Comparative between FEM Models for FDM Parts and their Approach to a Real Mechanical Behaviour

Martínez, Javier Martínez; Diéguez, José Luis Rodríguez; Ares, E.; Pereira, Alejandro; Hernández, P.; Pérez, José Antonio

doi:10.1016/j.proeng.2013.08.230

Cited by 59 publications

(33 citation statements)

References 8 publications

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“…Sood et al [80] have developed a semi-empirical methodology using neural network algorithms to develop a model that would predict the compressive strength of FDM built parts. Martinez et al [77] have used a methodology usually applied to fibrous composite materials for the characterization of parts built by FDM using FEA. Anitha et al [58] focused on optimizing the FDM process surface quality.…”

Section: Extrusion Processesmentioning

confidence: 99%

Additive manufacturing methods and modelling approaches: a critical review

Bikas

Stavropoulos

Chryssolouris

2015

Int J Adv Manuf Technol

1,129

443

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Additive manufacturing is a technology rapidly expanding on a number of industrial sectors. It provides design freedom and environmental/ecological advantages. It transforms essentially design files to fully functional products. However, it is still hampered by low productivity, poor quality and uncertainty of final part mechanical properties. The root cause of undesired effects lies in the control aspects of the process. Optimization is difficult due to limited modelling approaches. Physical phenomena associated with additive manufacturing processes are complex, including melting/ solidification and vaporization, heat and mass transfer etc. The goal of the current study is to map available additive manufacturing methods based on their process mechanisms, review modelling approaches based on modelling methods and identify research gaps. Later sections of the study review implications for closed-loop control of the process.

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Section: Extrusion Processesmentioning

confidence: 99%

Additive manufacturing methods and modelling approaches: a critical review

Bikas

Stavropoulos

Chryssolouris

2015

Int J Adv Manuf Technol

1,129

443

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“…Accordingly, finite element method (FEM) is used to overcome this deficiency by predicting the mechanical response of FDM parts before fabrication (Martínez et al, 2013) causing the reduction of the final fabrication cost by decreasing the required experimental measurements (Liu and Zheng, 2010). Also, if the mechanical behavior of bulk material of tissue scaffolds are identified, then with the assistance of FEM, it is possible to predict the behavior of complex formations such as mechanical response at microscopic level during the cell differentiation (Sahai et al, 2016).…”

Section: Figure 1 Schematic Diagram Of the Fdm Machinementioning

confidence: 99%

Numerical investigation of the mechanical properties of the additive manufactured bone scaffolds fabricated by FDM: The effect of layer penetration and post-heating

Naghieh

Karamooz-Ravari

Badrossamay

et al. 2016

Journal of the Mechanical Behavior of Biomedical Materials

125

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In recent years, thanks to additive manufacturing technology, researchers have gone towards the optimization of bone scaffolds for the bone reconstruction. Bone scaffolds should have appropriate biological as well as mechanical properties in order to play a decisive role in bone healing. Since the fabrication of scaffolds is time consuming and expensive, numerical methods are often utilized to simulate their mechanical properties in order to find a nearly optimum one. Finite element analysis is one of the most common numerical methods that is used in this regard. In this paper, a parametric finite element model is developed to assess the effects of layer adhesion on the mechanical properties of bone scaffolds. To be able to validate this model, some compression test specimens as well as bone scaffolds are fabricated with biocompatible and biodegradable poly lactic acid using fused deposition modeling. All these specimens are tested in compression and their elastic modulus is obtained. Using the material parameters of the compression test specimens, the finite element analysis of the bone scaffold is performed. The obtained elastic modulus is compared with experiment indicating a good agreement. Accordingly, the proposed finite element model is able to predict the mechanical behavior of fabricated bone scaffolds accurately. In addition, the effect of post-heating of bone scaffolds on their elastic modulus is investigated. The results demonstrate that the numerically predicted elastic modulus of scaffold is closer to experimental outcomes in comparison with as-build samples.

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“…Studies relating to vibrations in printer system have been relatively few and that there is no study focusing on the effects of vibration on product surface roughness. Several studies [12][13][14] carried out on vibration analysis for quantifying the printing parameter effects on the structural characteristics of fabricated products. Also, a study [15] presents vibration data obtained from printer table in terms of impact of mechanical behaviors on fabrication quality.…”

Section: Introductionmentioning

confidence: 99%

Investigation the Effect of 3d Printer System Vibrations on Surface Roughness of the Printed Products

Kam

Saruhan

İpekçi

2019

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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Additive Manufacturing (AM), widely known as three-dimensional (3D) printing, is the process that a product is fabricated layer by layer in Cartesian coordinate system. Fused Deposition Modelling (FDM) is the most used AM process for functional rapid prototyping and products reduces the time and material involved in manufacturing. The purpose of this study is to investigate the effects of 3D printer system vibrations on the surface roughness of fabricated products. Polyethyletherphthalate Glycol (PET-G) is used as material for fabrication. Six different filling structures -Rectilinear, Grid, Triangular, Wiggle, Fast Honeycomb, and Full Honeycomb -were used and for each structure two different top -two and three -layers implemented. A total of 12 samples specimens were fabricated. The results showed that using Full Honeycomb filling structure with three top layers is more suitable for surface roughness compare to the others filling structure used. It can be concluded that the vibration of 3D printer system considering type of filling structure and number of top layers have a significant effect on surface quality of product. ÖZETYaygın olarak üç boyutlu (3D) baskı olarak bilinen Eklemeli Üretim (Additive Manufacturing -AM), bir ürünün Kartezyen koordinat sisteminde katmanla üretildiği süreçtir. Erişim Birikim Modelleme (Fused Deposition Modeling -FDM), fonksiyonel hızlı prototipleme ve ürün için en çok kullanılan AM sürecidir, üretimle ilgili zamanı ve malzemeyi azaltır. Bu çalışmanın amacı, 3D yazıcı sistem titreşimlerinin, imal edilen ürünlerin yüzey pürüzlülüğü üzerindeki etkilerini araştırmaktır. Üretim için malzeme olarak Polietileterftalat Glikol (PET-G) kullanılmıştır. Altı farklı dolgu şekli -Rectilinear, Grid, Triangular, Wiggle, Fast Honeycomb ve Full Honeycomb -kullanılmış ve her yapı için iki farklı üst katmaniki ve üç katmanuygulanarak toplam 12 test numunesi basılmıştır. Basılan ürünlerin yüzey pürüzlülüğü ölçümleri yapılarak elde edilen veriler üzerinden karşılaştırma yapılmış ve sonuçlar analiz edilmiştir. Sonuçlar, üç üst katmanlı ızgara (Grid) doldurma yapısının kullanılması, yüzey pürüzlülüğü için diğer doldurma yapılarına kıyasla daha uygun olduğunu göstermiştir. Dolgu Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 7 (2019) 147-157 şekli türüne ve üst katmanların sayısına bağlı olarak 3D yazıcı sisteminin titreşiminin ürünün yüzey kalitesi üzerinde önemli bir etkisi olduğu görülmüştür.

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Comparative between FEM Models for FDM Parts and their Approach to a Real Mechanical Behaviour

Cited by 59 publications

References 8 publications

Additive manufacturing methods and modelling approaches: a critical review

Additive manufacturing methods and modelling approaches: a critical review

Numerical investigation of the mechanical properties of the additive manufactured bone scaffolds fabricated by FDM: The effect of layer penetration and post-heating

Investigation the Effect of 3d Printer System Vibrations on Surface Roughness of the Printed Products

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