Frequency‐dependent dynamic moduli prediction for general bio‐inspired staggered platelet reinforced composites

Rao, Yanni; Wan, Wei; Wei, Ning; Wang, Kui

doi:10.1002/pc.27318

Cited by 3 publications

(1 citation statement)

References 47 publications

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“…Biological structures that have evolved for survival exhibit remarkable adaptability to their environment 1–3 . Among these structures, hybrid biological systems consisting of both soft and hard components offer valuable insights for designing materials and structures that reconcile conflicting mechanical properties 4,5 .…”

Section: Introductionmentioning

confidence: 99%

Effects of process parameters on mechanical properties and interface of 3D printed bamboo‐inspired CCFR‐PLA/TPU composites

Ye,

Dou,

Zhang

et al. 2023

Polymer Composites

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Inspired by the exceptional strength and toughness of fresh bamboo, a low‐cost method for preparing continuous fiber‐reinforced multi‐matrix composites based on 3D printing was proposed in this paper. Through the design of a special extrusion nozzle, the controllable feed of polylactic‐acid (PLA) and thermoplastic polyurethane (TPU) filaments was achieved, allowing for the preparation of continuous carbon fiber reinforced PLA/TPU composites. The effects of various process parameters on the tensile and flexural properties of the CCFR‐PLA/TPU composites were investigated. Additionally, the relationship between process parameters and the formation of the matrix‐fiber interface and PLA‐TPU interface was analyzed. The results show that layer height has the greatest influence on mechanical properties, while the printing speed has the least influence. The mechanical properties of the CCFR‐PLA/TPU composites and the unreinforced blend matrix, prepared using the optimal combination of process parameters, were tested. The results demonstrated that the tensile strength and flexural strength of the CCFR‐PLA/TPU composites increased by 16.95 and 1.80 times, respectively, compared to the unreinforced blend matrix. Further, inspired by the overall structure of bamboo, a stiffness gradient CCFR composite material was designed and prepared. The methodology employed in this study holds significant implications for the advancement of novel multi‐matrix hybrid continuous fiber reinforced composites, particularly in aerospace and related industries.Highlights Multi‐matrix continuous fiber reinforced composites were prepared by 3D printing inspired by fresh bamboo. The effects of process parameters (nozzle temperature, printing speed, extrusion width, layer height) on mechanical properties were investigated. The optimal printing parameter combination was determined by range analysis. Stiffness gradient composites were prepared inspired by the overall structure of bamboo.

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Section: Introductionmentioning

confidence: 99%

Effects of process parameters on mechanical properties and interface of 3D printed bamboo‐inspired CCFR‐PLA/TPU composites

Ye,

Dou,

Zhang

et al. 2023

Polymer Composites

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Global sensitivity analysis of complex moduli of carbon fiber reinforced polymer

et al. 2023

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Global sensitivity analysis of complex moduli of carbon fiber reinforced polymer (CFRP) is performed by using variance‐based sensitivity analysis. Twelve material properties of matrix and fiber are selected as input arguments, including fiber volume fraction, three matrix properties, and eight carbon fiber properties. Ten thousand samples are generated with Sobol sequence. Based on the correspondence principle, six complex moduli of unidirectional CFRP, and two complex moduli of quasi‐isotropic laminate, orthogonal laminate, and symmetric laminate with different fiber angles are predicted using the generalized method of cells and classical laminate theory. The sensitivity indexes of all input arguments are calculated. The results show that the loss factors of CFRP are mainly affected by the matrix loss factor and fiber axial loss factor, and slightly affected by the fiber transverse loss factor.Highlights Sensitivity analysis reveals key factors influencing CFRP complex moduli. Impact of fiber and matrix properties on CFRP damping revealed. Insights for high‐damping and high‐stiffness CFRP development. Enhanced understanding of energy absorption mechanisms. Uncovering the dominant role of matrix and fiber axial properties in damping.

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An analytical study on low velocity impact resistance behaviors of general bio‐inspired helicoidal composite plates

Rao,

Xiong,

Yao

et al. 2024

Polymer Composites

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Through evolutionary processes, helicoidal structures have been proven to exhibit exceptional load‐carrying capacity and impact resistance performance. To date, extensive experimental and numerical studies have been carried out on their impact behaviors, while few relevant analytical studies have been reported even though it is urgently needed for the preliminary assessment of structure design and optimization. In this work, based on the first shear deformation theory (FSDT) and the improved linearized Hertzian contact method, an analytical model for low velocity impact (LVI) performances of helicoidal laminates with arbitrary layups is developed. Therein, the post‐impact damage is taken into account according to continuum damage mechanics (CDM). Comparisons of load‐carrying capacity and energy‐absorbed performance between the proposed model prediction and the existing experimental data\numerical results have been made for verification. Besides, LVI behaviors of conventional laminates with unidirectional distribution andcross‐ply arrangement are discussed. Moreover, the role of rotation angle, impact velocity and the plate dimension on helicoidal laminates' LVI performances are analyzed quantitatively. There is evidence that helical layouts are better able to absorb energy and delay the in‐plane damage.Highlights The LVI responses of bio‐inspired single‐helicoidal (SH) and double‐helicoidal (DH) composite laminate are studied. An effective model to predict the LVI responses considered the post‐impact damage is developed. A comparison of the LVI performance of single‐helicoidal structures with various lay‐up schemes is carried out. DH structure has better low velocity impact resistance than SH structure when the rotation angle shares the same.

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Frequency‐dependent dynamic moduli prediction for general bio‐inspired staggered platelet reinforced composites

Cited by 3 publications

References 47 publications

Effects of process parameters on mechanical properties and interface of 3D printed bamboo‐inspired CCFR‐PLA/TPU composites

Effects of process parameters on mechanical properties and interface of 3D printed bamboo‐inspired CCFR‐PLA/TPU composites

Global sensitivity analysis of complex moduli of carbon fiber reinforced polymer

An analytical study on low velocity impact resistance behaviors of general bio‐inspired helicoidal composite plates

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