3D printing of biomimetic composites with improved fracture toughness

Jia, Zian; Wang, Lifeng

doi:10.1016/j.actamat.2019.04.052

Cited by 141 publications

(74 citation statements)

References 68 publications

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“…The Bouligand architecture found in crustacean exoskeletons can also act effectively to improve the impact resistance of synthetic composites (Figure 11a). [6,25,205,[215][216][217][218] The inclined micro/nanohairs Adv. Funct.…”

Section: Discussionmentioning

confidence: 99%

“…The inspiration from biological systems with respect of structural orientation and anisotropy may open new avenues toward enhanced material performances from diverse aspects. The Bouligand architecture found in crustacean exoskeletons can also act effectively to improve the impact resistance of synthetic composites ( Figure a) . The inclined micro/nanohairs resembling gecko's setae endow robust attachment and easy detachment of a dry adhesive, which is promising for transport systems (Figure b) .…”

Section: Discussionmentioning

confidence: 99%

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Structural Orientation and Anisotropy in Biological Materials: Functional Designs and Mechanics

Liu

Zhang

Ritchie

2020

Adv Funct Materials

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Biological materials exhibit anisotropic characteristics because of the anisometric nature of their constituents and their preferred alignment within interfacial matrices. The regulation of structural orientations is the basis for material designs in nature and may offer inspiration for man‐made materials. Here, how structural orientation and anisotropy are designed into biological materials to achieve diverse functionalities is revisited. The orientation dependencies of differing mechanical properties are introduced based on a 2D composite model with wood and bone as examples; as such, anisotropic architectures and their roles in property optimization in biological systems are elucidated. Biological structural orientations are designed to achieve extrinsic toughening via complicated cracking paths, robust and releasable adhesion from anisotropic contact, programmable dynamic response by controlled expansion, enhanced contact damage resistance from varying orientations, and simultaneous optimization of multiple properties by adaptive structural reorientation. The underlying mechanics and material‐design principles that could be reproduced in man‐made systems are highlighted. Finally, the potential and challenges in developing a better understanding to implement such natural designs of structural orientation and anisotropy are discussed in light of current advances. The translation of these biological design principles can promote the creation of new synthetic materials with unprecedented properties and functionalities.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Structural Orientation and Anisotropy in Biological Materials: Functional Designs and Mechanics

Liu

Zhang

Ritchie

2020

Adv Funct Materials

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“…Bone is known to have outstanding strength-to-weight and stiffness-to-weight ratios [ 25 ] while also serving an organ-like function for the production of blood cells [ 26 ]. In most cases, a combination of high stiffness and high toughness in these materials can be traced back to intricate microstructures [ 27 , 28 , 29 , 30 , 31 ]. Small domains of protein-based soft phases within a stiff and brittle matrix phase (CaCO 3 , SiO 2 etc.)…”

Section: Introductionmentioning

confidence: 99%

Optimization of Mechanical Properties and Damage Tolerance in Polymer-Mineral Multilayer Composites

et al. 2021

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Talcum reinforced polypropylene was enhanced with a soft type of polypropylene in order to increase the impact strength and damage tolerance of the material. The soft phase was incorporated in the form of continuous interlayers, where the numbers of layers ranged from 64 to 2048. A blend with the same material composition (based on wt% of the used materials) and the pure matrix material were investigated for comparison. A plateau in impact strength was reached by layered architectures, where the matrix layer thickness was as small or smaller than the largest talcum particles. The most promising layered architecture, namely, 512 layers, was subsequently investigated more thoroughly using instrumented Charpy experiments and tensile testing. In these tests, normalised parameters for stiffness and strength were obtained in addition to the impact strength. The multilayered material showed remarkable impact strength, fracture energy and damage tolerance. However, stiffness and strength were reduced due to the addition of the soft phase. It could be shown that specimens under bending loads are very compliant due to a stress-decoupling effect between layers that specifically reduces bending stiffness. This drawback could be avoided under tensile loading, while the increase in toughness remained high.

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“…In particular, designers mimic different porous structures found in nature and try to benefit from their lightweight composition and robustness. Some examples of these structures are bones, 12 shells, 13 and wood. 11 The lattice infill of the structures is mainly constructed by a slicing software before the creation of the g-code, which is sent to the 3D printer.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A comparative study between traditional topology optimization and lattice optimization for additive manufacturing

Tyflopoulos

Steinert

2019

Mat Design & Process Comms

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Topology optimization (TO) aids designers to come up with new ideas that would be impossible to be designed without this technology. However, the optimized results are usually characterized by high geometric complexity, which makes almost impossible their manufacturing by conventional methods. Additive manufacturing (AM) overcomes this problem and increases the design flexibility. In addition, lattice structures with their porous infill combine the design flexibility with good material properties, such as high strength compared with relatively low mass. In this paper, the authors compare designs derived from traditional TO lattice optimization with respect to their tensile strength. A case study of a custom cylindrical model is used to support the theory and collect empirical data. The simulation data as well as the implemented methodology in this work can be used as a guidance for the designers looking for new lightweight design ideas for AM.

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3D printing of biomimetic composites with improved fracture toughness

Cited by 141 publications

References 68 publications

Structural Orientation and Anisotropy in Biological Materials: Functional Designs and Mechanics

Structural Orientation and Anisotropy in Biological Materials: Functional Designs and Mechanics

Optimization of Mechanical Properties and Damage Tolerance in Polymer-Mineral Multilayer Composites

A comparative study between traditional topology optimization and lattice optimization for additive manufacturing

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