Lightweight Potential of 3D Endless Fiber Reinforcement of Polyurethane Foam Cores with Spacer Fabrics in Hybrid Sandwich Structures with Fiber Reinforced Thermoplastic Facings

Schäfer, Kay; Nestler, Daisy; Jahn, Kristina; Jentzsch, Henrik; Kroll, Lothar

doi:10.4028/www.scientific.net/kem.809.277

Cited by 4 publications

(4 citation statements)

References 14 publications

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“…During the initial studies in 3dTEX, PU foams and PE fibers were used [6,7]. The main objective was to identify the deformation behavior of the different spacer fabric types.…”

Section: Ge3tex-warp-knitted Woven and Foamed Spacer Fabrics For The Building Envelopementioning

confidence: 99%

Advanced 3D Textile Applications for the Building Envelope

et al. 2021

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Within the field of textile construction, textiles are traditionally used either as decorative elements in interior design or as flat textiles in tensile-stressed lightweight constructions (roofs, temporary buildings, etc.). Technical textiles made of glass or carbon fibers are now also used as steel substitutes in concrete construction. There, flat textiles are also used as lost formwork or shaping semi-finished products. Applications for 3D textiles and in particular spacer textiles have so far only been investigated as part of multilayer constructions in combination with other elements. Otherwise, there are no studies for their application potential in the roof and wall areas of buildings and as a starting structure for opaque and translucent components. The two research projects presented here, "ReFaTex" (adjustable spacer fabrics for solar shading devices) and "ge3TEX" (warp-knitted, woven and foamed spacer fabrics) illustrate for one thing the possibilities for using 3D textiles for the construction of movable and translucently variable solar protection elements in the building envelope. Otherwise they show how 3D textiles in combination with foamed materials can be transformed into opaque, lightweight, self-supporting and insulated wall and ceiling components in the building envelope. Both projects are designed experimentally and iteratively. The results are compared in a qualifying manner, the aim being not to quantify individual measured variables but to explore the development potential of textile construction for sustainable future components and to realize the first demonstrators. In the ReFaTex project, 1:1 demonstrators with different movement mechanisms for controlling the incidence of light were realized. In the ge3TEX project, 1:1 demonstrators made of three different textile and foam materials were added to form new single-origin composite components for ceiling elements. Both projects show the great application potential for 3D textiles in the construction industry.

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“…During the initial studies in 3dTEX, PU foams and PE fibers were used [6,7]. The main objective was to identify the deformation behavior of the different spacer fabric types.…”

Section: Ge3tex-warp-knitted Woven and Foamed Spacer Fabrics For The Building Envelopementioning

confidence: 99%

Advanced 3D Textile Applications for the Building Envelope

et al. 2021

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“…This enables the targeted use of the above-mentioned advantages of thermosets and allows partial recycling after the lifetime of the component by separating the layers. Avila et al developed sandwiches with thermoset facings and thermoplastic core and the authors of this paper investigated the opposite combination [14,15].…”

Section: Introduction and State Of The Artmentioning

confidence: 99%

Quasi-Static and Fatigue Properties of Thermoset Sandwiches with 3D Continuous Fibre Reinforced Polyurethane Foam Core

2022

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Innovative materials for substituting metals are required to reduce the mass of moving components. This decreases the CO2 emissions of overall systems. A thermoset sandwich for high mechanical properties and thermal insulation is presented in this paper. It has an innovative 3D continuous reinforced core, which allows the optimisation of the substance exploitation by wide-ranging possibilities of fibre orientation. This was demonstrated with three sandwich variants. The reference had no core reinforcement and the other two were reinforced with different spacer fabrics. The process chain for the manufacturing consists of Structural Reaction Injection Moulding (SRIM) and Vacuum Assisted Resin Transfer Moulding (VARTM). Significant increases in absolute as well as specific characteristic values were demonstrated by the reinforcement in a compression and bending test. It was also shown that quasi-static characteristic values under fatigue loading are maintained to a greater extent with the core reinforcement. The sandwich material was applied as a floor assembly for a snow groomer. The design was tailor-made for the mechanical, thermal and acoustic requirements. This proved the transferability of the process chain for manufacturing samples to the production of large-volume components with complex geometry.

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“…Some researchers have used sandwich foam materials to modify or add other substances to enhance the mechanical properties of the core layer [22,23]. For example, Schfer et al [24] used rigid and flexible polyurethane foams to make thermoplastic composite interlayers and reinforced them with spacer fabrics. This efficient process allows to produce complex structures in large quantities.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Bending Resistance Properties of Carbon Fiber/Foam Sandwich Structural Composites with Different Laying Angles

Zhu

Cao

Zhang

et al. 2022

Fibres &Amp; Textiles in Eastern Europe

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This research aimed to explore the influence of fiber laying angles on the bending resistance properties of carbon fiber/foam sandwich structural composites. Four kinds of composites with the following laying angles: [0°]8, [0°/45°/90°/−45°]s, [0°/90°]4 and [45°/−45°]4 were prepared and tested in three-point bending experiments. The results obtained showed that the bending resistance performance was the best when the laying angle was [0°]8, while it was the worst when the laying angle was [45°/−45°]4. Besides, it was found that the tensile performance was the best when the fibers were arranged in the 0° direction when the strength utilisation rate was the highest. In addition, by observing the failure morphologies of the composites, the delamination and foam cracking were found in the four groups of composites. In contrast, the phenomenon of significant fracture was found on composites with a laying angle of [45°/−45°]4 only, indicating it had a poor bending resistance performance.

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Lightweight Potential of 3D Endless Fiber Reinforcement of Polyurethane Foam Cores with Spacer Fabrics in Hybrid Sandwich Structures with Fiber Reinforced Thermoplastic Facings

Cited by 4 publications

References 14 publications

Advanced 3D Textile Applications for the Building Envelope

Advanced 3D Textile Applications for the Building Envelope

Quasi-Static and Fatigue Properties of Thermoset Sandwiches with 3D Continuous Fibre Reinforced Polyurethane Foam Core

Comparison of the Bending Resistance Properties of Carbon Fiber/Foam Sandwich Structural Composites with Different Laying Angles

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