Bioinspired Helicoidal Composite Structure Featuring Functionally Graded Variable Ply Pitch
Abstract
:1. Literature Review
2. Functionally Graded Pitch (FGP) Laminates
2.1. Mechanical Performance
2.2. Design Description
3. Materials and Methods
3.1. Sample Manufacturing
3.2. Three-Point Bending
3.3. Low Velocity Impact
4. Results and Discussion
4.1. Flexural Tests
4.2. Impact Tests
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
Appendix A. Thermal Warpage
Benchmark | |
---|---|
[A] Matrix: | kN/mm |
[B] Matrix: | kN |
[D] Matrix: | kNmm |
Functionally Graded Helicoidal Symmetric | |
[A] Matrix: | kN/mm |
[B] Matrix: | kN |
[D] Matrix: | kNmm |
Functionally Graded Helicoidal Asymmetric | |
[A] Matrix: | kN/mm |
[B] Matrix: | kN |
[D] Matrix: | kNmm |
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Lay-Up Title | Ply Structure |
---|---|
Benchmark | [0/0/+45/−45/90/0/+45/−45/90]s |
FGPS (c = 1.2) | [0/5/15/30/50/75/105/140/180]s |
FGPA (c = 5) | [0/1.2/3.5/7.1/11.8/17.7/24.7/32.9/42.4/52.9/64.7/77.6/91.8/107.1/123.5/141.2/160/180] |
Design | Flexural Modulus (GPa) | % Variation | Flexural Strength (MPa) | % Variation | Flexural Strain (Maximum Load) | % Variation | SEE (kJ/m3) | % Variation |
---|---|---|---|---|---|---|---|---|
Benchmark | 79.2 ± 2.32 | - | 842 ± 19.56 | - | 0.0109 ± 0.00035 | - | 507 ± 25 | - |
FGPS | 86.3 ± 4.88 | +9% | 891 ± 34.8 | +6% | 0.0154 ± 0.00030 | −1% | 532 ± 25 | +5% |
FGPA | 67.6 ± 3.91 | −15% | 1015 ± 44.37 | +21% | 0.0154 ± 0.00042 | +41% | 900 ± 63 | +78% |
Configuration | Impact Energy (J) | Impact Force Peak (N) | % Variation | Maximum Displacement (mm) | % Variation | Damaged Area (mm2) | % Variation | Absorbed Energy (J) | % Variation |
---|---|---|---|---|---|---|---|---|---|
Benchmark | 15 | 7377.08 ± 88.4 | - | 3.61 ± 0.052 | - | 859.97 ± 54.74 | - | 4.60 ± 0.057 | - |
Symmetric | 15 | 6934.79 ± 64.54 | −6% | 3.91 ± 0.022 | +8% | 1041.12 ± 92.19 | +21% | 4.36 ± 0.172 | −5% |
Asymmetric | 15 | 6955.12 ± 62.43 | −6% | 4.37 ± 0.080 | +21% | 437.24 ± 106.54 | −49% | 2.56 ± 0.042 | −44% |
Benchmark | 25 | 10,059.44 ± 44.58 | - | 4.72 ± 0.033 | - | 1734.86 ± 100.82 | - | 7.17 ± 0.1857 | - |
Symmetric | 25 | 9259.95 ± 74.99 | −8% | 5.37 ± 0.390 | +14% | 2147.79 ± 54.24 | +24% | 7.59 ± 0.2763 | +6% |
Asymmetric | 25 | 9229.94 ± 73.07 | −8% | 5.47 ± 0.037 | +16% | 1163.69 ± 79.05 | −33% | 5.73 ± 0.2970 | −20% |
Residual Energy (kJ) | 15 J | % Variation | 25 J | % Variation | Standard Deviation | 15 J | 25 J |
---|---|---|---|---|---|---|---|
Benchmark | 3.43 × 104 | 0% | 2.77 × 104 | 0% | Benchmark | 5.66 × 103 | 2.30 × 103 |
FGPS | 5.49 × 104 | 60% | 3.91 × 104 | 41% | FGPS | 5.65 × 103 | 8.68 × 102 |
FGPA | 7.25 × 104 | 111% | 5.45 × 104 | 97% | FGPA | 1.23 × 104 | 9.41 × 103 |
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Meo, M.; Rizzo, F.; Portus, M.; Pinto, F. Bioinspired Helicoidal Composite Structure Featuring Functionally Graded Variable Ply Pitch. Materials 2021, 14, 5133. https://doi.org/10.3390/ma14185133
Meo M, Rizzo F, Portus M, Pinto F. Bioinspired Helicoidal Composite Structure Featuring Functionally Graded Variable Ply Pitch. Materials. 2021; 14(18):5133. https://doi.org/10.3390/ma14185133
Chicago/Turabian StyleMeo, Michele, Francesco Rizzo, Mark Portus, and Fulvio Pinto. 2021. "Bioinspired Helicoidal Composite Structure Featuring Functionally Graded Variable Ply Pitch" Materials 14, no. 18: 5133. https://doi.org/10.3390/ma14185133