Design and manufacturing optimization of epoxy-based adhesive specimens for multiaxial tests
Autor: | Nikolas Manousides, Michael Wentingmann, Claudio Balzani, Alexandros Antoniou |
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Přispěvatelé: | Publica |
Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Materials science
Design Turbine components Wind turbine rotor blades Fibre-reinforced Porosity analysis Multiaxial testing law.invention ddc:690 law Adhesives Manufacturing quality Wind turbines medicine General Materials Science Composite material Porosity Materials of engineering and construction. Mechanics of materials Stress concentration Rotor (electric) Mechanical Engineering Structural adhesives Stiffness Epoxy Turbomachine blades Dewey Decimal Classification::600 | Technik Finite element method 3D printers Reinforcement Wind turbine rotors Mechanics of Materials visual_art Turbine rotor blade Dewey Decimal Classification::600 | Technik::690 | Hausbau Bauhandwerk visual_art.visual_art_medium TA401-492 Adhesive medicine.symptom Material properties ddc:600 Optimisations |
Zdroj: | Materials & Design, Vol 212, Iss, Pp 110213-(2021) Materials and Design 212 (2021) Materials and Design |
DOI: | 10.15488/12484 |
Popis: | 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. © 2021 The Author(s) |
Databáze: | OpenAIRE |
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