Investigation of progressive damage behavior of uncured GLARE: An integrated study using in-situ acoustic emission and multi-scale simulation

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-27 DOI:10.1016/j.tws.2025.113222

Meng Zhang , Shenglun Zhang , Bing Hu , Dongdong Yan , Shichen Liu , Yao Wang , Yong Li

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引用次数: 0

Abstract

This study investigates the progressive damage evolution and formability of thin-walled structural material- uncured GLARE laminates under complex stress states through a combination of Nakajima tests, in-situ acoustic emission (AE), and multi-scale simulation techniques. A mutation phenomenon caused by internal fiber premature cracking was observed both in punch force and strain field evolution, which was substantiated by a pronounced surge in AE energy accumulation. A novel systematic multi-scale simulation framework, integrated macro-, meso‑, and micro-scale, was developed to analyze the wrinkling and cracking mechanism. Macro-scale analysis demonstrated that increasing specimen width induces a significant reduction in stress triaxiality from 0.67 to -0.73 at the edge regions of aluminum alloy layers, directly responsible for wrinkling defect initiation. In contrast, fabric shear angle variations remained below 5°, confirming their negligible contribution compared to triaxiality-driven defect. Subsequent meso‑scale simulations revealed polar fiber turns the compression-tension to the biaxial tension status with width increasing, while micro-scale analyses tracked progressive damage accumulation patterns. This work delivers a robust predictive methodology and practical guidelines for accurately forecasting deformation-induced defects, thereby facilitating more reliable process optimization and component design for uncured GLARE laminates.

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基于原位声发射和多尺度模拟的未固化眩光渐进损伤行为研究

本研究结合Nakajima试验、原位声发射（AE）和多尺度模拟技术，研究了复杂应力状态下薄壁结构材料-未固化的GLARE层压板的渐进损伤演变和成形性。在冲孔力和应变场演化中均观察到由纤维内部早裂引起的突变现象，声发射能量积累显著增加。提出了一种综合宏观、中观和微观尺度的系统多尺度模拟框架，用于分析起皱和开裂机理。宏观尺度分析表明，试样宽度的增加导致铝合金层边缘区域应力三轴性从0.67显著降低到-0.73，这是起皱缺陷产生的直接原因。相比之下，织物剪切角变化保持在5°以下，与三轴驱动缺陷相比，证实了它们的贡献可以忽略不计。随后的中尺度模拟显示，极性纤维随着宽度的增加将压缩张力转变为双轴张力状态，而微观尺度分析则追踪了渐进式损伤积累模式。这项工作为准确预测变形引起的缺陷提供了强大的预测方法和实用指南，从而为未固化的眩光层压板提供了更可靠的工艺优化和组件设计。

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.