Characterization of impact damage patterns in composite aerospace structures using augmented thermal signal reconstruction

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2025-09-19 DOI:10.1016/j.compstruct.2025.119651

Mark Smeets , Francesco Lanza di Scalea , Margherita Capriotti

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引用次数: 0

Abstract

Barely visible impact damage in composite materials threatens the safety and durability of composite structures. Due to its low visibility and complexity, the quantitative characterization of the damage mechanisms involved is very critical. This is particularly challenging in composite aerospace structures, where multiple components are assembled and concurrent interactive failure mechanisms due to impact involve different structural elements. In this paper, pulsed infrared thermography was applied on a skin-to-stringer carbon fiber reinforced polymer panel, subjected to impacts. New 2nd time derivative features and a time augmented version of the Thermal Signal Reconstruction (TSR) technique are proposed to characterize realistic matrix cracking and delamination damage, leveraging the cooling dynamics of pulsed thermography. Five unique damage patterns, ranging from 20 mm to 100 mm in length and distributed throughout the panel thickness and components, are identified. Type, size, and depth of the damage patterns are quantified and compared to independently mapped damage. Current destructive and non-destructive techniques have limitations in preserving the damage and specimen states and in providing rapid assessment, respectively. The proposed experimental method enables to identify post-mortem and characterize the evolution of impact damage mechanisms non-invasively for the assessment of impact damage progression in large composite assemblies.

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利用增强热信号重建表征复合材料航天结构的冲击损伤模式

复合材料的冲击损伤对复合材料结构的安全性和耐久性构成威胁。由于其低可见性和复杂性，所涉及的损伤机制的定量表征是非常关键的。这在复合材料航空结构中尤其具有挑战性，因为复合材料航空结构中需要组装多个部件，并且由于冲击而同时发生的交互失效机制涉及不同的结构元件。在本文中，脉冲红外热成像应用于皮肤到弦碳纤维增强聚合物板，受到冲击。利用脉冲热成像的冷却动力学，提出了新的二阶导数特征和时间增强版的热信号重构（TSR）技术来表征真实的基体开裂和分层损伤。确定了五种独特的损伤模式，长度从20毫米到100毫米不等，分布在整个面板厚度和组件中。损伤模式的类型、大小和深度被量化，并与独立绘制的损伤进行比较。目前的破坏性和非破坏性技术分别在保存损伤和标本状态以及提供快速评估方面存在局限性。所提出的实验方法能够非侵入性地识别死后冲击损伤机制的演变特征，用于评估大型复合材料组件的冲击损伤进展。

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

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.