Experimental and numerical studies on the low-velocity impact response of orthogrid epoxy panels reinforced with short plant fibers

Hamamousse, K.; Sereir, Z.; Benzidane, R.; Gehring, Florian; Gomina, Moussa; Poilâne, Christophe

doi:10.1016/j.compstruct.2019.01.005

Cited by 16 publications

(4 citation statements)

References 25 publications

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“…Theoretical models have been proposed by current researchers to simulate and analyze the properties of plant fiber composites. These models include the Halpin–Tsai theory, Hirsch theory, Tsai–Wu theory, and modified Bowyer–Bader theory [ 26 ]. Although theoretical models are useful for simplifying the material design process, they cannot fully reflect the influence of various factors.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performances Analysis and Prediction of Short Plant Fiber-Reinforced PLA Composites

Mu,

Chen,

et al. 2023

Polymers

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Plant fiber-reinforced polylactic acid (PLA) exhibits excellent mechanical properties and environmental friendliness and, therefore, has a wide range of applications. This study investigated the mechanical properties of three short plant fiber-reinforced PLA composites (flax, jute, and ramie) using mechanical testing and material characterization techniques (SEM, FTIR, and DSC). Additionally, we propose a methodology for predicting the mechanical properties of high-content short plant fiber-reinforced composite materials. Results indicate that flax fibers provide the optimal reinforcement effect due to differences in fiber composition and microstructure. Surface pretreatment of the fibers using alkali and silane coupling agents increases the fiber–matrix interface contact area, improves interface performance, and effectively enhances the mechanical properties of the composite. The mechanical properties of the composites increase with increasing fiber content, reaching the highest value at 40%, which is 38.79% higher than pure PLA. However, further increases in content lead to fiber agglomeration and decreased composite properties. When the content is relatively low (10%), the mechanical properties are degraded because of internal defects in the material, which is 40.42% lower than pure PLA. Through Micro-CT technology, the fiber was reconstructed, and it was found that the fiber was distributed mainly along the direction of injection molding, and the twin-screw process changes the shape and length of the fiber. By introducing the fiber agglomeration factor function and correcting the Halpin-Tsai criterion, the mechanical properties of composite materials with different contents were successfully predicted. Considering the complex stress state of composite materials in actual service processes, a numerical simulation method was established based on transversely isotropic material using the finite element method combined with theoretical analysis. The mechanical properties of high-content short plant fiber-reinforced composite materials were successfully predicted, and the simulation results showed strong agreement with the experimental results.

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Section: Introductionmentioning

confidence: 99%

Mechanical Performances Analysis and Prediction of Short Plant Fiber-Reinforced PLA Composites

Mu,

Chen,

et al. 2023

Polymers

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“…[1][2][3] Interest in natural fiberreinforced polymer composites is growing annually and are used to reinforce plastics because of their key advantages, such as their environmental availability and biodegradability, cost-effectiveness, and low cost. 1,4,5 In Algeria, many natural fibers that constitute the key wealth in the country's nature can be valued in the domestic industry; quite a few papers talk about the use of these fibers as reinforcing agents in composites such as esparto, 6 date palm, 7 lygeum spartum. 8 More frequently, for the application of bio-sourced composite sheets, these fibers are combined with resins.…”

Section: Introductionmentioning

confidence: 99%

Characterization of low-velocity impact and post-impact damage of luffa mat composite using acoustic emission and digital image correlation

Grabi

Chellil

Habibi

et al. 2022

Journal of Composite Materials

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In this paper, low-velocity impact and compression after impact damage tolerance of composite reinforced with natural luffa mat were studied for the first time. The effect of impact energy and the influence of the damaged area on the residual mechanical properties under compression were investigated. Acoustic emission (AE), digital image correlation (DIC) and scanning electron microscopy (SEM) were used for the evolution of different damage modes and displacement fields. The findings of the experiments reveal that compression after impact tests of 1, 2, and 3J show a significant effect of the residual damage which decreases residual compressive strength by 12.61, 24.14, and 30.9%, respectively, compared to the unimpacted composite, but Young’s modulus was not significantly affected. Multivariable statistical analysis of the AE signals identified four classes of damage: matrix cracking, fiber-matrix debonding, delamination, and fiber failure. It also showed that the damage mode of unimpacted composites which presents the majority of the amplitude events of the AE signals is mainly due to fiber failure, by contrast, for impacted composites the damage mode is mainly due to fiber-matrix debonding. The AE results are convincing and they were confirmed by SEM images of the fractured faces of the specimens, which revealed the main causes of material failure during the compression after impact test. The DIC system monitored the effect of pre-existing damage under compressive loading and found that increasing impact energy increases the stress concentration around the impacted area and has a significant effect on residual crack development, much more in the loading direction.

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“…The results show that the impact characteristics of birds are different at different angles, and the number of stiffeners affects the bird impact performance. Hamamousse et al (2019) conducted experimental and numerical studies to analyze the low-velocity impact response of orthograde stiffened panels reinforced with short alfa fibers. The results show that the presence of a stiffener reduces the stress, which confirms that stiffeners limit the propagation of damage.…”

Section: Introductionmentioning

confidence: 99%

Bird-strike damage analysis of composite panels with different stiffeners

Yile

Zhou

Sun

2022

AEAT

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Purpose The purpose of this paper is to analyze the bird impact damage of fuselage composite stiffened structures by numerical method and to evaluate the damage and the bird impact resistance of different structures. Design/methodology/approach The deformation and damage of composite stiffened plates during bird impact are numerically analyzed by the explicit finite element software LS-DYNA. A comparative study on the numerical calculation results was conducted by using SPH (Smoothed Particle Hydrodynamics)-FEM (Finite Element Method) modeling and simulation. First, the I-shaped, T-shaped, straight stiffened plates and unstiffened plate were designed. Second, the accuracy of the bird model was verified and further used to evaluate bird strikes on composite stiffened plate. Third, the results of damage modes as well as displacements of the stiffened plates were compared. Findings The stiffeners can increase the local stiffness of the composite panel, which can effectively inhibit the bird’s movement along the impact direction. Adding stiffeners can change the panel matrix tension damage from global distribution to local distribution mode; however, the impact damage distribution and the ability to inhibit damage propagation can differ for different stiffened panels. Especially, the I-stiffened panel exhibits a better anti-bird strike performance. Originality/value The analysis of geometric parameters of structural components by numerical methods can reduce the cost of the design phase and has been widely used in aircraft design. The present study evaluated the bird impact damage of composite stiffened plates with different structures, which provides a guideline for selecting the stiffened plate structure in the fuselage skin.

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Experimental and numerical studies on the low-velocity impact response of orthogrid epoxy panels reinforced with short plant fibers

Cited by 16 publications

References 25 publications

Mechanical Performances Analysis and Prediction of Short Plant Fiber-Reinforced PLA Composites

Mechanical Performances Analysis and Prediction of Short Plant Fiber-Reinforced PLA Composites

Characterization of low-velocity impact and post-impact damage of luffa mat composite using acoustic emission and digital image correlation

Bird-strike damage analysis of composite panels with different stiffeners

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