Dynamic stress analysis of a multilayered structure with radial gaps under plane strain conditions

[+] Author and Article Information
Huadong Liu

School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China

Weiqiang Wang

School of Mechanical Engineering, Shandong University, Jinan 250061, China; Engineering and Technology Research Center for Special Equipment Safety of Shandong Province, Jinan 250061, China; Research Center of Safety Guarantee and Assessment to Special Equipment Shandong University, Jinan 250061, China

1Corresponding author.

ASME doi:10.1115/1.4043296 History: Received November 14, 2017; Revised March 15, 2019


This paper presented a numerical modeling of the dynamic stress of a multilayered structure with radial gaps under plane strain conditions by using the ANSYS/LS-DYNA package. The effects of the dynamic loading profile and the radial gaps height were considered in the investigation. Simulation results clearly showed the stress spatial distribution law along the radial direction and the stress time law. The main conclusions were 1) the layer stress distributes discontinuously at the gaps between layers and distributes unevenly in any single layer, which does not accord with the results calculated by the Làme formula or the modified Pimshtein formula; 2) the stress change of the whole loading process can be divided into four stages: the oscillation stage, the yield stage, the fast increase stage, and the redistribution stage; 3) the waveform of dynamic loading has little effects on the layer stress and the layer plastic strain; 4) the gap heights effects the layer stress and the layer plastic strain, as the gap heights increase, the stress and the plastic deformation of the corresponding layers grow larger for several innermost layers, while the corresponding values grow smaller for several outermost layers.

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