Optimal autofrettage process design for enhancing the fatigue life of the ultra-high-pressure hydrogen valve

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL

Journal of Mechanical Science and Technology Pub Date : 2024-09-03 DOI:10.1007/s12206-024-0820-7

Taeyoung Kim, Hwa Young Kim

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Abstract

This study investigated the optimal autofrettage pressure and design method for improving the fatigue life of an ultra-high-pressure hydrogen valve attached to an ultra-high-pressure hydrogen storage vessel, which is responsible for the supply and control of hydrogen gas. The theoretical values calculated by the theoretical equation for determining the hoop residual stress formed by autofrettage pressure in a circular cylinder and the analytical values of the hoop residual stress obtained through finite element analysis of the autofrettage process in a porous circular cylinder using the commercial finite element analysis program ANSYS Workbench were well matched. Based on the analysis technique obtained for the porous circular cylinder, a quantitative target lifespan was examined for the ultra-high-pressure hydrogen valve with the shape of a porous circular cylinder, considering the maximum pulse pressure. As a result, the previously manufactured ultra-high-pressure hydrogen valve did not meet the quantitative target lifespan. To address this, the optimal values of displacement at specific locations where fatigue failure occurs and autofrettage pressure were designed using response surface methodology (RSM). Through this, fatigue life of 172710 cycles more than 150000 cycles (quantitative target lifespan) was obtained.

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提高超高压氢气阀门疲劳寿命的最佳自动修整工艺设计

本研究探讨了提高负责氢气供应和控制的超高压储氢容器上的超高压氢气阀疲劳寿命的最佳自摩擦压力和设计方法。根据确定圆筒内自磨蚀压力形成的环状残余应力的理论方程计算得出的理论值与使用商业有限元分析程序 ANSYS Workbench 对多孔圆筒内自磨蚀过程进行有限元分析得出的环状残余应力分析值匹配良好。根据多孔圆筒的分析技术，考虑到最大脉冲压力，对多孔圆筒形状的超高压氢气阀的目标寿命进行了定量研究。结果发现，之前制造的超高压氢气阀没有达到定量目标寿命。为解决这一问题，采用响应曲面法（RSM）设计了发生疲劳失效的特定位置的位移和自动钝化压力的最佳值。这样，疲劳寿命达到了 172710 次，超过了 150000 次（定量目标寿命）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Mechanical Science and Technology 工程技术-工程：机械

CiteScore

2.90

自引率

6.20%

发文量

517

审稿时长

7.7 months

期刊介绍： The aim of the Journal of Mechanical Science and Technology is to provide an international forum for the publication and dissemination of original work that contributes to the understanding of the main and related disciplines of mechanical engineering, either empirical or theoretical. The Journal covers the whole spectrum of mechanical engineering, which includes, but is not limited to, Materials and Design Engineering, Production Engineering and Fusion Technology, Dynamics, Vibration and Control, Thermal Engineering and Fluids Engineering. Manuscripts may fall into several categories including full articles, solicited reviews or commentary, and unsolicited reviews or commentary related to the core of mechanical engineering.