Research on the influence of impact damage on force identification for composite material

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2024-09-21 DOI:10.1016/j.compstruct.2024.118595

Yuqing Qiu, Hongli Ji, Chongcong Tao, Jinhao Qiu

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引用次数: 0

Abstract

The invisible damage caused by low-velocity impacts are safety threats to engineering structures. Thus, impact force identification is crucial in the context of composite structures for both structure health monitoring (SHM) and composite structure design. This paper investigates the process of identifying impacts on composite structures subjected to low-velocity impact. Considering the damage evolution in the composite structure during impact, this paper explores the influence of impact damage on the accuracy of force identification. Impact experiments on carbon fiber reinforced polymer (CFRP) laminates were conducted to obtain impact force peaks and displacement responses. Furthermore, a validated finite element model (FEM) is established for more elaborate analysis on the mechanism. The findings reveal that the structural damage can lead to significant deviations in force identification if the damage is not considered. Finally, a neural network is employed to predict the force history taking impact damage into consideration. This research provides a reference for the composite structures design and health monitoring of engineering structures considering impact damage.

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研究冲击损伤对复合材料力识别的影响

低速撞击造成的隐形破坏是对工程结构的安全威胁。因此，冲击力识别对于复合材料结构的结构健康监测（SHM）和复合材料结构设计至关重要。本文研究了对受到低速冲击的复合材料结构进行冲击力识别的过程。考虑到冲击过程中复合结构的损伤演变，本文探讨了冲击损伤对力识别精度的影响。对碳纤维增强聚合物（CFRP）层压板进行了冲击实验，以获得冲击力峰值和位移响应。此外，还建立了一个经过验证的有限元模型（FEM），以便对其机理进行更详细的分析。研究结果表明，如果不考虑结构损伤，会导致力识别出现重大偏差。最后，在考虑冲击损伤的情况下，采用神经网络预测受力历史。这项研究为考虑冲击损伤的复合结构设计和工程结构健康监测提供了参考。

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.