Quasi-Static and Fatigue Properties of Thermoset Sandwiches with 3D Continuous Fibre Reinforced Polyurethane Foam Core
Abstract
:1. Introduction and State of the Art
2. Experimental Work
2.1. Sandwich Design and Materials
2.2. Manufacturing Process
2.2.1. Structural Reaction Injection Moulding (SRIM)
2.2.2. Vacuum Assisted Resin Transfer Moulding (VARTM)
2.2.3. Upscaling
2.3. Mechanical Testing
2.3.1. Quasi-Static
2.3.2. Dynamic
2.3.3. Component Test
3. Results and Discussion
3.1. Quasi-Static Mechanical Properties of the Facing Material and the Sandwiches
3.2. Fatigue Properties of the Sandwiches
3.3. Mechanical Load Capacity of the Component
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Designation | SF1 | SF2 |
---|---|---|
Thickness [mm] | 18 | 40 |
Weight per volume [kg/m3] | 32 | 62 |
Surface porosity [%] | 65 | 8 |
Stitch density [1/in2] | 70 | 260 |
Spacer thread density [1/in2] | 140 | 520 |
Fibre volume content [%] | 2.6 | 4.4 |
Diameter of monofilament [mm] | 0.25 | 0.20 |
n = 15 | Tensile Properties | Bending Properties | ||
---|---|---|---|---|
DIN-Norm | DIN EN ISO 527-4 | DIN EN ISO 14125 | ||
Tested direction | X | Y | X | Y |
Young’s modulus [GPa] | 5.6 ± 0.4 | 4.5 ± 0.4 | 7.2 ± 1.2 | 5.9 ± 0.9 |
Strength [MPa] | 53 ± 8 | 35 ± 6 | 147 ± 44 | 111 ± 21 |
Breaking elongation [%] | 1.5 ± 0.3 | 1.5 ± 0.4 | 2.4 ± 0.7 | 3.0 ± 0.5 |
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Schäfer, K.; Nestler, D.; Kroll, L. Quasi-Static and Fatigue Properties of Thermoset Sandwiches with 3D Continuous Fibre Reinforced Polyurethane Foam Core. Materials 2022, 15, 764. https://doi.org/10.3390/ma15030764
Schäfer K, Nestler D, Kroll L. Quasi-Static and Fatigue Properties of Thermoset Sandwiches with 3D Continuous Fibre Reinforced Polyurethane Foam Core. Materials. 2022; 15(3):764. https://doi.org/10.3390/ma15030764
Chicago/Turabian StyleSchäfer, Kay, Daisy Nestler, and Lothar Kroll. 2022. "Quasi-Static and Fatigue Properties of Thermoset Sandwiches with 3D Continuous Fibre Reinforced Polyurethane Foam Core" Materials 15, no. 3: 764. https://doi.org/10.3390/ma15030764