A Numerical Modeling Method of Gelatin Bird Projectile Suitable for Wide-Speed-Range Impact

PENG Hongbo; HOU Runfeng; LI Xuyang; WANG Jizhen; BAI Chunyu; SHI Xiaopeng

doi:10.11858/gywlxb.20240726

Volume 38 Issue 5

Sep 2024

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Chinese Journal of High Pressure Physics > 2024 > 38(5): 054201.

PENG Hongbo, HOU Runfeng, LI Xuyang, WANG Jizhen, BAI Chunyu, SHI Xiaopeng. A Numerical Modeling Method of Gelatin Bird Projectile Suitable for Wide-Speed-Range Impact[J]. Chinese Journal of High Pressure Physics, 2024, 38(5): 054201. doi: 10.11858/gywlxb.20240726

Citation:

PENG Hongbo, HOU Runfeng, LI Xuyang, WANG Jizhen, BAI Chunyu, SHI Xiaopeng. A Numerical Modeling Method of Gelatin Bird Projectile Suitable for Wide-Speed-Range Impact[J]. Chinese Journal of High Pressure Physics, 2024, 38(5): 054201. doi: 10.11858/gywlxb.20240726

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A Numerical Modeling Method of Gelatin Bird Projectile Suitable for Wide-Speed-Range Impact

doi: 10.11858/gywlxb.20240726

1.
College of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China
2.
Sino-European Institute of Aviation Engineering, Civil Aviation University of China, Tianjin 300300, China
3.
Aircraft Strength Research Institute of China, Xi’an 710000, Shaanxi, China
4.
Science and Technology Innovation Research Institute, Civil Aviation University of China, Tianjin, 300300, China

Received Date: 06 Feb 2024
Rev Recd Date: 29 Mar 2024

Available Online: 15 Jul 2024

Issue Publish Date: 29 Sep 2024

Abstract

Abstract

Previous studies revealed that gelatin birds show different mechanical behaviors at different impact velocities. In order to solve the problem that the traditional constitutive methods of gelatin bird cannot be universal in different velocity ranges, the tests of 330 g gelatin birds impacting rigid aluminum alloy plate at 60° and 90° incident angles, covering a velocity range of 70−190 m/s were carried out to record the impact force data and impact morphology. With the increase of velocity, the birds were broken more fully and smaller fragments were observed. The adaptive FEM-SPH (finite element method-smoothed particle hydrodynamics) model of bird was established in LS-DYNA, and a set of constitutive parameters were inverted according to the test results: tangent modulus equals to 1.33 MPa, shear modulus equals to 115.95 MPa, the parameters of Murnaghan equation of state γ equals to 10.49, k₀ equals to 69.77 MPa, bulk modulus equals to 246.4 MPa, failure plastic strain is 1.15, yield stress is 0.21 MPa. The simulation results were in good agreement with the test results, and had higher accuracy compared to the SPH models and the Lagrangian models. The Hugoniot pressure of the adaptive model had the same change trend as the theoretical value, and the stagnation pressure was close to the theoretical value.
- bird impact,
- gelatin bird,
- adaptive,
- finite element method,
- smoothed particle hydrodynamics,
- constitutive parameters identification

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References

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A Numerical Modeling Method of Gelatin Bird Projectile Suitable for Wide-Speed-Range Impact

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