scholarly journals Case Study of a Functionally Graded Aluminum Part

2018 ◽  
Vol 8 (7) ◽  
pp. 1113 ◽  
Author(s):  
Elisa Fracchia ◽  
Silvia Lombardo ◽  
Mario Rosso
Keyword(s):  
Functionally Graded ◽  
Aluminum Part

scholarly journals Thermo-Elastic Analysis Of A Rotating Hollow Cylinder Made Of Arbitrary Functionally Graded Materials

2015 ◽  
Vol 45 (4) ◽  
pp. 41-60
Author(s):  
Mohammad Arefi ◽  
Iman Nahas ◽  
Majid Abedi
Keyword(s):  
Radial Displacement ◽  
Mechanical Analysis ◽  
Functionally Graded ◽  
Mechanical And Thermal Properties ◽  
Elastic Analysis ◽  
Graded Materials ◽  
Hollow Structures ◽  
Study Power ◽  
Rotating Hollow Cylinder

AbstractThermo-mechanical analysis of the functionally graded orthotropic rotating hollow structures, subjected to thermo-mechanical loadings is studied in this paper. The relations were derived for both plane strain and plane stress conditions as a cylinder and disk, respectively. Non homogeneity was considered arbitrary through thickness direction for all mechanical and thermal properties. The responses of the system including temperature distribution, radial displacement and radial and circumferential stresses were derived in the general state. As case study, power law gradation was assumed for functionally graded cylinder and the mentioned results were evaluated in terms of parameters of the system such as non-homogeneous index and angular velocity.

scholarly journals FUNCTIONALLY GRADED ADDITIVE MANUFACTURING: A TEACHING CASE STUDY OF INEX-ADAM

2020 ◽  
Vol 1 ◽  
pp. 245-254
Author(s):  
I. R. Kabir ◽  
G. H. Loh ◽  
E. Pei
Keyword(s):  
Additive Manufacturing ◽  
Industrial Applications ◽  
Functionally Graded ◽  
Multidisciplinary Nature ◽  
Product Manufacturing ◽  
Funded Project ◽  
Manufacturing Knowledge ◽  
The University ◽  
Industry Professionals

AbstractThe multidisciplinary nature and lack of comprehensive ‘materials-product-manufacturing’ knowledge of Functionally Graded Additive Manufacturing (FGAM) require training to support the future Additive Manufacturing experts. INEX-ADAM, an EU funded project is building a transnational platform to promote FGAM. Brunel University London conducted two-day workshop on FGAM at the University of Zagreb in Croatia with academics and industry professionals. The workshop will strengthen the research capabilities to harness the potential of the FGAM and mitigate the constraints to industrial applications.

Thermoelastic Crack Analysis in Functionally Graded Pipelines Conveying Natural Gas by an FEM

2018 ◽  
Vol 10 (04) ◽  
pp. 1850036 ◽  
Author(s):  
Mohamed A. Attia ◽  
Mohamed A. Eltaher ◽  
Ahmed Soliman ◽  
Alaa A. Abdelrahman ◽  
Amal E. Alshorbagy
Keyword(s):  
Natural Gas ◽  
Surface Hardness ◽  
Element Model ◽  
Functionally Graded ◽  
Coupled Analysis ◽  
Graded Materials ◽  
Steel Material ◽  
Pressurized Fluids ◽  
Present Case Study

Internal cracks are a serious problem in pipelines conveying unsteady pressurized fluids like natural gas. To investigate and overcome this problem, this paper is motivated to highlight and study the response of gas pipes made of functionally graded materials (FGM) instead of the traditional carbon steel material. FGM is proposed as a composite material because of its advantages of minimizing the stress variation in the pipe. Ceramic is applied because of its durability against corrosion and its surface hardness against erosion. FGM properties are radially graded and a finite element model is developed and implemented into ABAQUS package, including FORTRAN subroutines which are adapted for the present case study. Coupled plane strain thermoelastic analysis is used to investigate the stresses and the stress intensity factor (SIF) at various crack depths under the actual thermomechanical loads. Both coupled and uncoupled thermomechanical approaches are introduced and compared to reveal the necessity of the coupled analysis for accurate FGMs’ investigation. The different influences of unsteady thermal and mechanical loads on the crack propagation are discussed.

scholarly journals Junction Characterization in a Functionally Graded Aluminum Part

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3475 ◽  
Author(s):  
Elisa Fracchia ◽  
Federico Simone Gobber ◽  
Mario Rosso ◽  
Marco Actis Grande ◽  
Jana Bidulská ◽  
...  
Keyword(s):  
Density Ratio ◽  
Functionally Graded ◽  
Impact Testing ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Automotive Components ◽  
Metallurgical Bonding ◽  
Graded Material ◽  
Aluminum Part ◽  
Engine Components

Aluminum alloys are widely used to produce automotive components, thanks to their great mechanical properties–to–density ratio. Engine components such as pistons are conventionally produced by casting of Al–Si eutectic alloys (Silumin alloys) such as EN AC 48000. Due to the harsh working conditions and the lower ductility if compared to aluminum–silicon alloys with lower silicon content, pistons made of this alloy are prone to fatigue failures in the skirt region. In order to overcome such limits, the use of a Functionally Graded Material (FGM) in the production of a piston is proposed. The adoption of a functionally graded architecture can maximize the properties of the component in specific areas. A higher level of thermal resistance in the crown of the piston can be achieved with EN AC 48000 (AlSi12CuNiMg), while higher elongation at rupture in the skirt region would be conferred by an EN AC 42100 (AlSi9Mg0.3). The FGM properties are strictly related to the metallurgical bonding between the alloys as well as to the presence of intermetallic phases in the alloys junction. In the present article, the characterization of gravity casted FGM samples based on Al–Si alloys with respect to microstructure and mechanical testing is presented, with a specific focus on the characterization by impact testing of the joint between the two alloys.

Applying Path Planning to the Design of Additively Manufactured Functionally Graded Materials

2018 ◽  
Author(s):  
Tanner Kirk ◽  
Richard Malak ◽  
Raymundo Arroyave
Keyword(s):  
Functionally Graded ◽  
Future Research ◽  
Graded Materials ◽  
Functionally Gradient ◽  
Path Design ◽  
And Performance ◽  
Cr System ◽  
Parameter Dependency ◽  
Infinite Set

Additive manufacturing has enabled the creation of a near infinite set of functionally gradient materials. One limitation on the manufacturability and usefulness of these materials is the presence of undesirable phases along the gradient path. For example, such phases may increase brittleness, diminish corrosion resistance, or severely compromise the printability of the part altogether. In the current work, a design methodology is proposed to plan an FGM gradient path for any number of elements that avoids undesirable phases at a range of temperatures. Gradient paths can also be optimized for a cost function. A case study is shown to demonstrate the effectiveness of the methodology in the Fe-Ni-Cr system. Paths were successfully planned from 316L SS to pure Cr that either minimize path length or maximize separation from undesirable phases. Examinations on the stochastic variability, parameter dependency, and computational efficiency of the method are also presented. Several avenues of future research are proposed that could improve the manufacturability, utility, and performance of FGMs through gradient path design.

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