On the difference in material structure and fatigue properties of nylon specimens produced by injection molding and selective laser sintering

Hooreweder, Brecht Van; Moens, David; Boonen, René; Kruth, Jean‐Pierre; Sas, Paul

doi:10.1016/j.polymertesting.2013.04.014

Cited by 166 publications

(107 citation statements)

References 15 publications

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“…In previous work by the present authors, the influence of a dynamic tension/compression load on SLS-PA12 parts was analysed and related to the density, crystallinity, and microstructure of the material [3,4]. It was found that the material density is a crucial factor influencing the fatigue life.…”

Section: Introductionmentioning

confidence: 86%

“…Since no artificial cooling is applied, adiabatic conditions apply and hence the generated heat is transferred into temperature rise of the sample. This temperature rise during cyclic testing can be related to the area within the hysteresis curves [4]. Figure 5 presents such curves for a plain SLSx sample subjected to a load amplitude of 1kN with a test frequency of 1Hz.…”

Section: Fatigue Behaviour Of Plain Specimensmentioning

confidence: 99%

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High cycle fatigue properties of selective laser sintered parts in polyamide 12

Hooreweder

Kruth

2014

CIRP Annals

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Selective laser sintered parts in polyamide are increasingly being used in functional applications. The monotonic properties of these parts are wellknown and documented. The cyclic material properties, on the other hand, are largely unknown. Therefore, in this paper a systematic analysis is made of fatigue properties and failure mechanisms of selective laser sintered parts subjected to fluctuating loading in tension/compression. Both plain and notched specimens are produced along perpendicular building directions. The fatigue behaviour of these parts is analysed and compared to injection moulded samples. In addition, the influence of the test frequency and the notch manufacturing method is studied.Additive Manufacturing, Selective Laser Sintering, Fatigue

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Section: Introductionmentioning

confidence: 86%

Section: Fatigue Behaviour Of Plain Specimensmentioning

confidence: 99%

High cycle fatigue properties of selective laser sintered parts in polyamide 12

Hooreweder

Kruth

2014

CIRP Annals

Self Cite

View full text Add to dashboard Cite

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“…The powders or starting materials that could be used include; polyamides, polystyrenes or polycarbonates (70). The sintered materials form part of the final object while the un-sintered materials remain as part of the supporting structure and requires post printing processing to be removed (71).…”

Section: Selective Laser Sintering (Sls) 3d Printingmentioning

confidence: 99%

Emergence of 3D Printed Dosage Forms: Opportunities and Challenges

et al. 2016

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The recent introduction of the first FDA approved 3D-printed drug has fuelled interest in 3D printing technology, which is set to revolutionize healthcare. Since its initial use, this rapid prototyping (RP) technology has evolved to such as extent that it is currently being used in a wide range of applications including in tissue engineering, dentistry, construction, automotive and aerospace. However, in the pharmaceutical industry this technology is still in its infancy and its potential yet to be fully explored. This paper presents various 3D printing technologies such as stereolithographic, powder based, selective laser sintering, fused deposition modelling and semi-solid extrusion 3D printing. It also provides a comprehensive review of previous attempts at using 3D printing technologies on the manufacturing dosage forms with a particular focus on oral tablets. Their advantages particularly with adaptability in the pharmaceutical field have been highlighted, including design flexibility and control and manufacture which enables the preparation of dosage forms with complex designs and geometries, multiple actives and tailored release profiles. An insight into the technical challenges facing the different 3D printing technologies such as the formulation and processing parameters is provided. Light is also shed on the different regulatory challenges that need to be overcome for 3D printing to fulfil its real potential in the pharmaceutical industry.

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“…Amel et al [7] investigated fatigue behaviour of LS Nylon 12 parts subject to displacementcontrolled tension only fatigue loading. In a recent study, Van Hooreweder et al [8] have explored the difference in fatigue behaviour of LS and injection moulded Nylon Several factors, both internal and external, have been identified as parameters that could influence cyclic performance and fatigue life of polymers [9]- [11]. Therefore, any parameter that is considered likely to affect the internal structure of the polymer parts might influence the cyclic performance as well.…”

Section: Introductionmentioning

confidence: 99%

Effect of section thickness on fatigue performance of laser sintered nylon 12

et al. 2016

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Laser Sintering offers manufacturers freedom of design, which enables creating parts with complex geometries. However, very little investigation has been made into the effects of geometry on mechanical properties of the parts. In the present study, Laser Sintered Nylon 12 parts with different section-thickness are subjected to displacement-controlled tension-tension and force-controlled fully-reversed fatigue loading to investigate the effect of geometry on their fatigue behaviour. Sectionthickness of the parts is shown to have no significant influence on the fatigue behaviour under tension-only loading. However, fatigue life of parts under fullyreversed loading is shown to increase with section thickness.

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On the difference in material structure and fatigue properties of nylon specimens produced by injection molding and selective laser sintering

Cited by 166 publications

References 15 publications

High cycle fatigue properties of selective laser sintered parts in polyamide 12

High cycle fatigue properties of selective laser sintered parts in polyamide 12

Emergence of 3D Printed Dosage Forms: Opportunities and Challenges

Effect of section thickness on fatigue performance of laser sintered nylon 12

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