纤维增强取向对玛瑙/芳纶3D打印复合材料I、II、I/II混合模式断裂层间断裂韧性的影响

IF 5.6 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2025-09-18 DOI:10.1016/j.tafmec.2025.105248

Benjamín A. Moreno-Núñez , Gonzalo Pincheira-Orellana , Manuel Burelo , Carlos Rubio-González , Enrique Martínez-Franco , Jorge Pérez-Ampuero , Cecilia D. Treviño-Quintanilla

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引用次数: 0

摘要

3D打印复合材料（3DPCM）的断裂行为仍未得到充分研究，特别是用连续芳纶纤维增强的玛玛石基复合材料。本研究采用双悬臂梁（DCB）、端缺口弯曲（ENF）和混合模式弯曲（MMB）方法，评估了玛onyx /芳纶复合材料在I型、II型和混合I/II型载荷下的层间断裂韧性。分析了0°和90°两种芳纶纤维取向下裂纹的起裂和扩展。结果表明，芳纶纤维取向对裂纹扩展有显著影响。在模式一下，DCB0°和DCB90°试样的裂纹起裂韧性相似，分别为1.06kJ/m2和1.62kJ/m2。而90°试样的裂纹扩展不稳定。在模式II中，ENF0°试样的断裂韧性为5.36kJ/m2，高于ENF90°试样的3.72kJ/m2，说明了强化取向的影响。与模态I或模态II相比，混合模态测试所需的裂纹起裂能量更少，MMB0°为0.98kJ/m2， MMB90°为1.32kJ/m2，强调了3DPCM材料在实际应用中对拉伸-剪切组合载荷的敏感性。扫描电镜分析揭示了增材制造缺陷，如空洞、纤维断裂和界面粘附不良，归因于制造过程中的低压。这些缺陷降低了断裂韧性，导致过早失效。本研究为玛玛石/芳纶3DPCM有限的文献提供了有价值的数据，并强调了纤维取向、断裂方式和加工质量的影响。进一步的研究应侧重于优化混合模式测试和后处理技术，以提高3DPCM最终产品的性能和可靠性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

$Effect of fiber reinforcement orientation on the interlaminar fracture toughness in mode I, mode II, and mixed-mode I/II fracture of onyx/aramid 3D printed composites$

查看原文本刊更多论文

Effect of fiber reinforcement orientation on the interlaminar fracture toughness in mode I, mode II, and mixed-mode I/II fracture of onyx/aramid 3D printed composites

The fracture behavior of 3D printed composite materials (3DPCM) remains underexplored, particularly for Onyx-based composites reinforced with continuous Aramid fibers. This study evaluates the interlaminar fracture toughness of Onyx/Aramid composites under Mode I, Mode II, and Mixed-mode I/II loading using Double Cantilever Beam (DCB), End Notch Flexure (ENF), and Mixed-Mode Bending (MMB) methods. Crack initiation and propagation were analyzed for two aramid fiber orientations: 0° and 90°.

The results indicate that aramid fiber orientation significantly influences crack growth. Under Mode I, DCB0° and DCB90° samples exhibited similar crack initiation toughness,

1.06 kJ / m^{2}

and

1.62 kJ / m^{2}

, respectively. However, crack propagation was more unstable in 90° samples. In Mode II, ENF0° samples exhibited higher fracture toughness

(5.36 kJ / m^{2})

than ENF90°

(3.72 kJ / m^{2})

, demonstrating the effect of reinforcement alignment. Mixed-Mode tests require less energy for crack initiation,

0.98 kJ / m^{2}

for MMB0° and

1.32 kJ / m^{2}

for MMB90°, than Mode I or II, emphasizing the sensitivity of 3DPCM materials to combined tensile-shear loads found in real-world applications.

SEM analysis revealed additive manufacturing defects such as voids, fiber breakage, and poor interfacial adhesion, attributed to low pressure during fabrication. These defects lower fracture toughness and contribute to premature failure.

This research provides valuable data to the limited literature on Onyx/Aramid 3DPCM and emphasizes the influence of fiber orientation, fracture mode, and processing quality. Further research should focus on optimizing the mixed-mode testing and post-processing techniques that can improve the performance and reliability of final products made by 3DPCM.

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来源期刊

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.