Dynamic response of additively manufactured graded foams

Duan, Yu; Zhao, Xianhang; Li, Yong; Hou, Naidan; Liu, Huifang; Du, Bing; Hou, Bing; Li, Yulong

doi:10.1016/j.compositesb.2019.107630

Cited by 45 publications

(10 citation statements)

References 48 publications

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“…In addition to quasistatic compression, [21,40,41] drop weight impact [42] and projectile impact tests [43] are used to study the slow rate and low-velocity impact response of density-graded foams and characterize the high-energy and high-velocity impact response and crashworthiness of these structures. For example, Xia et al [44] conducted blast tests to analyze the effectiveness of density-graded foams for blast mitigation.…”

Section: Characterization Of the Mechanical Response Of Graded Foamsmentioning

confidence: 99%

Density‐Graded Cellular Solids: Mechanics, Fabrication, and Applications

et al. 2021

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Cellular solids have gained extensive popularity in different areas of engineering due to their unique physical and mechanical properties. Recent advancements in manufacturing technologies have led to the development of cellular solids with highly controllable microstructures and properties modulated for multiple functionalities at low structural weights. The concept of density gradation in cellular solids has recently gained attention due to its potentials in opening new doors to the development of lightweight structures that offer optimal physical and mechanical properties without compromising their favorable characteristics. Herein, a comprehensive insight into the fundamental concepts, fabrication, and current and potential applications of density‐graded cellular solids in various areas of science and engineering is provided. Cellular solids are broadly classified into two main categories: foams and lattice structures. An overview of the fundamental concepts in each category is presented, followed by details on the characterization approaches and some of the most novel processing techniques utilized in fabricating the structures. The uses of density‐graded structures in load‐bearing, acoustic, and biomedical applications are highlighted. The state of the art in each category and the current trends in application‐specific optimization of density‐graded structures are discussed. The review concludes with an outlook of the future directions in this exciting field.

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Section: Characterization Of the Mechanical Response Of Graded Foamsmentioning

confidence: 99%

Density‐Graded Cellular Solids: Mechanics, Fabrication, and Applications

et al. 2021

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“…The research of cellular media is growing rapidly and has been widely used in fields of packaging boxes, transportation, daily necessities, industrial manufacturing, and aerospace. There will be more applications in the future: The deformation mode and failure mechanism of cellular media under explosive loading and ultrahigh strain rates, gradient cellular material (gradient mode) structural design and performance optimization [ 18 , 57 , 71 , 154 , 155 , 156 , 157 , 158 , 159 ], and functional foam composite materials (e.g., doped metal particles, carbon nanotubes, and graphene) [ 21 , 160 , 161 , 162 , 163 ] are the keys to future research on cellular media. Expand the mechanical constitutive models of cellular media to suitable for various complex loads, and propose more constitutive models to understand the multifunctional performance of cellular media.…”

Section: Discussionmentioning

confidence: 99%

“…The deformation mode and failure mechanism of cellular media under explosive loading and ultrahigh strain rates, gradient cellular material (gradient mode) structural design and performance optimization [ 18 , 57 , 71 , 154 , 155 , 156 , 157 , 158 , 159 ], and functional foam composite materials (e.g., doped metal particles, carbon nanotubes, and graphene) [ 21 , 160 , 161 , 162 , 163 ] are the keys to future research on cellular media.…”

Section: Discussionmentioning

confidence: 99%

A Review on Mechanical Models for Cellular Media: Investigation on Material Characterization and Numerical Simulation

et al. 2021

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Cellular media materials are used for automobiles, aircrafts, energy-efficient buildings, transportation, and other fields due to their light weight, designability, and good impact resistance. To devise a buffer structure reasonably and avoid resource and economic loss, it is necessary to completely comprehend the constitutive relationship of the buffer structure. This paper introduces the progress on research of the mechanical properties characterization, constitutive equations, and numerical simulation of porous structures. Currently, various methods can be used to construct cellular media mechanical models including simplified phenomenological constitutive models, homogenization algorithm models, single cell models, and multi-cell models. This paper reviews current key mechanical models for cellular media, attempting to track their evolution from their inception to their latest development. These models are categorized in terms of their mechanical modeling methods. This paper focuses on the importance of constitutive relationships and microstructure models in studying mechanical properties and optimizing structural design. The key issues concerning this topic and future directions for research are also discussed.

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“…[ 11 ] experimentally observed that the deformation region of size irregularity gradient foam was significantly smaller than that of cell wall gradient foam with identical relative density gradient. Both discrete [ 22 , 24 , 31 ] and continuous [ 16 , 43 ] size irregularity gradient foams have been constructed using the Voronoi technique to examine macroscopic properties such as the effective elastic modulus, reaction force, densification strain, and energy absorption. Based on the assumption that gradient structures can be replaced by uniform structures with the same relative density using a layer-by-layer method [ 16 , 18 ], a few theoretical models have been proposed to characterize the compressive response of gradient foams based on relative density gradient [ 16 , 43 , 44 ].…”

Section: Introductionmentioning

confidence: 99%