Adaptive mechanical properties of topologically interlocking material systems

Khandelwal, Shriya; Siegmund, Thomas; Cipra, Raymond J.; Bolton, J. Stuart

doi:10.1088/0964-1726/24/4/045037

Cited by 30 publications

(15 citation statements)

References 49 publications

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“…4, volume averages of stresses for each section in Fig. 13 were used and the maximum principal stress (MPS) values for each section was calculated similar to the socalled thrust-lines method used previously for topologically interlocked materials to obtain ROM definitions [33]. For both course and wale tension cases, Fig.…”

Section: Two-dimensional Reduced Order Model Comparisonmentioning

confidence: 99%

A Computational Approach to Model Interfacial Effects on the Mechanical Behavior of Knitted Textiles

Liu

Shakibajahromi

Dion

et al. 2018

Journal of Applied Mechanics

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The mechanical behavior of knitted textiles is simulated using finite element analysis (FEA). Given the strong coupling between geometrical and physical aspects that affect the behavior of this type of engineering materials, there are several challenges associated with the development of computational tools capable of enabling physics-based predictions, while keeping the associated computational cost appropriate for use within design optimization processes. In this context, this paper investigates the relative contribution of a number of computational factors to both local and global mechanical behavior of knitted textiles. Specifically, different yarn-to-yarn interaction definitions in three-dimensional (3D) finite element models are compared to explore their relative influence on kinematic features of knitted textiles' mechanical behavior. The relative motion between yarns identified by direct numerical simulations (DNS) is then used to construct reduced order models (ROMs), which are shown to be computationally more efficient and providing comparable predictions of the mechanical performance of knitted textiles that include interfacial effects between yarns.

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Section: Two-dimensional Reduced Order Model Comparisonmentioning

confidence: 99%

A Computational Approach to Model Interfacial Effects on the Mechanical Behavior of Knitted Textiles

Liu

Shakibajahromi

Dion

et al. 2018

Journal of Applied Mechanics

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“…Considering aspects of sustainability as a functionality, TIMs-due to the spatial confinement of damage-then provide a path leading to the implementation of reusable engineering material systems. Responsive TIMs [34,35] can form the basis for smart energy absorbing material systems. Based on such approaches, adaptive packaging material can be envisioned, which adaptively can be changed to conform to the present object to be protected.…”

Section: Discussionmentioning

confidence: 99%

“…In Ref. [35], the authors employ active and adaptive control of the external constraints to achieve variable stiffness, including negative stiffness. This study furthermore demonstrates that active control allows to hold the force constant over a large range of transverse deflection.…”

Section: -6 / Vol 68 July 2016mentioning

confidence: 99%

“…[11], it was demonstrated that the enhanced damage tolerance inherent to TIMs can be realized also for certain ranges of dynamic loading conditions. Recently, Estrin and coworkers [34] demonstrated the control of TIM system stiffness through active control of the internal constraint, while Khandelwal et al [35] showed the adaptive characteristics of TIMs to energy absorption based on control of the external constraint. Carlesso et al [36,37] illustrated that TIM systems can possess enhanced sound absorption, based on the dynamic contact processes among basic building blocks.…”

Section: Introductionmentioning

confidence: 99%

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Manufacture and Mechanics of Topologically Interlocked Material Assemblies

Siegmund

Barthelat

Cipra

et al. 2016

Applied Mechanics Reviews

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Topologically interlocked material (TIM) systems are load-carrying assemblies of unit elements interacting by contact and friction. TIM assemblies have emerged as a class of architectured materials with mechanical properties not ordinarily found in monolithic solids. These properties include, but are not limited to, high damage tolerance, damage confinement, adaptability, and multifunctionality. The review paper provides an overview of recent research findings on TIM manufacturing and TIM mechanics. We review several manufacturing approaches. Assembly manufacturing processes employ the concept of scaffold as a unifying theme. Scaffolds are understood as auxiliary support structures employed in the manufacturing of TIM systems. It is demonstrated that the scaffold can take multiple forms. Alternatively, processes of segmentation are discussed and demonstrated. The review on mechanical property characteristics links the manufacturing approaches to several relevant material configurations and details recent findings on quasi-static and impact loading, and on multifunctional response.

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“…Significant studies on plates assembled from tetrahedron-shaped elements have been conducted474849, with stiffness-scaling relationships established50 and thrust line models developed to describe mechanical behaviour of such assemblies51. This concept has been further developed to include building blocks with non-planar surfaces52.…”

mentioning

confidence: 99%

Enhanced Mechanical Performance of Bio-Inspired Hybrid Structures Utilising Topological Interlocking Geometry

Djumas

Molotnikov

Simon

et al. 2016

Sci Rep

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Structural composites inspired by nacre have emerged as prime exemplars for guiding materials design of fracture-resistant, rigid hybrid materials. The intricate microstructure of nacre, which combines a hard majority phase with a small fraction of a soft phase, achieves superior mechanical properties compared to its constituents and has generated much interest. However, replicating the hierarchical microstructure of nacre is very challenging, not to mention improving it. In this article, we propose to alter the geometry of the hard building blocks by introducing the concept of topological interlocking. This design principle has previously been shown to provide an inherently brittle material with a remarkable flexural compliance. We now demonstrate that by combining the basic architecture of nacre with topological interlocking of discrete hard building blocks, hybrid materials of a new type can be produced. By adding a soft phase at the interfaces between topologically interlocked blocks in a single-build additive manufacturing process, further improvement of mechanical properties is achieved. The design of these fabricated hybrid structures has been guided by computational work elucidating the effect of various geometries. To our knowledge, this is the first reported study that combines the advantages of nacre-inspired structures with the benefits of topological interlocking.

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Adaptive mechanical properties of topologically interlocking material systems

Cited by 30 publications

References 49 publications

A Computational Approach to Model Interfacial Effects on the Mechanical Behavior of Knitted Textiles

A Computational Approach to Model Interfacial Effects on the Mechanical Behavior of Knitted Textiles

Manufacture and Mechanics of Topologically Interlocked Material Assemblies

Enhanced Mechanical Performance of Bio-Inspired Hybrid Structures Utilising Topological Interlocking Geometry

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