The calculation and analysis of expansion-fracture process of metal cylindrical shells under inner explosive loading based on strain rate effect

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2024-11-22 DOI:10.1016/j.tws.2024.112748

Jinyi Du , Lei Guo , Jian Pan , Gang Wang , Chuanting Wang , Yuan He , Yong He

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引用次数: 0

Abstract

The analysis and prediction of expansion-fracture process are the core issues in blast warhead research. This study proposes a theoretical model to calculate the expansion-fracture process of the shells, and the theoretical model is verified and corrected through experimental data in literature, then the model accurately predict the fracture state which is difficult to directly observe. Based on that, this study provides a theoretical explanation for the Ivanov plastic peak from a new perspective. Furthermore, an empirical formula of the fracture time of shells is derived, which related to strain rate. Using the theoretical model in this study, a detailed parametric analysis is conducted to study the strain rate effect of shells. It is found that the appropriate strain rate range can efficiently drive the shell to expand, and the appropriate outer layer shell can efficiently enhance the power of multi-layer warheads. The combination of 45 steel with 2024 aluminium and Y-925 tungsten has good enhancement.

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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.