Numerical investigation on the dynamic behavior of thermoplastic fiber-metal laminates subject to confined explosion loading

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-22 DOI:10.1016/j.tws.2025.113354

Xiangshao Kong , Zihan Zhu , Cheng Zheng , Hu Zhou , Weiguo Wu

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引用次数: 0

Abstract

A numerical simulation study was conducted to investigate the dynamic response and failure behavior of thermoplastic fiber-metal laminates (TFMLs) under confined explosion conditions. To simulate the response of TFMLs to high-impact loads, a subroutine was developed incorporating the strain rate effect. In addition, a surrogate model for predicting the dynamic response of TFMLs was established by employing parametric modeling combined with Gaussian process regression analysis. Bayesian optimization of the thickness ratios for each layer group of the laminates was performed, using lightweight and protective performance as the comprehensive evaluation indices. The results indicate that incorporating the strain rate effect facilitates reliable characterization of both overall deformation and internal damage of TFMLs. The deviation of peak deflection between the numerically calculated value and experimental results is approximately 3 %, while the error for residual deflection is <10 %. A comparative analysis shows that the strain rate effect has significant influence both on the overall deformation and internal fiber damage of the blast loaded TFMLs. Furthermore, optimizing the thickness of each stack achieved an 11.9 % reduction in areal density and a 1.6 % reduction in residual deflection compared to those of the original design scheme. Increasing the metal thickness ratios on the front and rear faces of the laminated structure was shown to significantly enhance its protective performance. This research will contribute to advancing methodologies for analyzing the dynamic response and optimizing the structural design of TFMLs.

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热塑性纤维-金属层合板在受限爆炸载荷作用下动力特性的数值研究

对热塑性金属纤维层合板在密闭爆炸条件下的动态响应和破坏行为进行了数值模拟研究。为了模拟tfml对高冲击载荷的响应，开发了包含应变率效应的子程序。此外，采用参数化建模与高斯过程回归分析相结合的方法，建立了预测tfml动态响应的代理模型。以轻量化和防护性能为综合评价指标，对复合材料各层组的厚度比进行贝叶斯优化。结果表明，纳入应变率效应有助于可靠地表征tfml的整体变形和内部损伤。峰值挠度的数值计算值与实验结果的偏差约为3%，残余挠度的误差约为10%。对比分析表明，应变率效应对爆炸加载tfml的整体变形和纤维内部损伤均有显著影响。此外，与原始设计方案相比，优化每个堆栈的厚度可使面密度降低11.9%，残余挠度降低1.6%。增加复合材料前后面的金属厚度比可以显著提高复合材料的防护性能。本文的研究将有助于推进结构动力响应分析和结构优化设计的方法。

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.