A micromechanical model for effective hygro-thermo-elastic properties of fiber reinforced composites with functionally graded interphases

Rao, Yanni; He, Qi; Dai, H. L.

doi:10.1016/j.apm.2020.10.040

Cited by 20 publications

(4 citation statements)

References 43 publications

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“…Apart from the platelet aspect ratio, the platelet concentration is another important factor that affects the final properties of composites greatly. [39][40][41] Figure 6 shows the synergistic effect of platelet volume fraction and platelet aspect ratio on SPRCs' dynamic moduli. As expected, the storage modulus increases remarkably with the increase of platelet aspect ratio and its volume fraction simultaneously.…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2023

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Load‐bearing biological staggered composites, like nacre, teeth, and bone, possess an exceptional combination of material properties like high stiffness and high toughness. To date, most of the analytical research are for nacre‐like bio‐inspired staggered composites, with highly overlapped platelets. But the collagen fibril‐like staggered composites, with slender or barely overlapped platelets, are out of their scope. This motivates this work. In this paper, based on the previous research, according to the elastic‐viscoelastic corresponding principle, an analytical model for dynamic properties of general bio‐inspired staggered composites is presented. Moreover, the effect of loading frequency in a wide range is studied. The accuracy of the model is verified by comparison with existing models and finite element simulations. Besides, parametric analyses and sensitivity analysis are conducted thoroughly. The results reveal that besides the platelet concentration and the platelet aspect ratio, the platelet overlap ratio also influences the damping behavior of bio‐inspired staggered composites to a certain extent; for biological/biomimetic composites with a larger overlap ratio, higher loss modulus is possible to be achieved, and the optimal aspect ratio is mostly within [5, 30]. These findings are of great significance to the optimal design of bio‐inspired engineering materials in the future.

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Section: Resultsmentioning

confidence: 99%

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

et al. 2023

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“…For epoxy resin, 2.36 GPa and 0.33 were used as Young's modulus and Poisson's ratio, respectively. [26][27][28][29] The fiber volume fraction of the plain-woven fabric composites was selected as 0.4, which originated from references. 8,10,[30][31][32][33] The fiber volume fractions of woven fabric composites can vary according to the manufacturing processes and application field; however, we wanted to analyze the mechanical behavior with a certain representative fiber volume fraction to eliminate certain redundant case studies.…”

Section: Resultsmentioning

confidence: 99%

Structure optimization of woven fabric composites for improvement of mechanical properties using a micromechanics model of woven fabric composites and a genetic algorithm

Hwang

Kim

2021

Composites and Advanced Materials

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This research aims to optimize the mechanical properties of woven fabric composites, especially the elastic modulus. A micromechanics model of woven fabric composites was used to obtain the mechanical properties of the fiber composite, and a genetic algorithm (GA) was employed for the optimization tool. The structure of the fabric fiber was expressed using the width, thickness, and wave pattern of the fiber strands in the woven fabric composites. In the GA, the chromosome string consisted of the thickness and width of the fill and warp strands, and the objective function was determined to maximize the elastic modulus of the composite. Numerical analysis showed that the longitudinal mechanical properties of the strands contributed significantly to the overall elastic modulus of the composites because the longitudinal property was notably larger than the transverse property. Therefore, to improve the in-plane elastic modulus, the resulting geometry of the composites possessed large volumes of related strands with large cross-sectional areas and small strand waviness. However, the numerical results of the out-of-plane elastic modulus generated large strand waviness, which contributed to the fiber alignment in the out-of-plane direction. The findings of this research are expected to be an excellent resource for the structural design of woven fabric composites.

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“…For this purpose, it is assumed that the nonlinear temperature changes occur in the direction of the shell's thickness from T o on the outer surface to T i on the inner surface. Therefore, the relationship between thermal changes can be written as follows: 61,68 T T T z h…”

Section: Mathematical Simulationmentioning

confidence: 99%

Nonlinear Buckling Analysis of Cylindrical Nanoshells Conveying Nano-Fluid in Hygrothermal Environment

et al. 2023

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This study presents a mathematical model for investigating the critical buckling of circular cylindrical nanoshells containing static/dynamic nanofluids under the influence of different thermal fields that can also lead to the so-called hygrothermal field. To this end, classical Sanders theory of cylindrical plates and shells, which has been generalized utilizing the non-classical non-local theory, is used to derive the dynamic equations governing the nanofluid-nanostructure interaction (nano-FSI) problem. The resulting equations are written in dimensionless form and then analytically solved using Hamilton's principle approach. Herein, the applied heat and humidity fields are considered as three types of longitudinal, circumferential, and simultaneously longitudinal-circumferential forces fields. All of the above cases are examined separately for the two high-temperatures and room-temperatures modes. The results show a significant effect of nano-fluid passing through the nanostructure and its velocity and density rate on the critical buckling strain of the nano-system, especially at high-temperatures.

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A micromechanical model for effective hygro-thermo-elastic properties of fiber reinforced composites with functionally graded interphases

Cited by 20 publications

References 43 publications

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

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

Structure optimization of woven fabric composites for improvement of mechanical properties using a micromechanics model of woven fabric composites and a genetic algorithm

Nonlinear Buckling Analysis of Cylindrical Nanoshells Conveying Nano-Fluid in Hygrothermal Environment

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