choice of material. Experiments were conducted for the stiffness, shear and flexing of uniformly and complexly layered beech veneer sheets, while for new materials experiments for stiffness and shear in a uniform orientation were sufficient. Analysis of stiffness and deformations were conducted layer by layer, as well as by reduced volume stiffness for multilayered orthotropic shells of chair systems by a method of final elements by application of a composite final element, where combined reduced membrane matrices and flexing matrices are used. Numerical verification of the experiments, including systems of furniture intended for sitting – chairs – was conducted using the KOMIPS software system, which contains in its library a composite final element of the sheet. Experiments with chairs were performed with the aim of determining the stiffness of such systems, and they were confirmed by analytical results and measurement of the real movements on selected models. The results of research provide the design, re-design, construction and determination of the dimensions of not just chairs, but also of any other girder or surface systembased on laminates.
format	article
author	Biserka Nestorović Dušan Skakić Ivica Grbac
author_facet	Biserka Nestorović Dušan Skakić Ivica Grbac
author_sort	Biserka Nestorović
title	Determining the Characteristics of Composite Structure Laminae by Optical 3D Measurement of Deformation with Numerical Analysis
title_short	Determining the Characteristics of Composite Structure Laminae by Optical 3D Measurement of Deformation with Numerical Analysis
title_full	Determining the Characteristics of Composite Structure Laminae by Optical 3D Measurement of Deformation with Numerical Analysis
title_fullStr	Determining the Characteristics of Composite Structure Laminae by Optical 3D Measurement of Deformation with Numerical Analysis
title_full_unstemmed	Determining the Characteristics of Composite Structure Laminae by Optical 3D Measurement of Deformation with Numerical Analysis
title_sort	determining the characteristics of composite structure laminae by optical 3d measurement of deformation with numerical analysis
publisher	University of Zagreb, Faculty of Forestry and Wood Technology
publishDate	2011
url	https://doaj.org/article/ed9850e997084bf1b7951132c1e135d8
work_keys_str_mv	AT biserkanestorovic determiningthecharacteristicsofcompositestructurelaminaebyoptical3dmeasurementofdeformationwithnumericalanalysis AT dusanskakic determiningthecharacteristicsofcompositestructurelaminaebyoptical3dmeasurementofdeformationwithnumericalanalysis AT ivicagrbac determiningthecharacteristicsofcompositestructurelaminaebyoptical3dmeasurementofdeformationwithnumericalanalysis
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Determining the Characteristics of Composite Structure Laminae by Optical 3D Measurement of Deformation with Numerical Analysis

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