Strong and Tough Bioinspired Additive-Manufactured Dual-Phase Mechanical Metamaterial Composites

Yin, Sha; Guo, Wei; Wang, Hui-Tian; Huang, Yao; Yang, Ruiheng; Hu, Zihan; Chen, Dianhao; Xu, Jun; Ritchie, Robert O.

doi:10.1016/j.jmps.2021.104341

Cited by 91 publications

(39 citation statements)

References 38 publications

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“…Unfortunately, a systematic, algorithmic search for the optimal designs of lattices can be prohibitively expensive ( 11 ), so historically, their designs have been driven by engineering ingenuity and intuition and further improved by iterative evolution with design approaches such as addition of beam members, controlled shell buckling, chemical effects, or hybrid structures ( 1 , 3 – 6 , 14 – 16 ). Although there have been successful designs based on intuition ( 1 , 4 – 6 , 9 , 14 , 15 , 17 , 18 ), intuition cannot be universally applied to other problems. Furthermore, there is no guarantee that a successful design found by intuition is the true global optimal solution, with the intuition merely showing the potential for improvement within the design space.…”

Section: Introductionmentioning

confidence: 99%

Strength through defects: A novel Bayesian approach for the optimization of architected materials

et al. 2021

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We use a previously unexplored Bayesian optimization framework, "evolutionary Monte Carlo sampling," to systematically design the arrangement of defects in an architected microlattice to maximize its strain energy density before undergoing catastrophic failure. Our algorithm searches a design space with billions of 4 × 4 × 5 3D lattices, yet it finds the global optimum with only 250 cost function evaluations. Our optimum has a normalized strain energy density 12,464 times greater than its commonly studied defect-free counterpart. Traditional optimization is inefficient for this microlattice because (i) the design space has discrete, qualitative parameter states as input variables, (ii) the cost function is computationally expensive, and (iii) the design space is large. Our proposed framework is useful for architected materials and for many optimization problems in science and elucidates how defects can enhance the mechanical performance of architected materials.

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Section: Introductionmentioning

confidence: 99%

Strength through defects: A novel Bayesian approach for the optimization of architected materials

et al. 2021

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“…By using the nature of their porous architecture, Lu et al proved that mechanical metamaterials exhibited excellent heat transfer property and could be used as heat exchanger [5]. Recently, a dual-phase lattice metamaterial was proposed and developed, whose designing space for strength and energy absorption capability expanded significantly by manipulating the patterning of each phase [6,7]. This study shed light on the further digital design of multifunctional mechanical metamaterials by incorporating function as the separate phase.…”

Section: Introductionmentioning

confidence: 90%

Safe energy-storage mechanical metamaterials via architecture design

You

Wang

et al. 2023

EPJ Appl. Metamat.

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Mechanical and functional properties of metamaterials could be simultaneously manipulated via their architectures. This study proposes multifunctional metamaterials possessing both load-bearing capacity and energy storage capability, comprising multi-phase lattice metamaterial and cylindrical battery cells. Defect phase are incorporated into the metamaterials, which are then printed with stainless steel powder. The printed metamaterials are assembled with battery cells and compressed. Experimental results revealed that the voids in the lattice metamaterials, could guide deformation mode away from the internal battery cell that postponed the emergence of battery short-circuit. Effects of void phase pattern and content are discussed by simulation. We found that the multifunctional system could absorb greater energy after defect phase incorporation, as designed with proper void phase pattern and content. Also, these findings are further validated for the system with six battery cells. This study demonstrated how to design an energy-storage metamaterials with enhanced mechanical properties and battery safety simultaneously. Also, defect engineering was helpful for battery protection and energy absorption of the multifunctional system.

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“…The sound absorption coefficients of the heterogeneous absorber are then calculated in a similar way using equation (13).…”

Section: Heterogeneous Configurationmentioning

confidence: 99%

“…The specific acoustic impedances are in turn presented in terms of their real (Re) and imaginary (Im) components. Equation (13) suggests that the maximum absorption (e.g., α = 1) is achieved when Re(Z) and Im(Z) are ideally 1 and 0, respectively. Physically speaking, the real part relates to the extent of energy dissipation in the structure whilst the imaginary part relates to the frequency at which this dissipation occurs.…”

Section: Broadband Sound Absorptionmentioning

confidence: 99%

“…For instance, the various types of microlattices include trusses based on the exoskeleton of sea sponge, [8] plate/shell-hybrids based on the cuttlefish backbone, [9] hollowtrusses based on the bamboo, [10] shell microlattices based on the butterfly wing microstructure, [11] and many more. [12][13][14] Examples of bioinspired composites include the multi-layered laminate based on the conch shell, [15] cellular microstructure, [16] Bouligand microstructure, [17] and brick-andmortar structures based on nacre [18] etc. These materials are well-versed with usually combinations of two or more of the following features: lightweight, high strength, high fracture toughness, and high energy absorption.…”

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confidence: 99%

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Multi‐Level Bioinspired Microlattice with Broadband Sound‐Absorption Capabilities and Deformation‐Tolerant Compressive Response

Zhao

et al. 2022

Adv Funct Materials

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Owing to the omnipresent noise and crash hazards, multifunctional sound‐absorbing, and deformation‐tolerant materials are highly sought‐after for practical engineering design. However, challenges lie with designing such a material. Herein, leveraging the inherent mechanical robustness of the biological cuttlebone, by introducing dissipative pores, a high‐strength microlattice is presented which is also sound‐absorbing. Its absorption bandwidth and deformation tolerance are further enhanced by introducing another level of bioinspiration, based on geometrical heterogeneities amongst the building cells. A high‐fidelity microstructure‐based model is developed to predict and optimize properties. Across a broad range of frequencies from 1000 to 6300 Hz, at a low thickness of 21 mm, the optimized microlattice displays a high experimentally measured average absorption coefficient of 0.735 with 68% of the points higher than 0.7. The absorption mechanism attributes to the resonating air frictional loss whilst its broadband characteristics attribute to the multiple resonance modes working in tandem. The heterogeneous architecture also enables the microlattice to deform with a deformation‐tolerant plateau behavior not observed in its uniform counterpart, which thereby leads to a 30% improvement in the specific energy absorption. Overall, this work presents an effective approach to the design of sound and energy‐absorbing materials by modifying state‐of‐the‐art bioinspired structures.

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Strong and Tough Bioinspired Additive-Manufactured Dual-Phase Mechanical Metamaterial Composites

Cited by 91 publications

References 38 publications

Strength through defects: A novel Bayesian approach for the optimization of architected materials

Strength through defects: A novel Bayesian approach for the optimization of architected materials

Safe energy-storage mechanical metamaterials via architecture design

Multi‐Level Bioinspired Microlattice with Broadband Sound‐Absorption Capabilities and Deformation‐Tolerant Compressive Response

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