Accelerated fatigue characterization of additively manufactured continuous carbon fiber reinforced thermoplastic: A thermodynamic approach

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-02-13 DOI:10.1016/j.compositesa.2025.108805

Mohammad Rouhi Moghanlou, Elaheh Azizian-Farsani, Ali Mahmoudi, Michael M Khonsari

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引用次数: 0

Abstract

A thermodynamic approach for accelerated fatigue characterization of additively manufactured continuous carbon fiber (CCF)-reinforced thermoplastics produced via fused filament fabrication (FFF) is presented. Specifically, we applied the concept of fracture fatigue entropy (FFE) to run-stop-cooldown (RSC) cyclic tests to efficiently predict fatigue life across both low- and high-cycle regions (10⁴ – 10⁷ cycles) while minimizing experimental workload. Results are presented for two fiber orientations: unidirectional (0°) and [0°/90°/±45°]_s specimens. Elastic properties are established via tensile tests, and RSC tests are performed to assess the cyclic plastic strain energy and its associated temperature variations via thermographic measurements, leading to fatigue limit prediction. Through extensive tension–tension fatigue test accounting for internal friction, the study revealed average FFE values of 3.10 MJ/m³K and 3.67 MJ/m³K for 0° and [0°/90°/±45°]_s specimens, respectively. These values are valid for low- and high-cycle fatigue regimes. A comparison between the experimental results and analytical predictions confirmed FFE’s capability for S-N curve prediction while highlighting the significant role of fiber orientation in cyclic response. Additionally, the steady-state temperature rise (ΔT_ss) was found to be significantly affected by fiber orientation, ranging from 0.3 °C in unidirectional to 14.6 °C in multidirectional specimens under the same applied load.

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.