压力容器2025，Vol.42Issue(12)：54-63,10.DOI:10.3969/j.issn.1001-4837.2025.12.007
基于声发射的复合材料气瓶疲劳损伤规律研究
Study on fatigue damage patterns of composite cylinders based on acoustic emission
摘要
Abstract
Composite hydrogen storage cylinders offer advantages such as lightweight design,high fatigue resistance,and excellent safety.However,the cylinder body is susceptible to impact‐induced defects,whose accumulation can weaken structural load‐bearing capacity and pose potential safety risks.This study employed acoustic emission(AE)technology on a fatigue loading test platform to conduct real‐time monitoring of damage accumulation in undamaged composite cylinders during cyclic loading.AE tests were performed under fatigue loading cycles ranging from 5 000 to 21 000,revealing patterns in AE signal parameters as functions of loading cycles.The results indicate that the actual fatigue cycle count of the cylinder aligns well with the analytically estimated service life,confirming that the cylinder failure is attributed to normal fatigue mechanisms.As the number of fatigue cycles increases,the AE hit count shows a linear upward trend.Parameters such as amplitude,energy,and voltage reveal that the fatigue damage progression follows distinct stages:Initial accumulation,intense damage,quiescent accumulation,and rapid damage.Analysis of the AE data during fatigue loading using the JCMS-Ⅲ method shows that the hit counts for both Type Ⅰ and Type Ⅱ damage increase with the number of cycles.The growth of Type Ⅱ damage exhibits relatively poor regularity,whereas Type Ⅰ damage(brittle fracture)demonstrates an approximately linear increasing trend.This suggests that brittle fracture damage accumulates continuously during the fatigue loading process,thereby affecting the overall safety performance of the cylinder.Finally,through comparative analysis of parameter variations,this study correlates the evolution of acoustic emission signals throughout the full life cycle of the composite hydrogen storage cylinder with the damage progression.The analysis of cylinder damage indicates that Type Ⅰ damage parameters hold potential for characterizing the fatigue life of composite gas cylinders.关键词
复合材料储氢气瓶/声发射技术/疲劳寿命Key words
composite hydrogen storage cylinder/acoustic emission(AE)technology/fatigue life分类
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邓繁旭,韩冰,刘岩,戴行涛,周银博,陈明升,刘培启..基于声发射的复合材料气瓶疲劳损伤规律研究[J].压力容器,2025,42(12):54-63,10.基金项目
辽宁省科技重大专项(2024JH1/11700017) （2024JH1/11700017）
