Critical condition for tensile tearing failure of unidirectional stiffened plate under strong impact load

YAO Xiongliang; ZHOU Yanpei; WANG Zhi; WEI Qingyuan

doi:10.11883/bzycj-2023-0182

Volume 44 Issue 2

Feb. 2024

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YAO Xiongliang, ZHOU Yanpei, WANG Zhi, WEI Qingyuan. Critical condition for tensile tearing failure of unidirectional stiffened plate under strong impact load[J]. Explosion And Shock Waves, 2024, 44(2): 023104. doi: 10.11883/bzycj-2023-0182

Citation:

YAO Xiongliang, ZHOU Yanpei, WANG Zhi, WEI Qingyuan. Critical condition for tensile tearing failure of unidirectional stiffened plate under strong impact load[J]. Explosion And Shock Waves, 2024, 44(2): 023104. doi: 10.11883/bzycj-2023-0182

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Critical condition for tensile tearing failure of unidirectional stiffened plate under strong impact load

doi: 10.11883/bzycj-2023-0182

1.
College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China
2.
College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China

Received Date: 2023-05-17
Rev Recd Date: 2023-10-17

Available Online: 2023-12-21

Publish Date: 2024-02-06

Abstract

Abstract

The critical condition of tensile tearing failure of stiffened plate under impact load was studied. Firstly, the unidirectional stiffened plate with fixed support under uniform impact load was simplified into beam structure model attached with band plate. Based on the theoretical solution of the impact deformation of the fixed beam, the theoretical solution of the maximum deformation of the stiffened plate was given. At the same time, the applicable condition for calculating the large deformation of the unidirectional stiffened plate by using the “beam theory” model was given. Then, the motion mode of the fixed beam under strong impact load was divided into four stages. Based on the composite motion model, the relation between the tensile strain at the end of fixed beam and the maximum deformation of beam was corrected. Finally, taking equivalent strain equal to failure strain as the tensile tear condition, the critical condition of tensile tear of stiffened plate under impact load was established. In this paper, three unidirectional stiffened plates of T profile with different stiffness were selected, and the maximum deformation and critical tensile tearing load of the stiffened plates were analyzed by commercial finite element software LS-DYNA. The numerical simulation results show that the theoretical solution of maximum deformation of unidirectional stiffened plate and the critical condition of tensile tear failure based on the “beam theory” are applicable, and The error of theoretical and numerical simulation is less than 15%. Therefore, the theory in this paper can be applied to practical engineering prediction and has certain guiding significance.
- stiffened plate,
- tensile tear,
- large plastic deformation,
- impact load,
- damage evaluation

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References(26)

References

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