Combination of stiffness, strength, and toughness in 3D printed interlocking nacre-like composites

Liu, Fan; Li, Tiantian; Jia, Zian; Wang, Lifeng

doi:10.1016/j.eml.2019.100621

Cited by 60 publications

(26 citation statements)

References 39 publications

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“…Among all composites, composite N8W20 has the highest strength (6.2 MPa) and toughness (562.8 KJ/m 3 ), which are 191.3% and 811.0% higher than that of composite N8W00. Interestingly, the increase in toughness of our nacre-like composite is obviously higher than that of other reported nacre-like composites [15][16][17][18][19]21]. Although the strength of composite N8W30 is slightly lower than that of composite N8W20, there is a sharp drop in the toughness of composite N8W30 compared with composite N8W20 due to smaller failure strain.…”

Section: Influence Of Tablet Waviness On Mechanical Behaviorcontrasting

confidence: 57%

“…Compared with nacre-like composites with flat tablet, the strength, stiffness and toughness of the nacre-like composite with tablet of wave surface (N8W20) increase by up to 191.3%, 46.6% and 811.0%, respectively. This unusual combination of mechanical properties is an exciting result, especially the improved toughness achieved by the wave microstructure design, which is higher than that of the interlocking tablet design of the mineral bridge design [15][16][17][18]21]. Through an approach that integrates finite element simulations and experiments, we systematically investigated the influences of the tablet waviness and wave number on mechanical performance of the composites.…”

Section: Discussionmentioning

confidence: 99%

“…Many researchers have studied the effects of structure details on the mechanical performance of the composites inspired by nacre. Ghimire A et al have designed nacre-like composites with interlocked tablets and analyzed the effects of waviness on mechanical properties of nacreous composites; results showed that increasing the tablet waviness can improve the stiffness, strength and toughness of the nacre-like composites [15][16][17][18]. Mirzaeifar et al demonstrated that the existence of a hierarchical architecture in the designing of brick-and-mortar-like structures leads to superior defect-tolerant and structural properties [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Bio-Inspired Structure Based on Nacre and Woodpecker Beak for Enhanced Mechanical Performance

et al. 2021

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Materials with high strength and toughness have always been pursued by academic and industrial communities. This work presented a novel hybrid brick-and-mortar-like structure by introducing the wavy structure of the woodpecker beak for enhanced mechanical performance. The effects of tablet waviness and tablet wave number on the mechanical performance of the bio-inspired composites were analyzed. Compared with nacre-like composites with a flat tablet, the strength, stiffness and toughness of the novel hybrid nacre-like composite with tablet wave surface increased by up to 191.3%, 46.6% and 811.0%, respectively. The novel failure mode combining soft phase failure and tablet fracture revealed the key to the high toughness of composites. Finite element simulations were conducted to further explore the deformation and stress distribution of the hybrid brick-and-mortar-like structure. It showed that the hybrid brick-and-mortar-like structure can achieve a much better load transfer, which leads to greater tensile deformation in tablet before fracture, thus improving strength and energy absorption. These investigations have implications in the design of composites with high mechanical performance for aerospace, automobile and other manufacturing industries.

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Section: Influence Of Tablet Waviness On Mechanical Behaviorcontrasting

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hybrid Bio-Inspired Structure Based on Nacre and Woodpecker Beak for Enhanced Mechanical Performance

et al. 2021

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“…By duplicating the interlocking feature of platelets, bionic interlocking materials with better performance can be obtained through advanced technology [21,29,30]. For instance, Liu et al [29] conducted tensile tests and single edge notched bend fracture tests on 3D printed nacre-like composites samples with interlocking and non-interlocking and revealed the effect of aspect ratio, volume fraction and interlocking angle on the mechanical properties. Compared with non-interlocking composite materials, its hardness, strength and toughness are increased by 55%, 143% and 176%, respectively.…”

Section: Introductionmentioning

confidence: 99%

A mechanical model of the crack-bridging effect in nacre with interlocking interface

Huang

2021

Arch Appl Mech

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The excellent mechanical properties of nacre have attracted the research interest of countless scholars and inspired the optimal design of novel nacre-like materials. In recent years, studies have found that the interface between the mineral platelet and the organic layer of nacre has an uneven micro-topological structure, which has an interlocking effect during the deformation process, and plays a vital role in the mechanical response of nacre. The interlocking structure can increase the sliding resistance of the platelets to increase the fracture toughness. Based on this mechanism, we adapted a crack-bridging model to elucidate the influence of the interlocking angle on the fracture toughness and crack-bridging toughening effect of nacre. The critical interlocking angle and fracture toughness calculated by this model are consistent with the observed and actual experimental results in nacre. This model is of great significance for guiding the interface interlocking design of novel nacre-like materials.

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“…Raj et al [17] used FEM to predict the toughness of a highly organized hierarchical structure of nacre consisting of calcium carbonate tablets bonded by an organic matrix with the work being in good agreement with experimental measurements. Li et al [18] also made use of FEM to compare the predicted stiffness and strength of nacre-like tablets and compared them to experimentally produced specimens using an additive manufacturing method.…”

Section: Introductionmentioning

confidence: 99%

Modelling and Experimental Investigation of Hexagonal Nacre-Like Structure Stiffness

Rouhana

Stommel

2020

J. Compos. Sci.

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A highly ordered, hexagonal, nacre-like composite stiffness is investigated using experiments, simulations, and analytical models. Polystyrene and polyurethane are selected as materials for the manufactured specimens using laser cutting and hand lamination. A simulation geometry is made by digital microscope measurements of the specimens, and a simulation is conducted using material data based on component material characterization. Available analytical models are compared to the experimental results, and a more accurate model is derived specifically for highly ordered hexagonal tablets with relatively large in-plane gaps. The influence of hexagonal width, cut width, and interface thickness are analyzed using the hexagonal nacre-like composite stiffness model. The proposed analytical model converges within 1% with the simulation and experimental results.

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Combination of stiffness, strength, and toughness in 3D printed interlocking nacre-like composites

Cited by 60 publications

References 39 publications

Hybrid Bio-Inspired Structure Based on Nacre and Woodpecker Beak for Enhanced Mechanical Performance

Hybrid Bio-Inspired Structure Based on Nacre and Woodpecker Beak for Enhanced Mechanical Performance

A mechanical model of the crack-bridging effect in nacre with interlocking interface

Modelling and Experimental Investigation of Hexagonal Nacre-Like Structure Stiffness

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