Numerical Analysis of the Impact Resistance of Composite A-Shaped Sandwich Structures
Abstract
:1. Introduction
2. Theoretical Background
3. Numerical Model Building
4. Analysis of Results and Discussion
4.1. Ballistic Limit Velocity
4.1.1. Verification of the Ballistic Limit Velocity Model
4.1.2. Comparison of the Ballistic Limit Velocity of A-Shaped Sandwich Structures and Y-Shaped Sandwich Structures
4.2. Failure Mode
4.2.1. Failure Mode Verification of Structures
4.2.2. Impact Damage Process for the Composite A-Shaped Core Sandwich Structures
4.2.3. Damage to the Face Sheet, Rear Sheet, and A-Shaped Core
4.3. Numerical Simulation of the Impact Position
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Category | Symbol | Value |
---|---|---|
Upper platform (mm) | l | 4.1 |
Mid-platform (mm) | e | 10.4 |
Height of middle beam (mm) | h | 9.0 |
Overall height of the sandwich structure (mm) | H | 27.0 |
Thickness (mm) | t | 1.2 |
Inclined angle of legs () | 60 |
Category | Symbol | Value |
---|---|---|
Longitudinal modulus (MPa) | 100,000 | |
Transverse modulus (MPa) | 8000 | |
Out-of-plane modulus (MPa) | 8000 | |
Poisson’s ratio | 0.21, 0.21, 0.3 | |
Shear modulus (MPa) | 0.21, 0.21, 0.3 | |
Shear strength (MPa) | 104, 104, 86 | |
Longitudinal tensile strength (MPa) | 2100 | |
Longitudinal compressive strength (MPa) | 700 | |
Transverse tensile strength (MPa) | 42 | |
Transverse compressive strength (MPa) | 160 | |
Out-of-plane tensile strength (MPa) | 42 | |
Out-of-plane compressive strength (MPa) | 1600 | |
Density (kg/m) | 1500 |
Test Group | Experimental Results of Composite Sandwich Structure [19] | Numerical Results of Composite Sandwich Structure | Error (%) | ||
---|---|---|---|---|---|
(m/s) | (m/s) | (m/s) | (m/s) | ||
1 | 70.3 | – | 70.3 | – | - |
2 | 93.8 | – | 93.8 | – | - |
3 | 120.3 | – | 120.3 | – | - |
4 | 133.8 | 12.3 | 133.8 | 10.9 | 11.38 |
5 | 147.1 | 51.6 | 147.1 | 61.4 | 18.99 |
6 | 158.5 | 86.3 | 158.5 | 76.7 | 11.12 |
7 | 172.6 | 98.3 | 172.6 | 110.1 | 12 |
8 | 200.3 | 141.6 | 200.3 | 148.4 | 4.8 |
9 | 222.8 | 164.8 | 222.8 | 174.3 | 5.76 |
Test Group | Numerical Results of the Composite Y-Shaped Core Sandwich Structure | Numerical Results of the Composite A-Shaped Core Sandwich Structure | ||
---|---|---|---|---|
(m/s) | (m/s) | (m/s) | (m/s) | |
1 | 70.3 | 0 | 70.3 | 0 |
2 | 93.8 | 0 | 93.8 | 0 |
3 | 120.3 | 0 | 120.3 | 0 |
4 | 133.8 | 14.3 | 133.8 | 0 |
5 | 147.1 | 58.1 | 147.1 | 0 |
6 | 158.5 | 97.2 | 158.5 | 60.7 |
7 | 172.6 | 109.2 | 172.6 | 103.3 |
8 | 200.3 | 155.3 | 200.3 | 140.6 |
9 | 222.8 | 173.4 | 222.8 | 165.4 |
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Gu, X.; Li, J.; Huang, J.; Ao, Y.; Zhao, B. Numerical Analysis of the Impact Resistance of Composite A-Shaped Sandwich Structures. Materials 2023, 16, 5031. https://doi.org/10.3390/ma16145031
Gu X, Li J, Huang J, Ao Y, Zhao B. Numerical Analysis of the Impact Resistance of Composite A-Shaped Sandwich Structures. Materials. 2023; 16(14):5031. https://doi.org/10.3390/ma16145031
Chicago/Turabian StyleGu, Xuetao, Jiawen Li, Ji Huang, Yaoliang Ao, and Bingxiong Zhao. 2023. "Numerical Analysis of the Impact Resistance of Composite A-Shaped Sandwich Structures" Materials 16, no. 14: 5031. https://doi.org/10.3390/ma16145031