scholarly journals Experimental and numerical analysis of 3D printed open-hole plates reinforced with carbon fibers

2020 ◽  
Vol 2 ◽  
pp. 100007
Author(s):  
E. Zappino ◽  
M. Filippi ◽  
A. Pagani ◽  
M. Petiti ◽  
E. Carrera
Keyword(s):  
Numerical Analysis ◽  
Carbon Fibers ◽  
Open Hole ◽  
3D Printed

scholarly journals Experimental and numerical analysis of compression behaviour of 3D printed metal foams

2020 ◽  
Vol 1706 ◽  
pp. 012213
Author(s):  
R Ramesh ◽  
A S Prasanth ◽  
R Krishna ◽  
K KoushikSundaram ◽  
R Arul MozhiSelvan ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Metal Foams ◽  
Compression Behaviour ◽  
3D Printed

Experimental and numerical analysis of bolt-loaded open-hole laminates reinforced by winded carbon rovings

2016 ◽  
Vol 141 ◽  
pp. 194-202 ◽  
Author(s):  
Tim Botzkowski ◽  
Siegfried Galkin ◽  
Sebastian Wagner ◽  
Sebastian P. Sikora ◽  
Luise Kärger
Keyword(s):  
Numerical Analysis ◽  
Open Hole

Numerical analysis of mechanical properties of 3D printed aluminium components with variable core infill values

2020 ◽  
Vol 1 (103) ◽  
pp. 16-24
Author(s):  
P. Baras ◽  
J. Sawicki
Keyword(s):  
Numerical Analysis ◽  
Mechanical Strength ◽  
Reference Model ◽  
Reaction Force ◽  
Solid Material ◽  
Solid Core ◽  
Compression Tests ◽  
Element Analysis ◽  
Static Compression ◽  
3D Printed

Purpose: The purpose of this paper is to present numerical modelling results for 3D-printed aluminium components with different variable core infill values. Information published in this paper will guide engineers when designing the components with core infill regions. Design/methodology/approach: During this study 3 different core types (Gyroid, Schwarz P and Schwarz D) and different combinations of their parameters were examined numerically, using FEM by means of the software ANSYS Workbench 2019 R2. Influence of core type as well as its parameters on 3D printed components strength was studied. The “best” core type with the “best” combination of parameters was chosen. Findings: Results obtained from the numerical static compression tests distinctly showed that component strength is highly influenced by the type infill choice selected. Specifically, infill parameters and the coefficient (force reaction/volumetric percentage solid material) were investigated. Resulting total reaction force and percentage of solid material in the component were compared to the fully solid reference model. Research limitations/implications: Based on the Finite Element Analysis carried out in this work, it was found that results highlighted the optimal infill condition defined as the lowest amount of material theoretically used, whilst assuring sufficient mechanical strength. The best results were obtained by Schwarz D core type samples. Practical implications: In the case of the aviation or automotive industry, very high strength of manufactured elements along with a simultaneous reduction of their wight is extremely important. As the viability of additively manufactured parts continues to increase, traditionally manufactured components are continually being replaced with 3D-printed components. The parts produced by additive manufacturing do not have the solid core, they are rather filled with specific geometrical patterns. The reason of such operation is to save the material and, in this way, also weight. Originality/value: The conducted numerical analysis allowed to determine the most favourable parameters for optimal core infill configurations for aluminium 3D printed parts, taking into account the lowest amount of material theoretically used, whilst assuring sufficient mechanical strength.

3D Printed Composites With Continuous Carbon Fiber Reinforcements

2017 ◽  
Author(s):  
Ali N. Sarvestani ◽  
Nekoda van de Werken ◽  
Pouria Khanbolouki ◽  
Mehran Tehrani
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
High Performance ◽  
Mechanical Response ◽  
Failure Mechanisms ◽  
Micro Structure ◽  
Design Rules ◽  
Continuous Carbon Fiber ◽  
Fiber Reinforcements ◽  
3D Printed

Additively manufactured polymers can be reinforced with high-performance reinforcements such as carbon fibers. Printed thermoplastics with embedded continuous carbon fibers are up to two orders of magnitude stronger and stiffer than high-grade 3D printed polymers. In this work, the mechanical response of such 3D printed carbon fiber specimens is evaluated. While the precursor carbon fiber reinforced filaments achieve a stiffness of 50GPa and strength 700MPa, mechanical properties of their printed parts are highly affected by printed carbon fiber curvatures. In this work, the structure of 3D printed parts was examined, and some design rules for 3D printing with continuous carbon fibers are suggested. Moreover, failure mechanisms in these samples are discussed and correlated to the micro-structure of the composites and the carbon fiber configuration.

Delamination analysis of 3D-printed nylon reinforced with continuous carbon fibers

2021 ◽  
pp. 102144
Author(s):  
E. Polyzos ◽  
A. Katalagarianakis ◽  
D. Van Hemelrijck ◽  
L. Pyl
Keyword(s):  
Carbon Fibers ◽  
3D Printed

Numerical Analysis of Laser Shock Peening as a Process for Generation of Compressive Residual Stresses in Open Hole Specimens

2011 ◽  
Vol 681 ◽  
pp. 267-272 ◽  
Author(s):  
Goran Ivetic ◽  
Ivan Meneghin ◽  
Enrico Troiani
Keyword(s):  
Fatigue Crack ◽  
Numerical Analysis ◽  
Residual Stresses ◽  
Crack Nucleation ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Fatigue Crack Nucleation ◽  
Open Hole ◽  
Shock Peening ◽  
Compressive Residual Stresses

A numerical analysis of Laser Shock Peening (LSP) process is illustrated, applied to an open hole specimen. This specimen is representative of a section of an aircraft fuselage lap joint, typically prone to fatigue crack nucleation at the rivet holes. The effect of the residual stress field induced by LSP on the fatigue life of open hole specimens is investigated. The results show that significant compressive residual stresses can be introduced in fatigue sensitive areas using LSP, postponing fatigue crack nucleation.

scholarly journals 3D Printed Hollow Off-Axis Profiles Based on Carbon Fiber-Reinforced Polymers: Mechanical Testing and Finite Element Method Analysis

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2949
Author(s):  
Martina Kalova ◽  
Sona Rusnakova ◽  
David Krzikalla ◽  
Jakub Mesicek ◽  
Radek Tomasek ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Carbon Fibers ◽  
Fem Analysis ◽  
Critical Force ◽  
Fiber Reinforced Polymers ◽  
Fused Deposition ◽  
3D Printed ◽  
Buckling Test ◽  
Element Method

The aim of the paper is to design, manufacture, and test an off-axis composite profile of circular cross-section. Composite profile based on continuous carbon fibers reinforcing the onyx matrix, i.e., a matrix that consists of nylon and micro carbon fibers, was produced by fused deposition modeling (FDM) method. A buckling test of the six printed composite specimens was performed on a tensile test machine. The values of the experiment were compared with the values of the computational simulation using the Finite Element Method (FEM) analysis. The mean value of the experimentally determined critical force at which the composite profile failed was 3102 N, while the value of the critical force by FEM analysis was calculated to be 2879 N. Thus, reliability of the simulation to determine the critical force differed from the experimental procedure by only 7%. FEM analysis revealed that the primary failure of 3D printed composite parts was not due to loss of stability, but due to material failure. With great accuracy, the results of the comparison show that it is possible to predict the mechanical properties of 3D printed composite laminates on the basis of a theoretical model.

Numerical Analysis of Optimal Design Parameters for a Cell Co-Culture Microfluidic Platform With an Integrated Pressure-Controlled Valve

2020 ◽  
Author(s):  
Saif Mohammad Ishraq Bari ◽  
Louis G. Reis ◽  
Thomas Holland ◽  
Gergana G. Nestorova
Keyword(s):  
Numerical Analysis ◽  
Optimal Design ◽  
Vertical Direction ◽  
Design Parameters ◽  
Adjacent Cell ◽  
Membrane Thickness ◽  
A Cell ◽  
3D Printed ◽  
The Individual ◽  
Pressure Controlled

Abstract This study reports the design, fabrication, and a two-dimensional numerical analysis to identify the optimal operating parameters of a novel microfluidic co-culture platform with an integrated pressure-controlled valve. Replica molding using 3D printed PDMS molds were used for the fabrication of the individual components of the device. Alternation of the position of the PDMS hydraulic valve permits individual manipulation of the cellular microenvironment of the two adjacent cell culture chambers (27.5 mm × 35 mm × 10 mm). The mathematical model analyzes the deflection profile of the valve in the vertical direction as a function of several parameters: valve thicknesses, the pressure exerted by the fluid inside the pressure chamber, and PDMS elasticity determined by the ratio of the elastomer base and the curing reagent. The valve understudy requires a deflection of 0.5 mm to completely isolate the two cell chambers. The combination of the optimal design parameters is identified using numerical analysis. Mathematical simulations show that the deflection of the membrane is inversely proportional to the valve membrane thickness and directly proportional to the pressure exerted by the fluid on the valve.

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