From Architectured Materials to Large-Scale Additive Manufacturing

Dirrenberger, Justin

doi:10.1007/978-3-319-70866-9_4

Cited by 2 publications

(2 citation statements)

References 130 publications

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“…These properties include stiffness, strength, heat dissipation, heat transmission and others [37]. The introduction of mesostructures to the construction industry is aimed to fill the gap between the developments in materials science at the microscale and the work of structural engineers [38]. While developments in this scale have been reserved to specific applications such as metal trusses, new degrees of freedom offered by digital manufacturing can be used to create optimised substructures at different scales.…”

Section: Applicability To Concrete Constructionmentioning

confidence: 99%

Grading Material Properties in 3D Printed Concrete Structures

Vargas

Westerlind

Silfwerbrand

2022

Nordic Concrete Research

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Functionally graded materials (FGMs) describe composite materials with a gradual change in properties along one or several axes. A major advantage with this approach is the avoidance of discontinuities between different layers of material. 3D Printing offers the possibility to control the material composition and spatial placement along the printing process to create structures with graded properties. However, there are very few examples of the application of this approach to 3D concrete printing (3DCP). This paper presents a review of the current approaches of and methods to grade the material properties of a 3DCP structure, as well as a review of similar methods used in other 3D printing processes. Finally, the potential applicability of these principles into concrete are presented and discussed.

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Section: Applicability To Concrete Constructionmentioning

confidence: 99%

Grading Material Properties in 3D Printed Concrete Structures

Vargas

Westerlind

Silfwerbrand

2022

Nordic Concrete Research

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“…In particular, the maximum printing size for the available additive manufacturing machines (within budget) can be a significant design constraint. While a large scale additive manufacturing machines (e.g., Reference 10) are being developed, it still suffers from low precision, large distortion, and limitation of compatible materials.…”

Section: Introductionmentioning

confidence: 99%

Multicomponent topology optimization of functionally graded lattice structures with bulk solid interfaces

2021

Numerical Meth Engineering

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This article presents a topology optimization method for structures consisting of multiple lattice components under a certain size, which can be manufactured with an additive manufacturing machine with a size limit and assembled via conventional joining processes, such as welding, gluing, riveting, and bolting. The proposed method can simultaneously optimize overall structural topology, partitioning to multiple components and functionally graded lattices within each component. The functionally graded lattice infill with guaranteed connectivity is realized by applying the Helmholtz PDE filter with a variable radius on the density field in the solid isotropic material with penalization (SIMP) method.The partitioning of an overall structure into multiple components is realized by applying the discrete material optimization (DMO) method, in which each material is interpreted as each component, and the size limit for each component imposed by a chosen additive manufacturing machine. A gradient-free coating filter realizes bulk solid boundaries for each component, which provide continuous mating surfaces between adjacent components to enable the subsequent joining. The structural interfaces between the bulk solid boundaries are extracted and assigned a distinct material property, which model the joints between the adjacent components. Several numeral examples are solved for demonstration. K E Y W O R D Sbulk solid interfaces, lattice infill, multicomponent structures, topology optimization INTRODUCTIONLattice structures exhibit superior structural properties such as low stiffness-to-weight ratio, robustness for random direction loads, damage resistance against defects, and extreme physical properties such as large energy absorption, 1,2 negative Poisson's ratio, 3,4 large thermal expansion, 5,6 and special acoustic absorption. 7,8 Owing to the recent advancement in additive manufacturing processes, especially those in metals, the fabrication and testing of engineered lattice structures have become much more accessible to researchers. Thompson et al. 9 reviewed recent work on design for additive manufacturing including the design of engineered lattice structures. They pointed out there was still a lack of systematic design method to overcome the complexity of lattice structures whose dimension spans from the micro/meso-scale to macro-scale. In addition to the structural complexity, additively manufactured lattice structures for industrial applications

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From Architectured Materials to Large-Scale Additive Manufacturing

Cited by 2 publications

References 130 publications

Grading Material Properties in 3D Printed Concrete Structures

Grading Material Properties in 3D Printed Concrete Structures

Multicomponent topology optimization of functionally graded lattice structures with bulk solid interfaces

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