{"title":"Study on the damage patterns of ring-stiffened cylindrical shells under underwater explosion(UNDEX) loading","authors":"Yuan Gao , Xiyu Jia , Xi Lu , Feng Ma","doi":"10.1016/j.ijimpeng.2025.105312","DOIUrl":null,"url":null,"abstract":"<div><div>Structural damage caused by underwater explosions (UNDEX) is a critical research area in engineering and industrial applications. This study investigates the damage patterns of a typical ring-stiffened aluminum cylinder subjected to UNDEX through experiments and numerical simulations. A series of Φ9 m × 9 m explosion pond tests were conducted to validate numerical simulations and analyze structural responses under varying standoff distances (12/10.4/9.6/8.8 charge radii). An Arbitrary Lagrangian-Eulerian (ALE)-based method was employed to further explore the effects of charge weight (10/50/100/200/400/800 g) and standoff distance on structural failure. The results identified three failure modes—sagging deformation, wavelike deformation, and rupture—with sagging and rupture as the dominant modes. The coupling processes between the impact load and structural response for each mode were analyzed in detail. Based on these findings, a damage phase diagram was developed to illustrate the relationship between explosive mass, standoff distance, and damage modes, providing an intuitive representation of failure mechanisms. Additionally, dimensional analysis identified two key parameters—scaled distance and charge radius—that influence damage outcomes, with their relative influence weights quantified. This study provides critical insights into the failure mechanisms of ring-stiffened cylindrical shells under underwater explosions and offers valuable guidance for predicting damage and designing protective structures in engineering applications.</div></div>","PeriodicalId":50318,"journal":{"name":"International Journal of Impact Engineering","volume":"202 ","pages":"Article 105312"},"PeriodicalIF":5.1000,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Impact Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0734743X25000934","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Structural damage caused by underwater explosions (UNDEX) is a critical research area in engineering and industrial applications. This study investigates the damage patterns of a typical ring-stiffened aluminum cylinder subjected to UNDEX through experiments and numerical simulations. A series of Φ9 m × 9 m explosion pond tests were conducted to validate numerical simulations and analyze structural responses under varying standoff distances (12/10.4/9.6/8.8 charge radii). An Arbitrary Lagrangian-Eulerian (ALE)-based method was employed to further explore the effects of charge weight (10/50/100/200/400/800 g) and standoff distance on structural failure. The results identified three failure modes—sagging deformation, wavelike deformation, and rupture—with sagging and rupture as the dominant modes. The coupling processes between the impact load and structural response for each mode were analyzed in detail. Based on these findings, a damage phase diagram was developed to illustrate the relationship between explosive mass, standoff distance, and damage modes, providing an intuitive representation of failure mechanisms. Additionally, dimensional analysis identified two key parameters—scaled distance and charge radius—that influence damage outcomes, with their relative influence weights quantified. This study provides critical insights into the failure mechanisms of ring-stiffened cylindrical shells under underwater explosions and offers valuable guidance for predicting damage and designing protective structures in engineering applications.
期刊介绍:
The International Journal of Impact Engineering, established in 1983 publishes original research findings related to the response of structures, components and materials subjected to impact, blast and high-rate loading. Areas relevant to the journal encompass the following general topics and those associated with them:
-Behaviour and failure of structures and materials under impact and blast loading
-Systems for protection and absorption of impact and blast loading
-Terminal ballistics
-Dynamic behaviour and failure of materials including plasticity and fracture
-Stress waves
-Structural crashworthiness
-High-rate mechanical and forming processes
-Impact, blast and high-rate loading/measurement techniques and their applications