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3D printed modular bouligand dissipative structures with adjustable mechanical properties for gradient energy absorbing

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Materials Futures 2024年第2期3卷 104-116页

作者： Junfeng Xiao Mengxing Zhang Fei Zhai Hongrui Wei Sen Liu Peng Wang Zhiyang Liu Zhongying Ji Xiaolong Wang Shenzhen Institute of Information Technology Shenzhen 518172People’s Republic of China Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai Zhongke Research Institute of Advanced Materials and Green Chemical EngineeringYantai 264006People’s Republic of China School of Chemistry and Chemical Engineering Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous RegionShihezi UniversityShihezi 832003People’s Republic of China School of Transportation Engineering Shandong Jianzhu UniversityJinan 250101People’s Republic of China College of Civil and Transportation Engineering Shenzhen UniversityShenzhen 518061People’s Republic of China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesGansu Lanzhou 730000People’s Republic of China

Three-dimensional(3D)printing allows for the creation of complex,layered structures with precise micro and macro architectures that are not achievable through traditional *** designing 3D structures with geometric precision,it is possible to achieve selective regulation of mechanical properties,enabling efficient dissipation of mechanical *** this study,a series of modular samples inspired by the bouligand structure were designed and produced using a direct ink writing system,along with a classical printable polydimethylsiloxane *** altering the angles of filaments in adjacent layers(from 30◦to 90◦)and the filament spacing during printing(from 0.8 mm to 2.4 mm),the mechanical properties of these modular samples can be *** mechanical testing revealed that the 3D printed modular bouligand structures exhibit stress-strain responses that enable multiple adjustments of the elastic modulus from 0.06 MPa to over 0.8 *** mechanical properties were adjusted more than 10 times in printed samples prepared using uniform *** gradient control mechanism of mechanical properties during this process was analyzed using finite element ***,3D printed customized modular bouligand structures can be assembled to create an array with bouligand structures displaying various orientations and interlayer details tailored to specific *** decomposing the original bouligand structure and then assembling the modular samples into a specialized array,this research aims to provide parameters for achieving gradient energy absorption structures through modular 3D printing.

关键词： 3D printing additive manufacturing bouligand structure energy absorbing structures

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Bioinspired tungsten-copper composites with bouligand-type architectures mimicking fish scales

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Journal of Materials Science & Technology 2022年第1期96卷 21-30页

作者： Yuan Zhang Guoqi Tan Mingyang Zhang Qin Yu Zengqian Liu Yanyan Liu Jian Zhang Da Jiao Faheng Wang Longchao Zhuo Zhefeng Zhang Robert O.Ritchie Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China Department of Materials Science and Engineering University of California BerkeleyBerkeleyCA94720USA Jihua Laboratory Foshan 528200China School of Materials Science and Engineering Xi’an University of TechnologyXi’an 710048China

The microscopic bouligand-type architectures of fish scales demonstrate a notable efficiency in enhancing the damage tolerance of materials;nevertheless,it is challenging to reproduce in *** bioinspired tungsten-copper composites with different bouligand-type architectures mimicking fish scales were fabricated by infiltrating a copper melt into woven contextures of tungsten *** composites exhibit a synergetic enhancement in both strength and ductility at room temperature along with an improved resistance to high-temperature *** strengths were interpreted by adapting the classical laminate theory to incorporate the characteristics of bouligand-type *** particular,under load the tungsten fibers can reorient adaptively within the copper matrix by their straightening,stretching,interfacial sliding with the matrix,and the cooperative kinking deformation of fiber grids,representing a successful implementation of the optimizing mechanisms of the bouligand-type architectures to enhance strength and *** study may serve to promote the development of new high-performance tungsten-copper composites for applications,e.g.,as electrical contacts or heat sinks,and offer a viable approach for constructing bioinspired architectures in metallic materials.

关键词： bouligand structure Tungsten-copper composites Fish scales Structural reorientation Bioinspired designs

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