A novel prediction method for pressure vessel dome profiles based on "shortest path"

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-07 DOI:10.1016/j.tws.2025.113180

Shaojing Dong , Kai Li , Yudong Pan , Ziyi Li , Xichen Wang , Shuo Zhang , Xiuli Shen

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引用次数: 0

Abstract

As the characteristic coefficients of carbon fiber composite pressure vessels improve, the design requires more precise finite element models. However, the varying thickness profiles of the dome caused by fiber stacking and changes in winding angle pose significant challenges. To predict the dome profile more accurately, this paper developed a three-dimensional prediction method that did not require piecewise solving. The yarn was discretized, and its centerline was computed using the geodesic equation. Discrete points in the width direction were expanded outward according to the "shortest path" principle, forming its three-dimensional winding shape. The profile of the next layer was calculated using the arcs formed by the intersection of the yarn boundary and the parallel circles on the dome. The predicted outermost profile was then compared with the CT scan results. Based on this method and the cubic spline method, finite element models were established respectively, and progressive damage analysis was conducted. Hydraulic burst tests of the pressure vessel were performed. The results indicate that the predicted shape of the yarn shows a maximum deviation of approximately 2 mm from the actual measurements at the polar hole. The maximum relative error of the thickness predicted is -14.3%. The average strength from the three hydrostatic burst tests was 40.4 ± 0.6 MPa. The relative error of the simulation result based on the proposed method was -1.9%, marking a 5.5% improvement in accuracy over the cubic spline method. The proposed method can provide valuable insight for accurate modeling of pressure vessels.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

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.