STUDY ON THE ABNORMAL DYNAMIC RESPONSES OF THIN PLATE SUBJECTED TO EXTREME LOADING AND INFLUENCES OF LOADING CHARACTERISTICS
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    Abstract:

    The dynamic behavior of thin plate under impulsive loading is of high complexity, characterized by large deformation, instantaneity, and severe nonlinearity. When a thin plate is subjected to a shock wave of low impulse, abnormal dynamic response is prone to occur. However, effects of loading characteristics on the abnormal dynamic response of thin plate are not clear. An impulsive loading model validated by experimental data is successfully used to simulate the counter-intuitive response of a thin square plate, and then the effects of negative pressure and decaying parameter on the abnormal dynamic response are studied. Finally, when the stand-off distance increases with a fixed scaled distance, four different modes-secondary intuitive, counter-intuitive, mixed, and initial intuitive modes-are found. The relationship between the different dynamic behavior modes and the plastic dissipation energy is examined.

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History
  • Received:August 21,2021
  • Revised:October 10,2021
  • Adopted:
  • Online: May 06,2022
  • Published: April 25,2022

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