The influence of build orientation on the mechanical properties of medical implants made from PA 2200 by Selective Laser Sintering

Păcurar, Răzvan; Păcurar, Ancuţa; Petrilak, Anna

doi:10.1051/matecconf/201711203009

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…The study revealed that the material was transversely isotropic in Young’s modulus, strained to failure and generally orthotropic in ultimate tensile strength as well as inhomogeneous throughout the build volume; these results further emphasized the findings of Ajoku et al (2006) and Caulfield et al (2007). Also, Razvan et al (2017) have investigated the effects of build orientation on the compressive strength of SLS parts manufactured from PA2200 combatable material to determine the optimal orientation at which the mechanical properties of fabricated parts are close to those of the human bones. The samples were manufactured at LP of 4 – 4.5W and different build orientations.…”

Section: Introductionmentioning

confidence: 73%

Orthotropic properties of cement-filled polyamide 12 manufactured by selective laser sintering

Aldahash

Gadelmoula

2020

RPJ

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Purpose The cement-filled PA12 manufactured by selective laser sintering (SLS) offers desirable mechanical properties; however, these properties are dependent on several fabrication parameters. As a result, SLS prototypes may exhibit orthotropic mechanical properties unless properly oriented in build chamber. This paper aims to evaluate the effects of part build orientation, laser energy and cement content on mechanical properties of cement-filled PA12. Design/methodology/approach The test specimens were fabricated by SLS using the “DTM Sinterstation 2000” system at which the specimens were aligned along six different orientations. The scanning speed was 914mm/s, scan spacing was 0.15mm, layer thickness was 0.1mm and laser power was 4.5–8Watt. A total of 270 tensile specimens, 270 flexural specimens and 135 compression specimens were manufactured and the tensile, compression and flexural properties of fabricated specimens were evaluated. Findings The experiments revealed orientation-dependent (orthotropic) mechanical properties of SLS cement-filled PA12 and confirmed that the parts with shorter scan vectors have enhanced flexural strength as compared with longer scan vectors. The maximum deviations of ultimate tensile strength, compressive strength and flexural modulus along the six orientations were 32%, 26% and 36%, respectively. Originality/value Although part build orientation is a key fabrication parameter, very little was found in open literature with contradictory findings about its effect on mechanical properties of fabricated parts. In this work, the effects of build orientation when combined with other fabrication parameters on the properties of SLS parts were evaluated along six different orientations.

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Section: Introductionmentioning

confidence: 73%

Orthotropic properties of cement-filled polyamide 12 manufactured by selective laser sintering

Aldahash

Gadelmoula

2020

RPJ

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“…Better mechanical properties are achieved along with the printing layer and worse in a direction normal to the printing layer. There are many ways in which the mechanical properties of materials can be tested [26][27][28]. Also, greater precision and greater detailed geometry can be achieved in planes parallel to the print layer where print accuracy is higher.…”

Section: Additive Manufacturing Technologiesmentioning

confidence: 99%

Framework for Design and Additive Manufacturing of Specialised Multirotor UAV Parts

Petar¹,

Krznar²,

Krznar³

et al. 2022

Trends and Opportunities of Rapid Prototyping Technologies

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Rapid prototyping technologies have enabled a major step forward in the development of a very wide range of products, especially in the field of mechatronic systems. These technologies are largely related to additive manufacturing (AM), so-called 3D printing which is, in addition to product development, also suitable for the fabrication of mechatronic systems that are not intended for series production. In this chapter, a framework for the AM of specialised multirotor unmanned aerial vehicles (UAVs) parts is proposed and described for three AM technologies—fused deposition modelling (FDM), selective laser sintering (SLS), and stereolithography (SLA). A different approach to parts design is shown where the main problems are addressed and guidelines for parts manufacturing are given. Special emphasis is related to the mechanical characteristics and low weight of the manufactured parts that are merged with carbon fibre segments. The manufactured (printed) parts are mounted in functional assemblies and preliminarily tested.

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Optimizing FDM 3D Printing of Medical Models

STRNAD

2024

AMSET

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Present paper presents the results on four cases of optimization of FDM 3D printing of medical models used for training on specific medical issues (2 cases) and of personalized patient-specific models used for complex Trauma and Orthopedic surgical procedures planning (2 cases). Depending on optimization criteria (proper combination of model splitting – minimum need of supports/or no supports – minimization of printing time and material consumption, facile support removal and good surface quality), the modification of the Cura slicer recommended settings related to layer thickness and support pattern, support Z distance, support X/Y distance, support overhang angle, and minimum support area, allowed the reduction of 3D printing time with 24% and 33%, very easy support removal, and an assessment of surface accuracy and quality as very good for the purpose, made by end users.

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The influence of build orientation on the mechanical properties of medical implants made from PA 2200 by Selective Laser Sintering

Cited by 3 publications

References 17 publications

Orthotropic properties of cement-filled polyamide 12 manufactured by selective laser sintering

Orthotropic properties of cement-filled polyamide 12 manufactured by selective laser sintering

Framework for Design and Additive Manufacturing of Specialised Multirotor UAV Parts

Optimizing FDM 3D Printing of Medical Models

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