Use of Fused Deposition Modeling Assisted Investment Casting for Developing Functionally Graded Material

2018 ◽  
pp. 559-587
Author(s):  
Rupinder Singh
Keyword(s):  
Functionally Graded Material ◽  
Investment Casting ◽  
Fused Deposition Modeling ◽  
Functionally Graded ◽  
Fused Deposition ◽  
Graded Material ◽  
Deposition Modeling

Characterization of Mechanical Property of PLA-ABS Functionally Graded Material Fabricated by Fused Deposition Modeling

2021 ◽  
Author(s):  
Ziyi Su ◽  
Kazuaki Inaba ◽  
Amit Karmakar ◽  
Apurba Das
Keyword(s):  
Tensile Test ◽  
Young’S Modulus ◽  
Natural Frequency ◽  
Functionally Graded Material ◽  
Fused Deposition Modeling ◽  
Young's Modulus ◽  
Functionally Graded ◽  
Fused Deposition ◽  
Graded Material ◽  
Deposition Modeling

Abstract Application of functionally graded materials (FGMs) in energy, aviation and nuclear industries has increased since the last decade due to potential reduction of in-plane and transverse through-the-thickness stresses, enhanced residual stress distribution, superior thermal properties, free from delamination, and reduced stress intensity factors. FGMs are categorized as an advanced class of composite materials where the two constituent materials are graded along the thickness direction. Absence of sharp change in material property in the interface layer eliminates the problem of delamination and debonding, which is a major concern for traditional composite material. In this work, PLA-ABS functionally graded material is manufactured using additive manufacturing techniques through fused deposition modeling (FDM) using Y-type extruder. X-ray computed tomography test is conducted to see the air void (generated during printing) distribution in the printed FGM. Tensile test (as per ISO-527standrad) is conducted to evaluate the Young’s Modulus of additive manufactured FGMs. Three different measuring positions are considered in the FGM specimens to check the effect of property change along the grading direction. Tensile test results of PLA-ABS FGM are compared with their individual constituents (ABS and PLA). Further, flexural vibration test is conducted to evaluate the natural frequency of printed FGM beam. Experimentally determined mechanical and dynamic characteristics in terms effective Young’s Modulus and natural frequency are analyzed and discussed.

Investigations for Mechanical Properties of Hybrid Investment Casting: A Case Study

2014 ◽  
Vol 808 ◽  
pp. 89-95 ◽  
Author(s):  
Parlad Kumar ◽  
Rupinder Singh ◽  
I.P.S. Ahuja
Keyword(s):  
Investment Casting ◽  
Fused Deposition Modeling ◽  
Dimensional Accuracy ◽  
Casting Process ◽  
Manufacturing Processes ◽  
Biomedical Implant ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Investment Casting Process

Conventional investment casting is one of the old manufacturing processes. It involves expensive tooling for making sacrificial wax patterns to make ceramic moulds. However, with the emergence of rapid prototyping technologies, now it is possible to make and use plastic patterns instead of wax patterns along with some advantages. In this paper, plastic patterns have been prepared by using fused deposition modeling and used for investment casting process. A case study has been discussed to make a biomedical implant by the hybridization of fused deposition modeling with investment casting. Dimensional accuracy, surface finish and hardness of the casted biomedical implants have been tested and reported.

scholarly journals 4D Printing Self-Morphing Structures

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1353 ◽  
Author(s):  
Mahdi Bodaghi ◽  
Reza Noroozi ◽  
Ali Zolfagharian ◽  
Mohamad Fotouhi ◽  
Saeed Norouzi
Keyword(s):  
Composite Structures ◽  
Fused Deposition Modeling ◽  
Functionally Graded ◽  
Complex Structures ◽  
Mechanical Behaviors ◽  
4D Printing ◽  
Digital Tool ◽  
Fused Deposition ◽  
Straightforward Method ◽  
Deposition Modeling

The main objective of this paper is to introduce complex structures with self-bending/morphing/rolling features fabricated by 4D printing technology, and replicate their thermo-mechanical behaviors using a simple computational tool. Fused deposition modeling (FDM) is implemented to fabricate adaptive composite structures with performance-driven functionality built directly into materials. Structural primitives with self-bending 1D-to-2D features are first developed by functionally graded 4D printing. They are then employed as actuation elements to design complex structures that show 2D-to-3D shape-shifting by self-bending/morphing. The effects of printing speed on the self-bending/morphing characteristics are investigated in detail. Thermo-mechanical behaviors of the 4D-printed structures are simulated by introducing a straightforward method into the commercial finite element (FE) software package of Abaqus that is much simpler than writing a user-defined material subroutine or an in-house FE code. The high accuracy of the proposed method is verified by a comparison study with experiments and numerical results obtained from an in-house FE solution. Finally, the developed digital tool is implemented to engineer several practical self-morphing/rolling structures.

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