Analysis of deformation characteristics of circular thin plate structure under the cumulative effect of explosive load

DOI:	10.11809/bqzbgcxb2024.12.018
Keywords:	thin plate structure; cumulative deformation; plastic deformation;deformation mode
Abstract:	In order to study the deformation characteristics of thin plate structures under the cumulative action of explosive loads, the cumulative deformation test of thin plate structure with nine groups charges quantity and explosion heights was designed. The deformation modes of the structure under single explosive load and the cumulative deformation characteristics of the structure under different deformation modes were discussed. The deformation laws under single explosive load and multiple explosive loads were also compared and analyzed. The results show that the deformation modes of the edge supported circular thin plate structure under single explosive load includes anomalous deformation, plastic deformation and boundary tensile tear failure. Under the initial counterintuitive deformation state, the cumulative deformation modes of the structure include local plastic deformation, plastic deformation, and boundary tensile tear failure. Under the initial plastic deformation state, the cumulative deformation modes of the structure include plastic deformation and boundary tensile tear failure. When the total explosive charge amount is the same and the explosive height is close, the maximum plastic deformation amplitude of the structure under single explosive load can reach 1.65 times that of the cumulative deformation under two explosive charges. Besides, the tensile failure of the thin plate structure can also occur at the boundary when the repeated cumulative action of low amplitude explosive loads.
Issue:	Vol. 45 No. 12 (2024)
Published:	2024-12-30
PDF HTML