Dynamic impact responses of a residual stress tube subjected to movable composite loading

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (2) : 51-56.

LI Zheng，ZHANG Xiangyan，LIU Ning

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Abstract

To investigate the dynamic response evolution of a large-caliber autofrettaged barrel under the combined impact of gas pressure and dynamic load of a rotating band, a method for generating 3D residual stress field was proposed, and the mesh was created by the script modeling strategy.Considering the changes in energy form and the relative ratio, the secondary work coefficient and friction model were redefined by combinedly using multiple user subroutines, and the communication between the nonlinear projectile-barrel coupled model and the interior ballistic equations was established to realize the loading process of the movable composite load along with propellant combustion.The study shows that the numerical results based on this loading solution can accurately reflect real responses during barrel launching.The residual stress obviously affect the stress distribution pattern and evolution of the barrel, the distribution of the two kinds of loads are different, and the dynamic force of the band acting on the barrel can not be ignored.

Key words

residual stress / script modeling / composite load / barrel response / movable load

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LI Zheng，ZHANG Xiangyan，LIU Ning. Dynamic impact responses of a residual stress tube subjected to movable composite loading[J]. Journal of Vibration and Shock, 2020, 39(2): 51-56

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