A transient updated Lagrangian finite element formulation for bond formation in fused deposition modeling process

The modelling of parachutes at Irvin Aerospace Inc. was based on the penalty Euler-Lagrange coupling method to compute the interaction between an Arbitrary Lagrange Euler formulation for the air flow and an updated Lagrangian finite element formulation for the canopy dynamics. This approach did not permit the effect of fabric porosity to be accounted for. In this paper, a new porosity Euler-Lagrange coupling models the fabric permeability by assessing the interaction forces based on the Ergun porous flow model. This paper provides validations for the technique when considering parachute applications and discusses the interest of this development to the parachute designer.

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A reverse updated Lagrangian finite element formulation for determining material properties from measured force and displacement data

Computational Mechanics ◽

10.1007/s00466-014-1064-7 ◽

2014 ◽

Vol 54 (6) ◽

pp. 1375-1394 ◽

Cited By ~ 2

Author(s):

M. Tartibi ◽

D. J. Steigmann ◽

K. Komvopoulos

Keyword(s):

Finite Element ◽

Material Properties ◽

Finite Element Formulation ◽

Element Formulation ◽

Lagrangian Finite Element ◽

Measured Force ◽

Updated Lagrangian

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An updated Lagrangian finite element formulation for large displacement dynamic analysis of three-dimensional flexible riser structures

Ocean Engineering ◽

10.1016/j.oceaneng.2011.02.001 ◽

2011 ◽

Vol 38 (5-6) ◽

pp. 793-803 ◽

Cited By ~ 17

Author(s):

S.A. Hosseini Kordkheili ◽

H. Bahai ◽

M. Mirtaheri

Keyword(s):

Finite Element ◽

Dynamic Analysis ◽

Three Dimensional ◽

Large Displacement ◽

Finite Element Formulation ◽

Element Formulation ◽

Flexible Riser ◽

Lagrangian Finite Element ◽

Updated Lagrangian

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Modeling of Bond Formation Between Polymer Filaments in the Fused Deposition Modeling Process

Journal of Manufacturing Processes ◽

10.1016/s1526-6125(04)70071-7 ◽

2004 ◽

Vol 6 (2) ◽

pp. 170-178 ◽

Cited By ~ 264

Author(s):

Céline Bellehumeur ◽

Longmei Li ◽

Qian Sun ◽

Peihua Gu

Keyword(s):

Fused Deposition Modeling ◽

Bond Formation ◽

Fused Deposition ◽

Modeling Process ◽

Deposition Modeling

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Numerical prediction of the distribution of black carbon in a street canyon using a semi-Lagrangian finite element formulation

Building and Environment ◽

10.1016/j.buildenv.2021.107910 ◽

2021 ◽

pp. 107910

Author(s):

Albert Puigferrat ◽

Ignasi de-Pouplana ◽

Fulvio Amato ◽

Eugenio Oñate

Keyword(s):

Finite Element ◽

Black Carbon ◽

Street Canyon ◽

Numerical Prediction ◽

Finite Element Formulation ◽

Element Formulation ◽

Lagrangian Finite Element

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An improved fused deposition modeling process for forming large-size thin-walled parts

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2016.04.005 ◽

2016 ◽

Vol 234 ◽

pp. 332-341 ◽

Cited By ~ 40

Author(s):

Jun Du ◽

Zhengying Wei ◽

Xin Wang ◽

Jijie Wang ◽

Zhen Chen

Keyword(s):

Fused Deposition Modeling ◽

Fused Deposition ◽

Modeling Process ◽

Large Size ◽

Deposition Modeling ◽

Thin Walled

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Fracture assessment of polycarbonate parts produced by fused deposition modeling in the out-of-plane printing direction – effect of raster angle

Rapid Prototyping Journal ◽

10.1108/rpj-08-2020-0191 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Iman Sedighi ◽

Majid R. Ayatollahi ◽

Bahador Bahrami ◽

Marco A. Pérez-Martínez ◽

Andrés A. Garcia-Granada

Keyword(s):

Fracture Toughness ◽

Finite Element ◽

Fracture Behavior ◽

Fused Deposition Modeling ◽

Mode I ◽

Content Type ◽

Fused Deposition ◽

Out Of Plane ◽

Deposition Modeling ◽

Fracture Tests

Purpose The purpose of this paper is to study the Mode I fracture behavior of polycarbonate (PC) parts produced using fused deposition modeling (FDM). The focus of this study is on samples printed along the out-of-plane direction with different raster angles. Design/methodology/approach Tensile and Mode I fracture tests were conducted. Semi-circular bend specimens were used for the fracture tests, which were printed in four different raster patterns of (0/90), (15/−75) (30/−60) and (45/−45). Moreover, the finite element method (FEM) was used to determine the applicability of linear elastic fracture mechanics (LEFM) for the printed PC parts. The fracture toughness results, as well as the fracture path and the fracture surfaces, were studied to describe the fracture behavior of the samples. Findings Finite element results confirm that the use of LEFM is allowed for the tested PC samples. The fracture toughness results show that changing the direction of the printed rasters can have an effect of up to 50% on the fracture toughness of the printed parts, with the (+45/−45) and (0/90) orientations having the highest and lowest resistance to crack propagation, respectively. Moreover, except for the (0/90) orientation, the other samples have higher crack resistance compared to the bulk material. The fracture toughness of the tested PC depends more on the toughness of the printed sample, rather than its tensile strength. Originality/value The toughness and the energy absorption capability of the printed samples (with different raster patterns) were identified as the main properties affecting the fracture toughness of the AM PC parts. Because the fracture resistance of almost all the samples was higher than that of the base material, it is evident that by choosing the right raster patterns for 3D-printed parts, very high resistance to crack growth may be obtained. Also, using FEM and comparing the size of the plastic zones, it was concluded that, although the tensile curves show nonlinearity, LEFM is still applicable for the printed parts.

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