A comparative analysis of quasi-static indentation and low-velocity impact on the free edges of CFRP composite laminates

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY Composites Part B: Engineering Pub Date : 2025-03-13 DOI:10.1016/j.compositesb.2025.112395

Nian Li , Jian Du , Rui Liu , Hsiao Mun Lee , Heow Pueh Lee

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Abstract

A comparative study was conducted to evaluate the feasibility of using quasi-static indentation for characterizing the dynamic behavior of CFRP laminated composites subjected to free edge-on impact, focusing on both damage resistance and tolerance. Inspection methods, including ultrasonic C-scanning, 3D X-ray CT reconstruction, in-situ DIC measurement, etc., were utilized to examine damage status and mechanical responses induced by quasi-static edge-on indentation, dynamic edge-on impact and subsequent compression. The analysis revealed comparable failure mechanisms underlying the quasi-static and dynamic testing: wedge-shaped debris and bending fracture of the sub-laminates. In compression, local buckling of sub-laminates caused delamination propagation, ultimately resulting in structural collapse due to fiber fracture. Quasi-static testing provided a good approximation of dynamic edge-on force-displacement behavior without force signal oscillations. A compressive strength reduction of approximately 30 %, for barely visible impact damage (BVID) induced by edge-on loading, emphasized the significance of edge-on impact damage tolerance, where the more accessible quasi-static method could be employed.

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准静态压痕和低速冲击对 CFRP 复合材料层压板自由边缘的影响对比分析

采用准静态压痕法对CFRP层合复合材料在自由冲击下的动态特性进行了对比研究，重点考察了其抗损伤性和容差性。采用超声c扫描、三维x射线CT重建、原位DIC测量等检测方法，检测准静态边对压痕、动态边对冲击及后续压缩引起的损伤状态及力学响应。分析揭示了准静态和动态试验的类似破坏机制：楔形碎片和亚层压板的弯曲断裂。在压缩过程中，次层合板的局部屈曲导致分层扩展，最终由于纤维断裂导致结构崩溃。准静态测试提供了无力信号振荡的动态边对力-位移行为的良好近似。对于边缘加载引起的几乎不可见的冲击损伤（BVID），抗压强度降低了约30%，这强调了边缘冲击损伤容限的重要性，在这种情况下，更容易采用准静态方法。

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.