Understanding the effect of hygroscopic cycling on the internal stress and stiffness of natural fibre biocomposites

Popineau, Victor; Célino, Amandine; Péron, Mael; Baley, Christophe; Duigou, Antoine Le

doi:10.1016/j.compositesa.2022.106995

Cited by 3 publications

(6 citation statements)

References 43 publications

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“…It was well known that CNFRCs were sensitive to the environment, and the performance of the CNFRCs changed in the environment of humidity, heat, and high temperature. 82,83 3D printed CNFRCs inevitably produced more micro-defects due to the smaller F I G U R E 4 (A) Shape-memory of continuous natural fiber reinforced composite (CNFRC) corrugated structure, 8 shapechanging of (B) CNFRC hinge-like structure, 29 and (C) leaf-inspired structure. 57 molding pressure in the printing process compared with traditional molding processes.…”

Section: Limitation and Future Outlookmentioning

confidence: 99%

“…The majority of existing studies concentrated on the mechanical properties of the CNFRCs under room temperature conditions, and the influence of the environment on the composites was rarely considered. It was well known that CNFRCs were sensitive to the environment, and the performance of the CNFRCs changed in the environment of humidity, heat, and high temperature 82,83 . 3D printed CNFRCs inevitably produced more micro‐defects due to the smaller molding pressure in the printing process compared with traditional molding processes 32,84 .…”

Section: Limitation and Future Outlookmentioning

confidence: 99%

See 1 more Smart Citation

3D printing continuous natural fiber reinforced polymer composites: A review

Cheng,

Peng,

Wang

et al. 2023

Polymers for Advanced Techs

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With the growing prominence of environmental conservation awareness, there has been a notable surge in the exploration of renewable materials, particularly in the realm of natural fiber reinforced polymer composites. This heightened focus is underscored by the recent advancements in additive manufacturing techniques dedicated to continuous natural fiber reinforced composites (CNFRCs), which have inherently opened unprecedented avenues for the holistic customization of CNFRCs with meticulously tailored properties. This work reviewed the advanced techniques for 3D printing CNFRCs and addressed their challenges and perspectives in the future. First, the 3D printing processes of CNFRCs were reviewed, and the use of reinforcement and matrix phases was classified in detail. Then, CNFRCs were discussed in terms of their mechanical performances and novel function of shape‐changing. Further, performance optimization and prediction methods of 3D printed CNFRCs were discussed. In conclusion, a perspective on future study opportunities of 3D printed CNFRCs was provided from design, manufacturing, prediction to application.

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Section: Limitation and Future Outlookmentioning

confidence: 99%

Section: Limitation and Future Outlookmentioning

confidence: 99%

3D printing continuous natural fiber reinforced polymer composites: A review

Cheng,

Peng,

Wang

et al. 2023

Polymers for Advanced Techs

View full text Add to dashboard Cite

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“…For instance, this technique was employed by Popineau et al. [ 12 ] A sightly different measuring technique consists in printing a curvature jig (scale) consisting in a long bar with known varying curvature. [ 66 ] The curvature of the specimens is then compared against the reference curvature on the jig.…”

Section: Measurement Of the Deformationmentioning

confidence: 99%

“…The simplest, yet rarely used one consists of taking the specimens out of their conditioning medium and measuring manually their curvatures by plotting their imprint shape on a piece of paper. For instance, this technique was employed by Popineau et al [12] A sightly different measuring technique consists in printing a curvature jig (scale) consisting in a long bar with known varying curvature. [66] The curvature of the specimens is then compared against the reference curvature on the jig.…”

Section: Measurement Of the Deformationmentioning

confidence: 99%

“…Consequently, studies related to combined humidity and temperature or only temperature, with related models, optimization techniques and actuation concepts are also considered in this study. Non-printed structures could be considered to describe new materials for 4D-printed applications, [11] new actuation measuring techniques [12] or if they bring potential improvement to the design of 4D-printed equivalent structures. [13] Figure 2 presents the evolution of the number of publications including the keyword "4D print*" in the title (from the Web of Science database on the 5th of September 2022 [14] ).…”

Section: Introduction 1scope Of the Studymentioning

confidence: 99%

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The Design of 4D‐Printed Hygromorphs: State‐of‐the‐Art and Future Challenges

Kergariou

Demoly

Perriman

et al. 2022

Adv Funct Materials

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In recent years, 4D printing has allowed the rapid development of new concepts of multifunctional/adaptive structures. The 4D printing technology makes it possible to generate new shapes and/or property-changing capabilities by combining smart materials, multiphysics stimuli, and additive manufacturing. Hygromorphs constitute a specific class of new smart materials where their properties and morphing capabilities are dependent on the surrounding humidity, which drives actuation. Although multiple efforts have been made to fabricate hygromorph demonstrators, a comprehensive design process to produce hygromorphs by multiple 4D printing techniques is not yet available. The broad aim of this review and concept paper is to i) highlight existing scientific and technology gaps in the field of 4D-printed hygromorphs, ii) identify tools existing in other research fields for filling those gaps, and iii) discuss a series of guidelines for tackling future challenges and opportunities to develop 4D-printed composite hygromorph materials and related manufacturing processes. Accordingly, this review describes the materials and additive manufacturing techniques used for hygromorph composite fabrication. Moreover, the relevant parameters that control actuation, the models selection and performance, the design methods and the actuation measurements for customized 4D-printed hygromorph materials, are discussed.

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Moisture Effects on Acoustic Emission Characteristics and Damage Mechanisms of Balsa Wood Core Composite Sandwich under 4-Point Bending

Wu,

Perrin,

Pastor

et al. 2024

Materials

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To contribute to the development of sustainable composites, this work investigates the effects of moisture on the key AE characteristics related to the damage mechanisms of a bio-based balsa wood core sandwich in 4-point bending tests, including cumulative counts, amplitude, peak frequency, and duration. Novel triple dog-bone balsa wood core sandwich specimens with different MC (moisture content) were studied by comparing microscopic observations and a proposed two-step clustering approach in AE analysis. Three MC states, i.e., dry, 50% MC, and 120% MC, are discussed. GFRP (glass-fiber-reinforced polymer) laminate skin damages were found to be predominant in most GFRP–balsa sandwich specimens, but balsa wood core damages play a more important role as MC increases. The degradation of the bending stiffness of the sandwich was proven to be faster in the first linear stage of the moisture absorption curve, while the decrease in bending strength was more pronounced at the MC saturation level. Finally, for all of the dry and wet sandwich specimens, peak frequency and duration were proven to be more helpful in identifying damages associated with the lighter bio-based balsa wood core, such as balsa core damages and skin/core debonding.

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Understanding the effect of hygroscopic cycling on the internal stress and stiffness of natural fibre biocomposites

Cited by 3 publications

References 43 publications

3D printing continuous natural fiber reinforced polymer composites: A review

3D printing continuous natural fiber reinforced polymer composites: A review

The Design of 4D‐Printed Hygromorphs: State‐of‐the‐Art and Future Challenges

Moisture Effects on Acoustic Emission Characteristics and Damage Mechanisms of Balsa Wood Core Composite Sandwich under 4-Point Bending

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