Design Optimization of Irregular Cellular Structure for Additive Manufacturing

2017 ◽  
Vol 30 (5) ◽  
pp. 1184-1192 ◽  
Author(s):  
Guo-Hua Song ◽  
Shi-Kai Jing ◽  
Fang-Lei Zhao ◽  
Ye-Dong Wang ◽  
Hao Xing ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Design Optimization ◽  
Cellular Structure

What Is Design for Additive Manufacturing (DfAM)?

2020 ◽  
pp. 164-186
Author(s):  
Seung Hwan Joo ◽  
Sung Mo Lee ◽  
Jin Ho Yoo ◽  
Hyeon Jin Son ◽  
Seung Ho Lee
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Design Optimization ◽  
Advanced Manufacturing ◽  
Design For Additive Manufacturing ◽  
Printing Technology ◽  
Actual Production ◽  
Manufacturing Design ◽  
Metal 3D Printing ◽  
Is Design

In order to use 3D printing technology as a sanction, it is necessary to optimize topology, component unification, and reduce weight need for advanced manufacturing design. In the case of metal 3D printing, it is necessary to manage deformation and defects in the process cause of using laser, and support generation and design optimization must be accompanied for efficiency. Currently, design progresses through simulation before actual production in AM field. This chapter explores design in additive manufacturing.

Practical design optimization of cellular structures for additive manufacturing

2019 ◽  
Vol 52 (11) ◽  
pp. 1887-1902 ◽  
Author(s):  
Yu Wang ◽  
Dezheng Hu ◽  
Hailin Wang ◽  
Tinghao Zhang ◽  
Hao Yan
Keyword(s):  
Additive Manufacturing ◽  
Design Optimization ◽  
Cellular Structures ◽  
Practical Design

Experimental-assisted design development for an octahedral cellular structure using additive manufacturing

2015 ◽  
Vol 21 (2) ◽  
pp. 168-176 ◽  
Author(s):  
Li Yang
Keyword(s):  
Additive Manufacturing ◽  
Size Effect ◽  
Cellular Structure ◽  
Beam Theory ◽  
Unit Cell ◽  
Cellular Structures ◽  
Design Development ◽  
Content Type ◽  
Softening Behavior ◽  
3D Cellular Structures

Purpose – This paper aims to demonstrate the design and verification of a 3D reticulate octahedral cellular structure using both analytical modeling and additive manufacturing. Traditionally, it has been difficult to develop and verify designs for 3D cellular structures due to their design complexity. Design/methodology/approach – Unit cell modeling approach was used to model the octahedral cellular structure. By applying structural symmetry simplification, the cellular structure was simplified into a representative geometry that could be further designed with a standard beam theory. The verification samples were fabricated with EBM process using Ti6Al4V as materials, and compressive testing were performed to evaluate their properties. In addition, designs with different number of unit cells were investigated to evaluate their size effect. Findings – Explicit mechanical property design (including modulus and compressive strength) of the octahedral cellular structure was realized via parametric equations driven by geometrical designs and material types. In addition, it was verified both numerically and experimentally that the octahedral cellular structure exhibit unusual size effect, which is highly predictable. Unlike some of the other cellular structures, the octahedral cellular structure exhibits softening behavior when the number of unit cell increases between the sandwich skins, which could be explained by the upsetting effect commonly observed in bulk deformation processes. Originality/value – This paper established a more comprehensive understanding in the design of octahedral cellular structures, which could enable this type of structure to be designed for sandwich structures with higher fidelity. Therefore, this study not only demonstrated an efficient methodology to design 3D cellular structures using additive manufacturing, but also facilitated the development of design for an additive manufacturing theory.

scholarly journals Design Optimization of Plastic Injection Tooling for Additive Manufacturing

2017 ◽  
Vol 10 ◽  
pp. 923-934 ◽  
Author(s):  
Tong Wu ◽  
Suchana A. Jahan ◽  
Yi Zhang ◽  
Jing Zhang ◽  
Hazim Elmounayri ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Design Optimization ◽  
Plastic Injection

scholarly journals Designing Cellular Structures for Additive Manufacturing Using Voronoi–Monte Carlo Approach

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1158
Author(s):  
Liu ◽  
Guessasma ◽  
Zhu ◽  
Zhang
Keyword(s):  
Monte Carlo ◽  
Relaxation Time ◽  
Additive Manufacturing ◽  
Computer Aided Design ◽  
Cellular Structure ◽  
Cellular Structures ◽  
Monte Carlo Approach ◽  
Aided Design ◽  
Fully Connected ◽  
Seed Points

This study aims at reporting a strategy of designing cellular materials based on Voronoi–Monte Carlo approach for additive manufacturing. The approach is implemented to produce a fully connected cellular structure in the design space without producing material discontinuity. The main characteristics of the cellular structure, such as the density and the cell size, are controlled by means of two generation parameters, namely the number of seed points and the relaxation time. The generated cellular structures representing various designs of generated cellular wrenches are converted into surface tessellations and manufactured using stereolithography. Bending experiments are performed up to the rupture point and main attributes representing the performance of the SL-based cellular wrenches are studied with respect to the generation parameters. The results show only slight difference between CAD (Computer-Aided Design) models of the design and the real printed parts. The number of seed points is found to control the main feature of the wrench performance whereas the relaxation time is found to have a secondary effect.

scholarly journals Design and Thermal Comparison of Random Structures Realized by Indirect Additive Manufacturing

Materials ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2261 ◽  
Author(s):  
Daniele Almonti ◽  
Nadia Ucciardello
Keyword(s):  
Additive Manufacturing ◽  
Cellular Structure ◽  
Metal Foam ◽  
Three Dimensional ◽  
Casting Process ◽  
Metal Foams ◽  
Thermal Coefficient ◽  
3D Print ◽  
Random Structures ◽  
Am Processes

Additive manufacturing (AM) processes are used to fabricate three-dimensional complex geometries. There are several technologies that use laser or electron beam over metal powder beds. However, the direct AM processes have inconveniences such as specific set of materials, high thermal stress traced, high local energy absorbed, poor surface finish, anisotropic properties, high cost of material powder, and manufacturing with high-power beams. In this paper, an alternative process was developed. An indirect additive manufacturing (I-AM) combining a 3D print of castable resin and metal casting in order to obtain a cellular structure similar in shape to commercial metal foams but completely definable as design features was developed. Design of the cellular structure was made by the graphical algorithm editor Grasshopper®. Designed structures were realized by a lost-wax casting process and compared with commercial foam specimens by a system designed for this work. The designed metal foams showed a performance superior to that of commercial metal foam; in particular, the heat thermal coefficient of designed metal foams in the better case was 870 W/m2·K, almost doubled in comparison with the commercial foam tested in this work.

Design optimization of heat sink using additive manufacturing

2017 ◽  
Author(s):  
Y. Tateishi ◽  
V. Parque ◽  
T. Miyashita ◽  
H. Gohara ◽  
R. Kato ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Design Optimization ◽  
Heat Sink
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