Anisotropic and rate-dependent mechanical properties of 3D printed polyamide 12 - A comparison between selective laser sintering and multi jet fusion

Mehdipour, Fatemeh; Gebhardt, Ulrike; Kästner, Markus

doi:10.1016/j.rinma.2021.100213

Cited by 29 publications

(34 citation statements)

References 6 publications

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“…Mehdipour et al [15] examined the mechanical properties of PA 12 as a function of the printing direction in SLS and multijet fusion (MFJ) techniques using cross-head speeds of 5 mm min −1 −1 and 50 mm min −1 . The results showed that the transverse build direction exhibited the highest UTS and EM values, followed by the horizontal and vertical build directions.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of polyamide 12 manufactured by means of SLS: Influence of wall thickness and build direction

Rodríguez,

Mora,

Velasco

et al. 2023

Mater. Res. Express

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The wall thickness and build direction of PA 12 parts manufactured via SLS are currently being investigated for applications requiring low weight and good mechanical properties (ultimate tensile strength, elongation at break, elastic modulus, and hardness). Current design guidelines for the SLS process include recommendations about the influence of build direction on the mechanical properties of the part; however, the recommended minimum wall thickness only considers the process's manufacturability, so this study aims to determine the wall thickness and build orientation conditions that present the slightest difference in mechanical properties, considering different conditions such as vertical, horizontal, and transverse build directions and wall thicknesses of 2.0, 2.5 and 3.0 mm. Statistical differences were found between build direction, ultimate tensile stress, and elongation at break and hardness. It was observed that the significant differences in the direction of impression were between the vertical direction vs the transverse and horizontal directions. The differences were between the values of 2.0 mm vs 2.5 and 3.0 mm for the wall thickness. The mechanical properties between these last two thicknesses do not present significant differences, so it is suggested that parts manufactured with PA 12 by SLS with thicknesses of 2.5 mm could have the same tensile mechanical properties as those of 3.0 mm. The horizontal and transverse directions with a 2.5 -3.0 mm thickness showed the highest mechanical properties with an ultimate tensile stress of ≈43 MPa, a modulus of elasticity of 2.2 GPa, an elongation at break of 16-18% and a hardness of ≈75 Shore D.

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Section: Introductionmentioning

confidence: 99%

Mechanical properties of polyamide 12 manufactured by means of SLS: Influence of wall thickness and build direction

Rodríguez,

Mora,

Velasco

et al. 2023

Mater. Res. Express

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“…Dadbakhsh et al [ 6 ] investigated the effect of raw and used PA12 powder on the coalescence fusing behavior, crystallinity, microstructure, and mechanical properties. Mehdipour et al [ 7 ] investigated the orientation and rate dependent mechanical behaviors under tensile tests. Balemans et al [ 8 ] developed a numerical model based on the finite element method to solve the flow, temperature, and crystallization kinetics of PA12 powder in SLS.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Tribological Properties of 3D Printed Polyamide 12 and SiC/PA12 Composite by Selective Laser Sintering

et al. 2022

Polymers

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Polymeric matrix composites are important to the advancement of industries such as the automobile and medicine industries. In this study, the silicon carbide (SiC) particle-reinforced polyamide12 (PA12) matrix composites were fabricated by selective laser sintering system as well as the pure PA12. The surface topographies, mechanical, and tribological properties were further examined. The results indicated that the friction and wear resistance of the composite were improved compared with the PA12 matrix. The compressive strength increased about 8.5%, shore D hardness increased about 6%. The friction coefficient decreased about 10%, the specific wear rate decreased 20% after adding silicon carbide 10% weight to PA12. The wear mechanisms were also discussed. The deformed asperities on the worn surface can withstand more tangential load, and therefore resulted in lower specific wear rate. It was found that the content of SiC particles on the surface were reduced after friction tests. According to the analysis of SEM, EDS, and FTIR results, the wear mechanisms were considered to be the abrasive and fatigue mode. This type of PA12 matrix composite might be a promising potential in marine and energy applications.

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“…• HP Jet Fusion 5200 Series 3D Printer: This printer uses Multi Jet Fusion technology to print objects with a range of properties, including color, texture, and conductivity [41], [42]. The printer can also be used to print objects that change shape or properties over time in response to specific stimuli.…”

Section: E 4d Printer Used In Healthcarementioning

confidence: 99%

Revolutionizing Healthcare with 3D/ 4D Printing and Smart Materials

Ibanga

Bamidele

Romero

et al. 2023

ESL

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3D printing technology has revolutionized the way products are manufactured, and it has opened up new possibilities in the field of smart materials. Smart materials are materials that can change their properties in response to external stimuli, such as temperature, pressure, or light. By combining 3D printing technology with smart materials, highly customizable and responsive products are created. The addition of the time dimension to 3D printing has introduced 4D printing technology, which has gained considerable attention in different fields such as medical, art, and engineering. To bridge the gap in knowledge of 4D, this paper assessed the revolution in healthcare with 3D/4D printing and smart materials. Data was generated as part of a broader empirical study which sought to explore healthcare personnel and electrical engineers’ perception on the practices around the use of 3D/4D printing technology and smart materials. The main method used was structured interviews. 12 participant were purposively selected and interviewed including healthcare personnel and electrical engineers form Philippines and Nigeria. The findings reveal an array of activities undertaken using both 3D and 4D. Furthermore, the study revealed that 4D printing is a new generation of 3D printing. Another aspect of the 3D usage is the integration of electrical stimulation and smart implant as a new area of study in healthcare. 3D could also be used to monitoring the smart implant performance. The study also evaluate the possibility of using Internet of things (IoT) in the smart implant as some device embeds smart materials. Smart implant commonly used includes orthopedic applications, such as knee and hip replacement, spine fusion, and fracture fixation. The smart materials used in this technology are important because 3D printing allows printed structures to be dynamic. The paper highpoints is that 4D printing has great potential for the future.

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Anisotropic and rate-dependent mechanical properties of 3D printed polyamide 12 - A comparison between selective laser sintering and multi jet fusion

Cited by 29 publications

References 6 publications

Mechanical properties of polyamide 12 manufactured by means of SLS: Influence of wall thickness and build direction

Mechanical properties of polyamide 12 manufactured by means of SLS: Influence of wall thickness and build direction

Mechanical and Tribological Properties of 3D Printed Polyamide 12 and SiC/PA12 Composite by Selective Laser Sintering

Revolutionizing Healthcare with 3D/ 4D Printing and Smart Materials

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