Material Extrusion-Based Additive Manufacturing Process (ME-AMP) via Fused Filament Fabrication (FFF) offers a higher geometric flexibility than conventional technologies to fabricate thermoplastic lightweight sandwich structures. This study used polylactic acid/polyhydroxyalkanoate (PLA/PHA) biodegradable material and 3D printer manufacture structures with honeycomb, diamond-celled corrugated core shapes as single part. In this paper, compression, three-point bending tensile tests were...

ABSTRACT Three‐dimensional (3D) printing processes are nowadays leading the charge in transforming traditional art, engineering, and manufacturing processes. In this study, structural thermal behavior of commercially available filaments composed synthetic poly(acrylonitrile‐ co ‐butadiene‐ ‐styrene) thermoplastic as well poly(lactic acid) acid)/polyhydroxyalcanoate reinforced with bamboo ( Bambusa sp .) wood flour composite biothermoplastics were assessed by differential scanning calorimetry...

This paper discusses the structure morphology and thermal swelling behavior of physically crosslinked hydrogels, obtained from applying four successive freezing-thawing cycles to poly (vinyl alcohol) blended with various amounts κ-carrageenan. The addition carrageenan in a weight ratio 0.5 determines twofold increase degree early diffusion coefficients hydrogels when immersed distilled water, due decrease crystallinity polymer matrix. water into matrix could be considered as...

The paper studies the UV exposure influence on mechanical properties, crystalline, interface and morphology of optimised (previously water immersed) composites with wastes rubber, PET, HDPE, wood inorganic filler (CaO fly ash). strength, photo-degradation, crystalline structure surface morphologies changes are evaluated after their under simulated light compared to unexposed ones. Experimental results showed lead increase Young moduli, compressive strength tensile for high content PET...

The 3D printing process allows complex structures to be obtained with low environmental impact using biodegradable materials. This work aims develop and acoustically characterize 3D-printed panels three types of materials, each manufactured at five infill densities (20%, 40%, 60%, 80% 100%) internal configurations based on circular, triangular, corrugated profiles. highest absorption coefficient values (α = 0.93) were from the acoustic tests for polylactic acid material ground birch wood...

The additive processes used in the manufacture of components for unmanned aerial vehicles (UAVs), from composite filaments, have an important advantage compared to classical technologies. This study focused on three-dimensional design, preliminary aerodynamic analysis, fabrication and assembly thermoplastic extruded components, flight testing search-rescue performance UAV. UAV model was designed highest possible structural strength (the fuselage has a structure with stiffening frames wing is...

Additive Manufacturing (AM) technologies are getting more and strategic for different purposes in many industrial fields. Among the most outstanding part prototyping, single to small batch production, relatively reduced manufacturing times investments costs, material consumption, innovative efficient shapes. The considerable advantages these offer, compared subtractive ones, make additive a potentially industry-leading process almost all domains - from aeronautics medical industry. Under...

Fused Filament Fabrication (FFF) is one of the frequently used material extrusion (MEX) additive manufacturing processes due to its ability manufacture functional components with complex geometry, but their properties depend on process parameters. This paper focuses studying effects parameters, namely infill density (25%, 50%, 75%, and 100%), mechanical thermal response samples made poly(lactic acid) (PLA) reinforced short glass fibers (GF) produced using FFF process. To perform a...

Additive manufacturing (AM) is used in many fields and a method to replace wood components or wood-jointed furniture the industry. Replacing joints by 3D printed connectors would be an advantage, considering fact that during process of assembling furniture, execution technology difficult, time-consuming, labor-intensive. Advanced AM applied helps designers create new concepts product design, with no limits shape, number joints, color, size. The diversity printers technologies provides...

In three-dimensional (3D) printing, one of the main parameters influencing properties 3D-printed materials is infill density (ID). This paper presents influence ID on microstructure, mechanical, and thermal carbon fiber-reinforced composites, commercially available, manufactured by Fused Filament Fabrication (FFF) process. The samples were using FFF varying (25%, 50%, 75%, 100%) subjected to tensile tests, three-point bending, analyses Differential Scanning Calorimetry (DSC)...

ABSTRACT In this article, poly(vinyl chloride) (PVC) sandwich‐structured hybrid composites with amorphous calcium carbonate and wood‐filled cores were obtained by compression molding. It has been determined that wood addition up to a weight ratio of 33% reported the total filler amount is beneficial in improving both inter‐filler filler‐matrix interfacial adhesion, which alongside promoting PVC matrix crystallization responsible for an increase 34% flexural strength composites, compared...

This study concerns the use of fused filament fabrication technique to create models landing gear an unmanned aircraft. These components are made with short fibers (chopped fibers) carbon fiber and fiberglass. In order identify material high mechanical strength, designed were subjected a finite element analysis three-point bending test, followed by microscopic examination tested components. Following comparative study, both results test provided similar results, relative error 2%, which is...

Sound-absorbing panels are widely used in the acoustic design of aircraft parts, buildings and vehicles as well sound insulation absorption areas with heavy traffic. This paper studied properties sound-absorbing manufactured three nozzle diameters (0.4 mm, 0.6 mm 0.8 mm) by 3D printing from types polylactic acid filaments (Grey Tough PLA; Black PLA Pro; Natural PLA) six internal configurations labyrinthine zigzag channels (Z1 Z2). The coefficient sample Z2 pattern, a 5.33 height, diameter...

Sustainable building materials with excellent thermal stability and sound insulation are crucial for eco-friendly construction. This study investigates biocomposites made from cellulose pulp reinforced beeswax, fir resin, natural fillers like horsetail, rice flour, needles. Eight formulations were obtained, their resistance, oxidation temperature, acoustic properties evaluated. Biocomposites exhibited significant improvements compared to conventional materials. Oxidation temperature onset...

Additive manufacturing, through the process of thermoplastic extrusion filament, allows manufacture complex composite sandwich structures in a short time with low costs. This paper presents design and fabrication by Fused Filament Fabrication (FFF) fibers, having three core types C, Z, H, followed mechanical performance testing for compression bending points. Flatwise tests three-point have clearly indicated superior H-core due to dense structures. The main modes failure were analyzed...

Balsa wood is a natural cellular material with an excellent resistance-to-weight ratio that ideal for manufacturing the core of sandwich structures. In this study, specimens carbon-fiber-reinforced polymer (CFRP) skin and balsa were tested static dynamic loading. Three-point flexural tests in regime determined mechanical characteristics CFRP-balsa needed subsequent fatigue strength tests. Also, experimental research was performed on Charpy impact response specimens. This study implemented...

The utilization of polymer-based materials is quickly expanding. enterprises today are progressively seeking techniques to supplant metal parts with as a result their light weight, simple support and modest costs. ceaselessly developing requirement for composite new or enhanced properties brings about the preparation different polymer mixes various arrangements, morphologies properties. Fused filament fabrication processes such 3D-printing nowadays shaping actual pathway full pallet...

Selective laser technology is an additive that can allow for the manufacture of cellular structures using different types metallic powder with complex applications in industries such as aerospace, automotive and medical implant industries.This paper presents effect climate mechanical stresses on some honeycomb cores, used sandwich made 316L stainless steel by applying selective melting technology.The cores have undergone microhardness testing resulting variation obtained from analyzed...

In this paper is investigated the effect of building parts with different layer sizes using an additive manufacturing technique, from statistical point view. The focused on differences that appear at stainless steel when increased, being done SLM 250 HL machine. This machine uses a fiber laser to melt fine powder layer-by-layer basis create three-dimensional metallic CAD files. samples were constructed two thicknesses and then reprocess so micro hardness test could be employed. hardness’s...

In this study, lightweight sandwich structures with honeycomb cores are proposed and their mechanical properties investigated through experiments FEA (finite element analysis) simulation. Sandwich were fabricated out of Inconel 718 using selective laser melting technique two different topologies—sandwich perforated skin (SSPS) core (SSPC). addition, the effect homogenization heat treatment on samples subjected to compression microhardness tests was analyzed. Results showed significant...

The continuous development of modern industries rises the necessity for functionally graded materials. This research starts from consideration that incorporation SiC particles in molten aluminum alloy can be difficult due to very low wettability particles. In order increase their wettability, were covered with a layer metallic copper. into mass was performed by centrifugal casting. secondary hypoeutectic Al-Si used this study elaborated within crucible resistors heated furnace. coating...