厚径比对纤维增强复合材料壳体冲击响应的影响

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.2025.113279

L.M. Ferreira , C.A.C.P. Coelho , P.N.B. Reis

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引用次数: 0

摘要

本文采用三维有限元模型，分析了纤维增强复合材料壳体在低速冲击载荷作用下的厚度/半径比（t/R）对动力响应的影响。重点研究了t/R比对能量耗散和损伤模式的影响。对于厚壁壳体(t/R >；0.05)，峰值力和接触时间随着曲率的减小（即半径的增大）而增大，而最大位移则减小。另一方面，薄壁壳(t/R <；0.05)随着曲率的减小，峰值力更低，位移更大，接触时间更长。这一转变表明在50mm半径附近存在一个临界点（t/R = 0.05）。厚壁壳的能量耗散主要是层内损伤，其贡献随半径的增大而减小，而薄壁壳的能量吸收主要由摩擦和分层决定。在损伤传播模式上，厚壁壳表现为局部的层内和层间损伤，而薄壁壳表现为交叉状的层内损伤，分层更广泛。

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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Effect of thickness-to-radius ratio on the impact response of fabric-reinforced composite shells

This study analyses the effect of thickness-to-radius (t/R) ratio on the dynamic response of fabric-reinforced composite shells subjected to low-velocity impact loads using 3D finite element models validated by experimental results. Focus is given to the t/R ratio's influence on energy dissipation and damage modes. For thick-walled shells (t/R > 0.05) the peak force and contact time increases as the curvature decreases (i.e., with a larger radius), while the maximum displacement decreases. On the other hand, thin-walled shells (t/R < 0.05) exhibit lower peak forces, larger displacements, and longer contact times as the curvature decreases. This transition indicates the existence of a critical point around the radius of 50 mm (t/R = 0.05). The main mechanism for energy dissipation in thick-walled shells is intralaminar damage, and its contribution decreases with increasing radius, whereas for thin-walled shells, friction and delamination determine the absorption of impact energy. In terms of damage propagation patterns, thick-walled shells show localized intra- and interlaminar damage, while thin-walled shells evidence a cross-like intralaminar pattern with more extensive delamination.

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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.