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首页> 外文期刊>Journal of Mechanical Science and Technology >Residual stress analysis of swage autofrettaged gun barrel via finite element method
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Residual stress analysis of swage autofrettaged gun barrel via finite element method

机译：型锻自动装填枪管的残余应力的有限元分析

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摘要

Residual stress analysis of swage autofrettaged gun barrel is performed in this study via finite element (FE) method. The swage autofrettage technique is one of the modernized pre-stressing methods to enhance the load bearing capacity and fatigue life of all gun barrels. An oversized moving mandrel is forced inside the gun barrel, which deforms the material through physical interference. The process is analyzed by evaluating residual stresses using a commercially available software package. The deformation effects caused by the mandrel and the geometrical variation of the mandrel on the gun barrel are analyzed in this study. This field has been insufficiently researched, but the effect of pre-stressing on the barrel, and at the start and mid-length for the swaging process, is not well examined. Thus, further analysis is required. The variations and effectiveness of the designed pressure band model are shown to define the problem easily. Results are evaluated at mid-length using a fixed fringe width percentage (A defined percentage of gun barrel axial length). The desired effects are well validated through numerical investigation using FE analysis. This study reveals that the geometry should be designed very thoroughly to determine the after effects. If too many variations occur, then the initial force requirement is extremely high; otherwise, the desired swaging effect cannot be achieved.
机译：本研究通过有限元（FE）方法对型锻自动装填枪管的残余应力进行了分析。型锻自紧技术是现代化的预应力方法之一，可以提高所有枪管的承载能力和疲劳寿命。一个过大的移动心轴被迫进入枪管，这会通过物理干扰使材料变形。使用可商购的软件包通过评估残余应力来分析该过程。分析了由心轴引起的变形效应和心轴在枪管上的几何变化。对这一领域的研究还不够充分，但是没有对预应力对料筒以及型锻过程的开始和中间长度的影响进行很好的研究。因此，需要进一步分析。显示了设计压力带模型的变化和有效性，可以轻松定义问题。使用固定的条纹宽度百分比（枪管轴向长度的定义百分比）在中等长度下评估结果。通过使用有限元分析进行数值研究，可以很好地验证所需的效果。这项研究表明，应非常彻底地设计几何形状以确定后效应。如果发生太多变化，则初始力要求非常高;否则，达不到预期的型锻效果。

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