Preferred orientation of chopped fibers in polymer‐based composites processed by selective laser sintering and fused deposition modeling: Effects on mechanical properties

2020 ◽  
Vol 137 (38) ◽  
pp. 49152 ◽  
Author(s):  
Claudio Badini ◽  
Elisa Padovano ◽  
Rosario De Camillis ◽  
Vito Guido Lambertini ◽  
Mario Pietroluongo
Keyword(s):  
Mechanical Properties ◽  
Fused Deposition Modeling ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Preferred Orientation ◽  
Fused Deposition ◽  
Deposition Modeling

scholarly journals USE OF FUSED DEPOSITION MODELING PROCESS IN INVESTMENT PRECISION CASTING AND RISK OF USING SELECTIVE LASER SINTERING PROCESS

2012 ◽  
pp. 226-230
Author(s):  
SIVADASAN M ◽  
N.K SINGH ◽  
ANOOP KUMAR SOOD
Keyword(s):  
Fused Deposition Modeling ◽  
Selective Laser Sintering ◽  
Thermal Response ◽  
Acrylonitrile Butadiene Styrene ◽  
Laser Sintering ◽  
Precision Casting ◽  
Fused Deposition ◽  
Rp Process ◽  
Deposition Modeling ◽  
Metallic Parts

Investment Castings (IC) is one of the most economical ways to produce intricate metallic parts when forging, forming and other casting processes tend to fail. However, high tooling cost and long lead time associated with the fabrication of metal moulds for producing IC wax (sacrificial) patterns result in cost justification problems for customized single casting or small-lot production. Generating pattern using rapid prototyping (RP) process may be one of the feasible alternatives. For this purpose present study assessed the suitability of the fused deposition modeling (FDM) process for creating sacrificial IC patterns by studying FDM fabricated part thermal response at various temperatures. A series of experiments with RP patterns are conducted and a set of test castings are also made in steel for establishing feasibility. The build material used is acrylonitrile butadiene styrene (ABS). As an annexe to this work a concurrent attempt is also made to quantify the risk in using Selective Laser Sintering patterns for Investment Castings. Authors hope this work might establish applicability of ABS in IC and also lead the investigations to theoretically tone down the shell cracking tendency with Selective Laser Sintering patterns when Proprietary Duraform is used as the build material.

scholarly journals Additive Manufacturing: A next gen fabrication

2018 ◽  
Vol 8 (01) ◽  
Author(s):  
Prajakta Subhedar
Keyword(s):  
Rapid Prototyping ◽  
Fused Deposition Modeling ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Consumer Products ◽  
Cad Model ◽  
Final Model ◽  
Fused Deposition ◽  
Layer Manufacturing ◽  
Deposition Modeling

A class of technologies referring to Rapid Prototyping (RP) or Additive or Layer Manufacturing or 3D Printing allows designers to quickly create tangible prototype instead of using two dimensional pictures. This technology produces models and prototype parts from 3D CAD model data created from 3D object digitizing systems. Rapid Prototyping forms parts by joining together liquid, powder or sheet materials. Physical models are built using three basic stages: pre-processing, building, post-processing. Pre-processing consists of generation of CAD model, convert into STL format and slice the STL files into cross sectional layers. In building process, construction of model takes place one layer atop another. Post process consists of cleaning and finishing the final model. Common types of Rapid Prototyping technologies popular in industry are: Steriolithography, Fused Deposition Modeling, Selective Laser Sintering, Laminated Object Manufacturing,3 D Printing. The selection of the processes depends upon the material to be cured to build the final model. Rapid Prototyping technologies are used in various industries like Automobiles, Consumer products, Medical, Academics, Aerospace, Government and Military. This poster talks about few challenges to be considered in Rapid Prototyping like shrinkage and distortion of final model, mechanical performance of RP model and limitations to mass quantity. : Layer Manufacturing, CAD Model, STL format, Steriolithography, Fused Deposition Modeling, Selective Laser Sintering.

scholarly journals МЕТОД СОЗДАНИЯ МОДЕЛЕЙ САМОЛЕТОВ С ПОМОЩЬЮ СИСТЕМ CAD/CAM/CAE И АДДИТИВНЫХ ТЕХНОЛОГИЙ

2018 ◽  
pp. 24-34
Author(s):  
Ю. Б. Витязев ◽  
А. Г. Гребеников ◽  
А. М. Гуменный ◽  
А. М. Ивасенко ◽  
А. А. Соболев
Keyword(s):  
Additive Manufacturing ◽  
Fused Deposition Modeling ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Additive Technologies ◽  
Direct Metal Laser Sintering ◽  
Fused Deposition ◽  
Cad Cam ◽  
Deposition Modeling ◽  
Laser Stereolithography

The analysis of the most applicable in mechanical engineering additive technologies (fused deposition modeling, selective laser sintering, laser stereolithography, direct metal laser sintering) have been performed. Method of creating airplane models using CAD/CAM/CAE systems and additive manufacturing is presented. The results of the application of selective laser sintering and fused deposition modeling for the manufacture of training aircraft models are considered.

Comparative Analysis of Different Methods of Rapid Tooling

2005 ◽  
Vol 475-479 ◽  
pp. 2873-2876
Author(s):  
Charles Martin ◽  
J.V. Sasutil ◽  
M. Kouhkan ◽  
E. Lorea ◽  
Rafiq Noorani
Keyword(s):  
Surface Roughness ◽  
Fused Deposition Modeling ◽  
Selective Laser Sintering ◽  
Dimensional Accuracy ◽  
Laser Sintering ◽  
Rapid Tooling ◽  
Composite Manufacturing ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Overall Performance

The purpose of this experiment was to compare different techniques that help improve conventional tooling. The methods investigated were chosen from both the methods of Rapid Tooling: direct and indirect. Six different methods were selected including, Sand Casting, Investment Casting, Fused Deposition Modeling (FDM), Direct Composite Manufacturing (DCM), Selective Laser Sintering (SLS), and Stereolithography (SLA). Several industrial corporations were contacted to help complete all six tests. Five parameters were selected for the comparison of these samples: dimensional accuracy, tensile strength, surface roughness, time for completion, and weight. Through comparison the strengths and weaknesses of each method was determined. It was found that different methods did better in various parameters. However, Selective Laser Sintering (SLS) seemed to have the best overall performance.

An Update on the Use of Alginate in Additive Biofabrication Techniques

2019 ◽  
Vol 25 (11) ◽  
pp. 1249-1264 ◽  
Author(s):  
Amoljit Singh Gill ◽  
Parneet Kaur Deol ◽  
Indu Pal Kaur
Keyword(s):  
Fused Deposition Modeling ◽  
Low Cost ◽  
Selective Laser Sintering ◽  
Layer By Layer ◽  
Three Dimension ◽  
Anionic Polymer ◽  
Fused Deposition ◽  
The Status ◽  
Deposition Modeling ◽  
Extrusion Printing

Background: Solid free forming (SFF) technique also called additive manufacturing process is immensely popular for biofabrication owing to its high accuracy, precision and reproducibility. Method: SFF techniques like stereolithography, selective laser sintering, fused deposition modeling, extrusion printing, and inkjet printing create three dimension (3D) structures by layer by layer processing of the material. To achieve desirable results, selection of the appropriate technique is an important aspect and it is based on the nature of biomaterial or bioink to be processed. Result & Conclusion: Alginate is a commonly employed bioink in biofabrication process, attributable to its nontoxic, biodegradable and biocompatible nature; low cost; and tendency to form hydrogel under mild conditions. Furthermore, control on its rheological properties like viscosity and shear thinning, makes this natural anionic polymer an appropriate candidate for many of the SFF techniques. It is endeavoured in the present review to highlight the status of alginate as bioink in various SFF techniques.

Synthesis and properties of modified PBT for FDM

2017 ◽  
Vol 23 (4) ◽  
pp. 804-810 ◽  
Author(s):  
Shiqing Cao ◽  
Dandan Yu ◽  
Weilan Xue ◽  
Zuoxiang Zeng ◽  
Wanyu Zhu
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Fused Deposition Modeling ◽  
Complex Structure ◽  
Three Dimensional ◽  
Sebacic Acid ◽  
Wire Drawing ◽  
Content Type ◽  
Fused Deposition ◽  
Deposition Modeling

Purpose The purpose of this paper is to prepare a new modified polybutylene terephalate (MPBT) for fused deposition modeling (FDM) to increase the variety of materials compatible with printing. And the printing materials can be used to print components with a complex structure and functional mechanical parts. Design/methodology/approach The MPBT, poly(butylene terephalate-co-isophthalate-co-sebacate) (PBTIS), was prepared for FDM by direct esterification and subsequent polycondensation using terephthalic acid (PTA), isophthalic acid (PIA), sebacic acid (SA) and 1,4-butanediol (BDO). The effects of the content of PIA (20-40 mol%) on the mechanical properties of PBTIS were investigated when the mole per cent of SA (αSA) is zero. The effects of αSA (0-7mol%) on the thermal, rheological and mechanical properties of PBTIS were investigated at nPTA/nPIA = 7/3. A desktop wire drawing and extruding machine was used to fabricate the filaments, whose printability and anisotropy were tested by three-dimensional (3D) printing experiments. Findings A candidate content of PIA introducing into PBT was obtained to be about 30 per cent, and the Izod notched impact strength of PBTIS increased with the increase of αSA. The results showed that the PBTIS (nPTA/nPIA = 7/3, αSA = 3-5mol%) is suitable for FDM. Originality/value New printing materials with good Izod notched impact strength were obtained by introducing PIA and SA (nPTA/nPIA = 7/3, αSA = 3-5 mol%) into PBT and their anisotropy are better than that of ABS.

Assessing the effect of FDM processing parameters on mechanical properties of PLA parts using Taguchi method

2021 ◽  
pp. 089270572110530
Author(s):  
Nagarjuna Maguluri ◽  
Gamini Suresh ◽  
K Venkata Rao
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Fused Deposition Modeling ◽  
Fracture Strain ◽  
Processing Parameters ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Nozzle Temperature ◽  
Experimental Runs ◽  
Printing Speed

Fused deposition modeling (FDM) is a fast-expanding additive manufacturing technique for fabricating various polymer components in engineering and medical applications. The mechanical properties of components printed with the FDM method are influenced by several process parameters. In the current work, the influence of nozzle temperature, infill density, and printing speed on the tensile properties of specimens printed using polylactic acid (PLA) filament was investigated. With an objective to achieve better tensile properties including elastic modulus, tensile strength, and fracture strain; Taguchi L8 array has been used for framing experimental runs, and eight experiments were conducted. The results demonstrate that the nozzle temperature significantly influences the tensile properties of the FDM printed PLA products followed by infill density. The optimum processing parameters were determined for the FDM printed PLA material at a nozzle temperature of 220°C, infill density of 100%, and printing speed of 20 mm/s.

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