{"title":"Implosion collapse of externally pressurized steel/CFRP/titanium cylindrical shells with a hybrid sandwich thin-walled structure","authors":"Xinlong Zuo , Jinwei Yu , Wenxian Tang , Yongsheng Li","doi":"10.1016/j.tws.2025.112988","DOIUrl":null,"url":null,"abstract":"<div><div>A steel/CFRP/titanium cylindrical shell with a hybrid sandwich structure was proposed, designed, fabricated and hydrostatically experimented. Subsequently, to evaluate the collapse load of such hybrid sandwich structure under external pressure without excessive computational cost, an analytical formula was derived in this study. The rationality of the derived formula was verified by the comparison with experimental and numerical investigations. The hybrid sandwich structure comprised an inner steel metallic layer, a CFRP core layer, and an outer titanium foil metallic skin layer. To determine the contribution of the sandwich structure to the loading capacity, this study compared the loading capacity of the hybrid sandwich shells with that of single-layer steel cylindrical shells. Three nominally identical multilayer cylindrical shells with a sandwich structure and three nominally identical single-layer cylindrical shells were fabricated. The dimensions of these shells were measured, and the shells were subjected to hydrostatic testing. Moreover, theoretical and numerical analyses were performed to evaluate the collapse properties of the fabricated shells. The experimental, theoretical, and numerical data of this study agreed with each other and suggested that the loading capacity of the multilayer shell samples was considerably higher than that of the single-layer shell samples. Additionally, the structural efficiency of the hybrid sandwich shell samples was approximately 141.9 % higher than that of the single-layer samples.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"210 ","pages":"Article 112988"},"PeriodicalIF":5.7000,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thin-Walled Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0263823125000825","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
引用次数: 0
Abstract
A steel/CFRP/titanium cylindrical shell with a hybrid sandwich structure was proposed, designed, fabricated and hydrostatically experimented. Subsequently, to evaluate the collapse load of such hybrid sandwich structure under external pressure without excessive computational cost, an analytical formula was derived in this study. The rationality of the derived formula was verified by the comparison with experimental and numerical investigations. The hybrid sandwich structure comprised an inner steel metallic layer, a CFRP core layer, and an outer titanium foil metallic skin layer. To determine the contribution of the sandwich structure to the loading capacity, this study compared the loading capacity of the hybrid sandwich shells with that of single-layer steel cylindrical shells. Three nominally identical multilayer cylindrical shells with a sandwich structure and three nominally identical single-layer cylindrical shells were fabricated. The dimensions of these shells were measured, and the shells were subjected to hydrostatic testing. Moreover, theoretical and numerical analyses were performed to evaluate the collapse properties of the fabricated shells. The experimental, theoretical, and numerical data of this study agreed with each other and suggested that the loading capacity of the multilayer shell samples was considerably higher than that of the single-layer shell samples. Additionally, the structural efficiency of the hybrid sandwich shell samples was approximately 141.9 % higher than that of the single-layer samples.
期刊介绍：
Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses.
Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering.
The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.
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