Fabrication of Composite Structures via 3D Printing

2021 ◽  
pp. 255-276
Author(s):  
Madhukar Somireddy
Keyword(s):  
3D Printing ◽  
Composite Structures

Path-designed 3D printing for topological optimized continuous carbon fibre reinforced composite structures

2020 ◽  
Vol 182 ◽  
pp. 107612 ◽  
Author(s):  
Nanya Li ◽  
Guido Link ◽  
Ting Wang ◽  
Vasileios Ramopoulos ◽  
Dominik Neumaier ◽  
...  
Keyword(s):  
3D Printing ◽  
Carbon Fibre ◽  
Composite Structures ◽  
Reinforced Composite

A Modeling Method of Continuous Fiber Paths for Additive Manufacturing (3D Printing) of Variable Stiffness Composite Structures

2020 ◽  
Vol 27 (3) ◽  
pp. 185-208
Author(s):  
Andrei V. Malakhov ◽  
Alexander N. Polilov ◽  
Junkang Zhang ◽  
Zhanghao Hou ◽  
Xiaoyong Tian
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Composite Structures ◽  
Variable Stiffness ◽  
Modeling Method ◽  
Continuous Fiber

scholarly journals FEM analysis of long-fibre composite structures created by 3D printing

2019 ◽  
Vol 40 ◽  
pp. 792-799
Author(s):  
Jaroslav Majko ◽  
Milan Saga ◽  
Milan Vasko ◽  
Marian Handrik ◽  
Frantisek Barnik ◽  
...  
Keyword(s):  
3D Printing ◽  
Composite Structures ◽  
Fibre Composite ◽  
Fem Analysis

POROSITY OF COMPOSITE STRUCTURES BASED ON 3D-PRINTED FRAMES IMPREGNATED WITH EPOXY RESIN

2021 ◽  
Vol 1 (142) ◽  
pp. 131-139
Author(s):  
Yuliya A. Lopatina ◽  
◽  
Vyacheslav A. Denisov
Keyword(s):  
3D Printing ◽  
Epoxy Resin ◽  
Composite Structures ◽  
Epoxy Resins ◽  
Complex Shape ◽  
Complex Geometry ◽  
Research Purpose ◽  
Second Stage ◽  
3D Printed ◽  
The Cost

In the designs of modern machines, more and more polymer parts are used, at the same time, there is a problem of their quick replacement in case of failure. Reducing the cost and repair time can be achieved by using 3D printing by FDM method, but such parts do not always demonstrate the necessary strength. To improve their mechanical properties, a method of their impregnation after printing in epoxy resins was previously proposed. (Research purpose) The research purpose is in studying the dependence of the porosity of composite structures based on 3D-printed frames impregnated with resin on the parameters of their manufacture. (Materials and methods) Authors used samples for the first stage of the work, which are 3D-printed cylinders with different wall thicknesses and internal geometries, impregnated with ED-20 epoxy resin. The samples were cut in several sections and the number of pores in these sections was calculated. The second stage of the experiment was to evaluate the porosity of a part of complex geometry. (Results and discussion) With an increase in the percentage of filling and thickening of the wall in 3D printing, there is a tendency to reduce the number of pores. With a less dense filling of the frame and a thinner wall, the resin is worse retained in the product and partially flows out after impregnation. The best filling of a part of a complex shape was observed when it was cured in the position of the massive part up. (Conclusions) For the production of high- quality composite parts based on 3D-printed frames impregnated with epoxy resin, it is recommended to choose the largest possible percentage of filling during 3D printing and strive to position the part during the curing process after impregnation with the massive part up.

scholarly journals Osseointegration of porous apatite-wollastonite and poly(lactic acid) composite structures created using 3D printing techniques

2018 ◽  
Vol 90 ◽  
pp. 1-7 ◽  
Author(s):  
Ion Tcacencu ◽  
Natacha Rodrigues ◽  
Naif Alharbi ◽  
Matthew Benning ◽  
Sotiria Toumpaniari ◽  
...  
Keyword(s):  
Lactic Acid ◽  
3D Printing ◽  
Composite Structures ◽  
Poly Lactic Acid ◽  
Printing Techniques

Bimaterial 3D printing and numerical analysis of bio-inspired composite structures under in-plane and transverse loadings

2017 ◽  
Vol 108 ◽  
pp. 210-223 ◽  
Author(s):  
Phuong Tran ◽  
Tuan D. Ngo ◽  
Abdallah Ghazlan ◽  
David Hui
Keyword(s):  
Numerical Analysis ◽  
3D Printing ◽  
Composite Structures

scholarly journals 3D printing of mineral–polymer bone substitutes based on sodium alginate and calcium phosphate

2016 ◽  
Vol 7 ◽  
pp. 1794-1799 ◽  
Author(s):  
Aleksey A Egorov ◽  
Alexander Yu Fedotov ◽  
Anton V Mironov ◽  
Vladimir S Komlev ◽  
Vladimir K Popov ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Calcium Phosphate ◽  
3D Printing ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Sodium Alginate ◽  
Composite Structures ◽  
Bone Substitutes ◽  
Liquid Component ◽  
Inorganic Particles

We demonstrate a relatively simple route for three-dimensional (3D) printing of complex-shaped biocompatible structures based on sodium alginate and calcium phosphate (CP) for bone tissue engineering. The fabrication of 3D composite structures was performed through the synthesis of inorganic particles within a biopolymer macromolecular network during 3D printing process. The formation of a new CP phase was studied through X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. Both the phase composition and the diameter of the CP particles depend on the concentration of a liquid component (i.e., the “ink”). The 3D printed structures were fabricated and found to have large interconnected porous systems (mean diameter ≈800 μm) and were found to possess compressive strengths from 0.45 to 1.0 MPa. This new approach can be effectively applied for fabrication of biocompatible scaffolds for bone tissue engineering constructions.

scholarly journals Manufacturing of Isogrid Composite Structures by 3D Printing

2020 ◽  
Vol 47 ◽  
pp. 1096-1100 ◽  
Author(s):  
Archimede Forcellese ◽  
Valerio di Pompeo ◽  
Michela Simoncini ◽  
Alessio Vita
Keyword(s):  
3D Printing ◽  
Composite Structures

Free and Forced Vibration Characteristics of Axially Graded Multifunctional Viscoelastic Beams

2017 ◽  
Author(s):  
Mariona Heras Segura ◽  
Kumar Vikram Singh ◽  
Fazeel Khan
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Material Properties ◽  
Forced Vibration ◽  
Composite Structures ◽  
Spectral Characteristics ◽  
Polymeric Materials ◽  
Vibration Characteristics ◽  
Spatially Varying ◽  
Graded Structures

Variable performance characteristics in a multifunctional structure may be achieved by identifying suitable material candidates, and spatially varying, or grading, their material properties along the structures. Additive manufacturing (e.g. 3D printing) offers various possibilities to fabricate/manufacture such graded structures. The material properties of multifunctional composite structures, such as beams or plates, are often graded along their thickness (laminate/sandwich) or distributed in a material matrix (fibers/nanoparticles). In recent years, it has been demonstrated that by tailoring the materials in other directions (axially/radially), superior mechanical behavior and structural stability can be realized. In this research, the modeling and analyses of axially graded polymeric beams to maximize their vibration performance for a large bandwidth of frequencies and damping is presented. Polymeric materials have frequency and temperature dependent viscoelastic properties (complex modulus, glass transition temperature etc.) which can be leveraged for different applications. The goal is to spatially combine these materials such that desired longitudinal vibration characteristics (natural frequencies, damping and modes) can be achieved. To this end, the modeling for the free and forced vibration of beams with spatially varying properties, is carried out by a piecewise uniform continuous model. The spectral characteristics (natural frequency, damping ratios, and frequency response functions) of the axially graded beams are computed by solving associated transcendental eigenvalues problems. The parametric studies included the grading of polymers which are regularly used for additive manufacturing, such as ABS, PLA, etc. These results demonstrate that the response of the system can be manipulated by axial grading and optimal design/fabrication (3D printing) of multifunctional smart structures may be developed for vibration control applications.

scholarly journals Electromagnetic response from composite carbon-containing structures with technological inhomogeneities at EHF

2021 ◽  
Vol 2140 (1) ◽  
pp. 012010
Author(s):  
E A Trofimov ◽  
G E Kuleshov ◽  
V D Moskalenko ◽  
A V Badin ◽  
K V Dorozhkin
Keyword(s):  
3D Printing ◽  
Transmission Coefficient ◽  
Composite Structures ◽  
Electromagnetic Response ◽  
Frequency Range ◽  
Absorption Coefficients ◽  
Polymer Volume ◽  
Composite Carbon ◽  
Frequency Dependences

Abstract The results of studies of the electromagnetic response from composite structures made of a carbon-containing polymer with the inclusion of spherical pores in the bulk of the material and with pyramidal corrugation on the surface of the material are presented. The results of modeling the frequency dependences of the transmission, reflection and absorption coefficients in the EHF range are shown. Samples of composite carbon-containing structures with technological inhomogeneities have been fabricated by 3D printing. Measurements of the electromagnetic response from experimental samples were carried out in the frequency range from 100 to 1000 GHz. At frequencies up to 250 GHz, the inclusion of air pores in the polymer volume reduces the transmission coefficient, practically does not affect the reflection, and increases the absorption. Pyramid corrugated material absorbs more than 99% of radiation in the frequency range from 200 to 635 GHz.

Sign in / Sign up

Export Citation Format

Share Document