Design and manufacturing optimization of epoxy-based adhesive specimens for multiaxial tests

Specimen design and manufacturing quality are decisive factors in the experimental determination of material properties, because they can only be reliably determined if all undesired influences have been minimized or are precisely known. The manufacture of specimens from highly viscous, two-componen...

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Autores principales:	Michael Wentingmann, Nikolas Manousides, Alexandros Antoniou, Claudio Balzani
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Structural adhesives Multiaxial testing Porosity analysis Wind turbine rotor blades Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/3f5bcfe4e1c3472b9f680d3f335bbb49
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spelling	oai:doaj.org-article:3f5bcfe4e1c3472b9f680d3f335bbb492021-11-10T04:17:33ZDesign and manufacturing optimization of epoxy-based adhesive specimens for multiaxial tests0264-127510.1016/j.matdes.2021.110213https://doaj.org/article/3f5bcfe4e1c3472b9f680d3f335bbb492021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0264127521007681https://doaj.org/toc/0264-1275Specimen design and manufacturing quality are decisive factors in the experimental determination of material properties, because they can only be reliably determined if all undesired influences have been minimized or are precisely known. The manufacture of specimens from highly viscous, two-component and fiber-reinforced structural adhesives presents a challenge from this point of view. Therefore, a design and manufacturing optimization procedure for fiber-reinforced structural adhesives and multiaxial testing was developed. It incorporated a finite element parametric study to minimize stress concentrations in the specimen geometry. Vacuum speed mixing was combined with 3D printed mold inserts to enable the manufacture of homogeneous specimens with negligible porosity. The method was demonstrated by means of a structural adhesive used to manufacture wind turbine rotor blades, while the manufacturing quality was verified with high-resolution X-ray microscopy (μCT scanning), enabling detailed detection of pores and geometrical imperfections. The results of uniaxial and biaxial static tests show maximized strength and stiffness properties, while the scatter was minimized in comparison to that stated in international literature. A comparison of the mechanical properties and associated manufacturing techniques is given. The comparison includes a porosity analysis of a specimen from an industrial dosing machine used for rotor blade manufacture.Michael WentingmannNikolas ManousidesAlexandros AntoniouClaudio BalzaniElsevierarticleStructural adhesivesMultiaxial testingPorosity analysisWind turbine rotor bladesMaterials of engineering and construction. Mechanics of materialsTA401-492ENMaterials & Design, Vol 212, Iss , Pp 110213- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Structural adhesives Multiaxial testing Porosity analysis Wind turbine rotor blades Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Structural adhesives Multiaxial testing Porosity analysis Wind turbine rotor blades Materials of engineering and construction. Mechanics of materials TA401-492 Michael Wentingmann Nikolas Manousides Alexandros Antoniou Claudio Balzani Design and manufacturing optimization of epoxy-based adhesive specimens for multiaxial tests
description	Specimen design and manufacturing quality are decisive factors in the experimental determination of material properties, because they can only be reliably determined if all undesired influences have been minimized or are precisely known. The manufacture of specimens from highly viscous, two-component and fiber-reinforced structural adhesives presents a challenge from this point of view. Therefore, a design and manufacturing optimization procedure for fiber-reinforced structural adhesives and multiaxial testing was developed. It incorporated a finite element parametric study to minimize stress concentrations in the specimen geometry. Vacuum speed mixing was combined with 3D printed mold inserts to enable the manufacture of homogeneous specimens with negligible porosity. The method was demonstrated by means of a structural adhesive used to manufacture wind turbine rotor blades, while the manufacturing quality was verified with high-resolution X-ray microscopy (μCT scanning), enabling detailed detection of pores and geometrical imperfections. The results of uniaxial and biaxial static tests show maximized strength and stiffness properties, while the scatter was minimized in comparison to that stated in international literature. A comparison of the mechanical properties and associated manufacturing techniques is given. The comparison includes a porosity analysis of a specimen from an industrial dosing machine used for rotor blade manufacture.
format	article
author	Michael Wentingmann Nikolas Manousides Alexandros Antoniou Claudio Balzani
author_facet	Michael Wentingmann Nikolas Manousides Alexandros Antoniou Claudio Balzani
author_sort	Michael Wentingmann
title	Design and manufacturing optimization of epoxy-based adhesive specimens for multiaxial tests
title_short	Design and manufacturing optimization of epoxy-based adhesive specimens for multiaxial tests
title_full	Design and manufacturing optimization of epoxy-based adhesive specimens for multiaxial tests
title_fullStr	Design and manufacturing optimization of epoxy-based adhesive specimens for multiaxial tests
title_full_unstemmed	Design and manufacturing optimization of epoxy-based adhesive specimens for multiaxial tests
title_sort	design and manufacturing optimization of epoxy-based adhesive specimens for multiaxial tests
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/3f5bcfe4e1c3472b9f680d3f335bbb49
work_keys_str_mv	AT michaelwentingmann designandmanufacturingoptimizationofepoxybasedadhesivespecimensformultiaxialtests AT nikolasmanousides designandmanufacturingoptimizationofepoxybasedadhesivespecimensformultiaxialtests AT alexandrosantoniou designandmanufacturingoptimizationofepoxybasedadhesivespecimensformultiaxialtests AT claudiobalzani designandmanufacturingoptimizationofepoxybasedadhesivespecimensformultiaxialtests
_version_	1718440641908703232

Design and manufacturing optimization of epoxy-based adhesive specimens for multiaxial tests

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