Dynamic response and energy transfer of polyurea-coated capsule-shaped liquid storage containers under blast loads

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-07 DOI:10.1016/j.tws.2025.113275

Yanghao Cao, Chong Ji, Yuting Wang, Xin Wang, Gang Wu, Haojie Zhu, Changxiao Zhao

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引用次数: 0

Abstract

Experimental investigations and numerical simulations were conducted to examine the damage response characteristics of polyurea-coated 6063-T5 aluminum-alloy capsule-shaped containers with various liquid-filling rates (50%, 75%, 100%) under close-range blast loads. Experimental results demonstrated that the application of a polyurea coating to the containers reduced the diameter of the damage zone, mitigated container collapse, and decreased the failure severity compared to the cases where no coating was applied. The protective efficacy of polyurea was most pronounced at a 75% liquid-filling rate.

Numerical simulations revealed that polyurea reduced the container damage through its hyperelastic properties, inhibiting crack propagation and absorbing energy through softening effects during high-temperature, high-pressure detonation product impact. The coating decreased the collapse velocity at the blast-facing nodes and reduced the container concavity. The internal energy reduction in polyurea-coated containers reached 4.6%, 24.1%, and 8.4% for filling rates of 50%, 75%, and 100%, respectively. The protective mechanism of polyurea occurred in three phases: first, it absorbed explosion-generated energy; second, it dispersed stress at the blast-facing surface while distributing localized damage throughout the structure; and third, it partially absorbed the energy transmitted from the liquid to the container, thereby reducing secondary damage caused by the liquid impact pressure.

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冲击波荷载作用下聚氨酯包覆胶囊状储液容器的动态响应和能量传递

通过实验研究和数值模拟，研究了不同充液率（50%、75%、100%）下6063-T5铝合金聚氨酯包覆胶囊型容器在近距离爆炸载荷作用下的损伤响应特性。实验结果表明，与未涂覆聚脲涂层的情况相比，涂覆聚脲涂层可以减小容器损伤区直径，减轻容器坍塌，降低破坏严重程度。聚脲的保护效果在充液率为75%时最为显著。数值模拟结果表明，在高温高压爆轰产物冲击过程中，聚脲通过其超弹性特性、抑制裂纹扩展和通过软化效应吸收能量来减少容器损伤。涂层降低了面向爆破节点的坍塌速度，降低了容器的凹度。在填充率为50%、75%和100%时，聚氨酯涂层容器的内部能量降低分别达到4.6%、24.1%和8.4%。聚脲的保护机制发生在三个阶段：一是吸收爆炸产生的能量；其次，它分散了面向爆破面的应力，同时在整个结构中分布了局部损伤；第三，它部分吸收了液体向容器传递的能量，从而减少了液体冲击压力造成的二次损伤。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.