Review on characterization and impacts of the lattice structure in additive manufacturing

Nagesha, B.K.; Dhinakaran, V.; Shree, M. Varsha; Kumar, K. Suresh; Chalawadi, Damodar; Sathish, T.

doi:10.1016/j.matpr.2019.08.158

Cited by 162 publications

(45 citation statements)

References 37 publications

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“…The importance of lightweight structures in many fields of engineering has been well known for a long time [ 49 ]. The innovations in technological processes based on material addiction allow pushing the design towards challenging geometries and associated structural properties.…”

Section: Methodsmentioning

confidence: 99%

Experimental and Numerical Study on Withdrawal Strength of Different Types of Auxetic Dowels for Furniture Joints

2020

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Studies on the application of the auxetic metamaterials and structures in furniture joints are very limited. However, they have huge potential for use in ready-to-assemble furniture. This study aimed to design and produce different types of auxetic dowels in 3D printing technology, and experimentally and numerically analyze the withdrawal strength of these dowels. In the scope of the study, 24 auxetic dowels with different types and size of inclusions, a different diameter of holes, and a non-auxetic reference dowel were designed and produced with appropriate muffs. Dowels were 3D printed from polyamide (PA12). Poisson’s ratios, withdrawal strength, contact pressures, and friction coefficients of dowels were determined theoretically by means of numerical analyses and real static compression tests. After the pre-production of dowels, the dowels with triangular inclusions have not been found to have sufficient strength and stiffness. Withdrawal strength of dowels decreased as the size of inclusions is decreased, or dowel hole diameter is increased. Furthermore, contact pressures and stresses in auxetic dowels were considerably lower than non-auxetic dowels under the withdrawal force.

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Section: Methodsmentioning

confidence: 99%

Experimental and Numerical Study on Withdrawal Strength of Different Types of Auxetic Dowels for Furniture Joints

2020

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“…Additive manufacturing (AM) enables production of parts with complex geometries such as lattice structures [1]. Comprising a network of nodes and beams, or struts, lattice structures can dramatically reduce weight and retain structural integrity.…”

Section: Introductionmentioning

confidence: 99%

A non-destructive resonant acoustic testing and defect classification of additively manufactured lattice structures

et al. 2021

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Additive manufacturing enables the fabrication of lattice structures which are of particular interest to fabricate medical implants and lightweight aerospace parts. Product integrity is critical in these applications. This requests very challenging quality control for such complex geometries, particularly on detecting internal defects. It is important not only to detect whether there are missing struts for a product with a large size of lattices, but also to identify the number of missing struts for safety-critical applications. Resonant ultrasound spectroscopy is a promising method for fast and cost-effective non-destructive testing of complex geometries but data analytics methods are needed to systematically analyze resonant ultrasound signals for defect identification and classification. This study utilizes resonant acoustic method to obtain resonant frequency spectrum of test lattice structures. In addition, regularized linear discriminant analysis, combined with adaptive sampling and normalization, is developed to classify the number of missing struts. The result shows 80.95% testing accuracy on validation study, which suggests that the resonant acoustic method combined with machine learning is a powerful tool to inspect lattices.

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“…The behavior of a mechanical element when exposed to vibrations and the possibility of resonant frequency excitation within it can lead to serious problems in the design and operation of machines [ 24 ]. There are studies based on the vibration analysis of elements made with 3D printing technology [ 25 , 26 , 27 , 28 , 29 , 30 , 31 ]. Some of them focus on determining damping inside the material if oscillating motion occurs and make use of comparative analysis.…”

Section: Introductionmentioning

confidence: 99%

Single-Sensor Vibration-Scanning Method for Assessing the Mechanical Properties of 3D Printed Elements

Buchalik

Nowak

2021

Materials

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This paper considers issues related to the assessment of the mechanical properties of elements made with 3D printing technology. To enable experimental testing, an automated test stand was built to perform amplitude and phase angle measurements of any point of the specimen. A contactless, optical measurement method was selected, as it is especially adequate when it comes to elements with small dimensions and masses. One innovative element of the test stand is the original method of phase angle measurement using a single vibration sensor fitted with a system forcing and ensuring full measurement synchronization and dynamic state repeatability. Additionally, numerical models of tested objects were produced and simulations of their oscillations were performed. Based on that, the properties of the tested material (PLA) were considered, with a special focus on the density, elastic modulus, and damping. The analyses were conducted for a few elements with different dimensions at different vibration frequencies.

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Review on characterization and impacts of the lattice structure in additive manufacturing

Cited by 162 publications

References 37 publications

Experimental and Numerical Study on Withdrawal Strength of Different Types of Auxetic Dowels for Furniture Joints

Experimental and Numerical Study on Withdrawal Strength of Different Types of Auxetic Dowels for Furniture Joints

A non-destructive resonant acoustic testing and defect classification of additively manufactured lattice structures

Single-Sensor Vibration-Scanning Method for Assessing the Mechanical Properties of 3D Printed Elements

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