Open AccessSimulation analysis of residual stress of autofrettaged barrel under multi-field coupling loads
Author(s) -
Xiang Gao,
Qi He,
P. K. Liu,
Xingling Shao,
Z. S. Wang
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1507/8/082025
Subject(s) - barrel (horology) , autofrettage , residual stress , finite element method , stress (linguistics) , coupling (piping) , stress field , structural engineering , materials science , cylinder stress , mechanics , process (computing) , composite material , engineering , physics , computer science , linguistics , philosophy , operating system
High-pressure guns repeatedly withstand transient high pressures and high temperatures, which have a great influence on the residual stress of the barrel. In order to study the stress distribution of autofrettaged barrel under multi-field coupling during launch, the mechanical autofrettage gun barrel and finishing process of the barrel was simulated by ANSYS finite element software, in which the finite element model considering the initial residual stress of the autofrettaged barrel was established, and the dynamic and static continuous process simulation of the barrel was carried out. On the basis of obtaining the residual stress distribution, an analytical model under the coupling of transient pressure field and temperature field is established. The APDL language programming is used to calculate the time and space distribution of the stress of the key parts of the barrel. A phenomenon is found that the equivalent stress on the outer surface of the barrel increases sharply with the increase of the pressure, and then rises to the highest point with the temperature of the barrel. After the fire process, the equivalent stress slowly recovers with the decrease of the temperature. The law of external surface stress rise in the fire period is a step process. It provides a theoretical basis for studying the residual stress release law the safety design of barrel.