New insights into the synergistic influence of voids and interphase characteristics on effective properties of unidirectional composites

Wang, Kui; Lü, Yue; Rao, Yanni; Wei, Ning; Ban, Jing; Peng, Yong; Song, Yong; Ahzi, Saı̈d

doi:10.1016/j.compstruct.2020.112862

Cited by 26 publications

(7 citation statements)

References 37 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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“…In the case of CNTs with aspect ratio k > 1, D eq can be determined as D eq = D cnt κ 1/3 . Finally, the term n(κ), denotes the sphericity of the CNTs and is defined as the ratio between the surface areas of the equivalent spheres and the particles, which reads [61]:…”

Section: Effective Elastic Moduli Using a Double-inclusion Modelmentioning

confidence: 99%

Micromechanics-based phase field fracture modelling of CNT composites

Quinteros¹,

García-Macías²,

Martínez-Pañeda³

2022

Preprint

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We present a novel micromechanics-based phase field approach to model crack initiation and propagation in carbon nanotube (CNT) based composites. The constitutive mechanical and fracture properties of the nanocomposites are first estimated by a mean-field homogenisation approach. Inhomogeneous dispersion of CNTs is accounted for by means of equivalent inclusions representing agglomerated CNTs. Detailed parametric analyses are presented to assess the effect of the main micromechanical properties upon the fracture behaviour of CNT-based composites. The second step of the proposed approach incorporates the previously estimated constitutive properties into a phase field fracture model to simulate crack initiation and growth in CNTbased composites. The modelling capabilities of the framework presented is demonstrated through three paradigmatic case studies involving mode I and mixed mode fracture conditions.

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“…The application of fiber-reinforced polymers (FRPs) is one of the key directions in automotive, shipbuilding, construction, aerospace, and other fields nowadays. FRP materials have the advantages of being lightweight, having a high strength, providing good insulation, corrosion resistant, being designable, and so on, providing innovative ideas for the selection of materials in various fields [ 1 , 2 , 3 ]. Currently, widely used FRP materials include carbon-fiber-reinforced plastics (CFRPs), glass-fiber-reinforced plastics (GFRPs), basalt-fiber-reinforced plastics (BFRPs), aramid-fiber-reinforced plastics (AFRPs), etc.…”

Section: Introductionmentioning

confidence: 99%

Durability of Two Epoxy Adhesive BFRP Joints Dipped in Seawater under High Temperature Environment

Niu,

Yang,

Liu

et al. 2023

Polymers

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Fiber-reinforced polymers (FRPs) have great potential in shipbuilding. As a new type of material, basalt-fiber-reinforced polymer (BFRP) has received increasing attention due to its good economic and environmental performance. In this paper, BFRP single-lap joints (SLJs) bonded by Araldite®2011 and Araldite®2014 were selected as sample objects, the joints, aged for 240 h, 480 h, and 720 h, were experimentally analyzed in 3.5% NaCl solution/5% NaCl solution at 80 °C. The sequential dual Fickian (SDF) model was used to fit the water absorption process of the dumbbell specimen material. By comparison, the water absorption of the material occurred mainly on the adhesive and the water absorption of Araldite®2011 was higher than that of Araldite®2014. The decrease in the Tg of the aged joint adhesive was characterized by DSC, and the TG test showed that the polymer material in the joint was degraded by the damp–heat effect. The quasi-static tensile test showed that the decrease in joint failure strength was positively correlated with the water content of the solution. The Araldite®2011 adhesive joint showed better mechanical properties and stability than the Araldite®2014 adhesive joint, while the secondary crosslinking of the bound water with the polymer chain resulted in a slight increase in the stiffness of the aged joint. From comprehensive observation of the macro-section and SEM-EDX images, it is concluded that the failure mode of the joint changes from fiber tearing to mixed failure of fiber tearing and adhesive layer cohesion, and the plasticizing effect of the epoxy resin in the adhesive and chemical corrosion of salt ions weakens the adhesive layer’s bond strength.

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New insights into the synergistic influence of voids and interphase characteristics on effective properties of unidirectional composites

Cited by 26 publications

References 37 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

Micromechanics-based phase field fracture modelling of CNT composites

Durability of Two Epoxy Adhesive BFRP Joints Dipped in Seawater under High Temperature Environment

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