Interpenetrating Lattices with Tailorable Energy Absorption in Tension

Taylor, Spencer V.; Moustafa, Abdel R.; Cordero, Zachary C.

doi:10.1016/j.actamat.2021.117115

Cited by 9 publications

(7 citation statements)

References 29 publications

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“…42 This idea has also recently been adopted by the metamaterials community with nomenclature adopted from crystallography as well as classical geometry. 43 The concept of dual or interpenetrating lattices is thus the latest adaptation of classical ideas in crystallography to invent new metamaterial topologies although previous work 27,28 in such interpenetrating lattices has focussed on disconnected phases. While the concept is simple, the explosion of additive manufacturing technologies has opened routes to manufacture such materials and capitalise on the design freedom to achieve unique properties.…”

Section: Discussionmentioning

confidence: 99%

“…14 This is a holy grail in structural metamaterials that has remained elusive primarily due to the inverse relationship between strength and toughness that is ubiquitous in most classes of materials, but not due to a theoretical requirement. The idea of using multi-material lattices [27][28][29] to obtain synergistic mechanical properties is gaining traction with interpenetrating lattices being the most important class of these multi-material systems.…”

Section: Impact Articlementioning

confidence: 99%

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The coupled strength and toughness of interconnected and interpenetrating multi-material gyroids

Indurkar

Shaikeea

et al. 2022

MRS Bulletin

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The growth of additive manufacturing technologies has spurred interest in examining multi-material micro-architected materials for filling the so-called white spaces in the Ashby strength versus toughness plots. We investigate this problem using interconnected and interpenetrating double gyroids comprising ductile and brittle phases as an exemplar. Both strength and toughness at the initiation of crack growth are shown to vary non-monotonically with the volume fraction of the two phases and multi-material double gyroids significantly outperform their single material counterparts. However, we establish that at a given relative density, the strength and toughness cannot be simultaneously enhanced for architecture designs, which include varying gyroid orientations, phase volume fractions, and the unit cell length scales of the two phases. Intriguingly, even crack flank bridging by the ductile phase during crack growth is insufficient to overcome this inherent property of the interpenetrating gyroids. Our conclusion is that multi-material interpenetrating micro-architected solids are unlikely to outperform single material non-interpenetrating lattices from a strength–toughness perspective but rather become optimal when multi-functionality is required. Impact statement The integration of materials and architectural features at multiple scales into structural mechanics gave us structural designs such as the Eiffel Tower. The explosion of additive manufacturing methods has opened new avenues for the invention of multi-material micro-architected materials that simultaneously possess high strength and toughness at a low density, and thereby can fill the so-called “white spaces” in the Ashby strength–toughness space. The idea is to construct three-dimensional materials with a network of crack arrestors like in rip-stop nylon and break the link between toughness and strength. We use interconnected and interpenetrating double gyroids comprising ductile and brittle phases as an exemplar to investigate the opportunities of such designs. Intriguingly, from a perspective based solely on strength and toughness, we show that multi-material micro-architectures cannot outperform their single material counterparts at a given relative density. In fact, in most designs the coupling between the two phases is non-synergistic. Rather, we argue that multi-material designs such as those used in rip-stop nylon are driven by multi-functional considerations beyond mechanical properties. Graphical abstract

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Section: Discussionmentioning

confidence: 99%

Section: Impact Articlementioning

confidence: 99%

The coupled strength and toughness of interconnected and interpenetrating multi-material gyroids

Indurkar

Shaikeea

et al. 2022

MRS Bulletin

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“…Recently, heterogeneous soft materials possessing different connectivity features have been exploited to design microstructural systems with high stiffness and high toughness. [35][36][37][38][39] Furthermore, the connectivity throughout the constituent domains is of critical importance in tailoring the optical and structural integrities in natural and synthetic photonic materials. 40,41 Of recent interest are new opportunities to harness both mechanical resilience and energy dissipation capabilities in heterogeneous soft materials on crystal lattices, especially in extreme deformation events involving large strains and high strain rates.…”

Section: Introductionmentioning

confidence: 99%

Extreme resilience and dissipation in heterogeneous elasto-plastomeric crystals

Lee,

Lee

et al. 2024

Soft Matter

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“…As such, we turn to investigations on an emerging lattice structure�interpenetrating lattices (IPLs) composed of two or more directly engineered but disconnected truss lattices that interweave through the same volume. 26,27 Owing to their dispersed fluid phase, IPLs have great potential in sound wave attenuation to be based on the resonance effect if the geometries are proper to form the Helmholtz resonator. 25,28 However, the disconnected topology of IPLs poses functionality limitations in turn.…”

Section: Introductionmentioning

confidence: 99%

“…One direction we can venture into is a new lattice design strategy by which the air phase could be dispersed on demand. As such, we turn to investigations on an emerging lattice structureinterpenetrating lattices (IPLs) composed of two or more directly engineered but disconnected truss lattices that interweave through the same volume. , Owing to their dispersed fluid phase, IPLs have great potential in sound wave attenuation to be based on the resonance effect if the geometries are proper to form the Helmholtz resonator. , However, the disconnected topology of IPLs poses functionality limitations in turn. Deshpande and co-workers suggested that there is no load transfer between the lattices and synergies in strength for this disconnected architecture, and high toughness is hard to be achieved.…”

Section: Introductionmentioning

confidence: 99%

Interpenetrating Hollow Microlattice Metamaterial Enables Efficient Sound-Absorptive and Deformation-Recoverable Capabilities

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Owing to the pervasive noise and crash hazards, tough microlattices with sound absorption capabilities are sought-after. However, typical truss microlattices are unable to fulfill this requirement. To overcome this, herein, we report a new design strategy for truss microlattices via introducing the concept of interpenetrating hollow struts, which thereby constitutes a novel interpenetrating hollow microlattice metamaterial (IHMM). The design is based on interweaved unit cells of a hollow octet-truss (HOT) and a hollow rhombic dodecahedron-like (HRDL) truss. Experimentally demonstrated, the IHMM displays a synergistic gain in both sound absorption and mechanical properties that substantially surpass that of its constituent lattices. High sound absorption coefficients (α > 0.99) and broad half-absorption (3.2 kHz) are observed, with the average α being 110.6 and 85.3% higher than those of the HOT and HRDL, respectively. The sound absorption mechanism is attributed to the presence of cascaded Helmholtz resonance, which is then fully elucidated by impedance and damping analyses. The IHMM also outperforms its constituents in specific strength. A simultaneous high strength (4 MPa) and recoverability (80% strain) and pseudo-reusability are also observed. The mechanisms behind the mechanical reinforcement and exceptional robustness are thoroughly revealed. Overall, this work offers insights into developing multifunctional engineering materials.

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Interpenetrating Lattices with Tailorable Energy Absorption in Tension

Cited by 9 publications

References 29 publications

The coupled strength and toughness of interconnected and interpenetrating multi-material gyroids

The coupled strength and toughness of interconnected and interpenetrating multi-material gyroids

Extreme resilience and dissipation in heterogeneous elasto-plastomeric crystals

Interpenetrating Hollow Microlattice Metamaterial Enables Efficient Sound-Absorptive and Deformation-Recoverable Capabilities

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