A Review of the Selective Laser Melting Lattice Structures and Their Numerical Models

Alomar, Zaki; Concli, Franco

doi:10.1002/adem.202000611

Cited by 77 publications

(50 citation statements)

References 138 publications

(193 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After fitting, the n values obtained were 2.02 and 2.08, respectively, for the FEA and experiment results, with the R -square values of 0.99 and 0.96, respectively. These results agree with the bending-dominated mechanism of the open cell ( n = 2) [ 30 ]. However, the C values of the FEA and experimental results were approximately 1 and 0.16, respectively, implying that the E 0 of the FEA should be smaller than that of the ideal Ti6Al4V specimen.…”

Section: Resultssupporting

confidence: 88%

Finite Element Analysis on Initial Crack Site of Porous Structure Fabricated by Electron Beam Additive Manufacturing

Tsai

Yang

Hung³

et al. 2021

Materials

View full text Add to dashboard Cite

Ti6Al4V specimens with porous structures can be fabricated by additive manufacturing to obtain the desired Young’s modulus. Their mechanical strength and deformation behavior can be evaluated using finite element analysis (FEA), with various models and simulation methodologies described in the existing literature. Most studies focused on the evaluation accuracy of the mechanical strength and deformation behavior using complex models. This study presents a simple elastic model for brittle specimens followed by an electron beam additive manufacturing (EBAM) process to predict the initial crack site and threshold of applied stress related to the failure of cubic unit lattice structures. Six cubic lattice specimens with different porosities were fabricated by EBAM, and compression tests were performed and compared to the FEA results. In this study, two different types of deformation behavior were observed in the specimens with low and high porosities. The adopted elastic model and the threshold of applied stress calculated via FEA showed good capabilities for predicting the initial crack sites of these specimens. The methodology presented in this study should provide a simple yet accurate method to predict the fracture initiation of porous structure parts.

show abstract

Section: Resultssupporting

confidence: 88%

Finite Element Analysis on Initial Crack Site of Porous Structure Fabricated by Electron Beam Additive Manufacturing

Tsai

Yang

Hung³

et al. 2021

Materials

View full text Add to dashboard Cite

show abstract

“… 31 SLM enables the free‐forming of a near‐full dense metal lattice structure at a fine resolution without any need for additional tooling. 32 Despite the relatively high cost of production, the execution of some geometries in this technology is economically justified, as many activities cannot be performed manually even with the highest quality equipment. 33 It should be emphasized that 3D printing from metals is becoming more and more popular production method.…”

Section: D Printing Rulesmentioning

confidence: 99%

“… 28 Metal additive manufacturing exhibits a huge potential in terms of the design flexibility and the optimization of the lattice structure design features. 32 , 51 , 52 Laser powder bed fusion and directed energy deposition are the most common AM methods to process steels. 53 In the 3D printing process, metals are combined with petroleum‐based synthetic materials.…”

Section: D Printing Rulesmentioning

confidence: 99%

State of the art in additive manufacturing and its possible chemical and particle hazards—review

et al. 2021

View full text Add to dashboard Cite

Additive manufacturing, enabling rapid prototyping and so‐called on‐demand production, has become a common method of creating parts or whole devices. On a 3D printer, real objects are produced layer by layer, thus creating extraordinary possibilities as to the number of applications for this type of devices. The opportunities offered by this technique seem to be pushing new boundaries when it comes to both the use of 3D printing in practice and new materials from which the 3D objects can be printed. However, the question arises whether, at the same time, this solution is safe enough to be used without limitations, wherever and by everyone. According to the scientific reports, three‐dimensional printing can pose a threat to the user, not only in terms of physical or mechanical hazards, but also through the potential emissions of chemical substances and fine particles. Thus, the presented publication collects information on the additive manufacturing, different techniques, and ways of printing with application of diverse raw materials. It presents an overview of the last 5 years’ publications focusing on 3D printing, especially regarding the potential chemical and particle emission resulting from the use of such printers in both the working environment and private spaces.

show abstract

“…3 DESIGN FOR AM The flexibility of AM [28] opens new scenarios in terms of optimization and re-design of existing components. In the next sections, three examples are studied.…”

Section: Low-cycle-fatigue Testsmentioning

confidence: 99%

Design for Additive Manufacturing: Is It an Effective Alternative? Part 1 – Material Characterization and Geometrical Optimization

Concli

Molinaro

Rampazzo

2021

Computational Methods and Experimental Measurements XX

Self Cite

View full text Add to dashboard Cite

Additive manufacturing (AM) is becoming a more and more widespread (and trendy) approach. Its flexibility and capability to manufacture any topology has opened new possibilities: AM could lead to significant performance improvements thanks to the exploitation of lattice or reticular structures as partial replacement of the traditional solid design. The potential of this technology knows no bounds. However, in the real world, the lower performances of the materials and the high manufacturing costs significantly restrict the fields of application for which the adoption of AM results effective. In this context, the mechanical static and fatigue properties of a 17-4 PH stainless steel produced via AM were experimentally measured and compared with those of the wrought material to quantify the performance reduction. Based on these data, three components, namely a hip prosthesis, a blow plastic bottle die, and an automotive gear were selected as representative examples to show the pros and contra of AM. The three components were chosen because they belong to three quite dissimilar fields and are produced in different batch sizes. The three original designs were specifically optimized for AM by means of finite element (FE) simulations. The new solutions fulfil the strength requirements of the original parts showing at the same time reduced weights and inertias. The traditional and new designs were compared in terms of production times and costs to quantify the real benefits of AM for different applications.

show abstract

A Review of the Selective Laser Melting Lattice Structures and Their Numerical Models

Cited by 77 publications

References 138 publications

Finite Element Analysis on Initial Crack Site of Porous Structure Fabricated by Electron Beam Additive Manufacturing

Finite Element Analysis on Initial Crack Site of Porous Structure Fabricated by Electron Beam Additive Manufacturing

State of the art in additive manufacturing and its possible chemical and particle hazards—review

Design for Additive Manufacturing: Is It an Effective Alternative? Part 1 – Material Characterization and Geometrical Optimization

Contact Info

Product

Resources

About