Effects of Platelet Size and Mean Volume Fraction on Platelet Orientation and Volume Fraction Distributions in Functionally Graded Material Fabricated by a Centrifugal Solid-Particle Method

2007 ◽  
Vol 129 (2) ◽  
pp. 304-312 ◽  
Author(s):  
P. D. Sequeira ◽  
Yoshimi Watanabe ◽  
Hiroyuki Eryu ◽  
Tetsuya Yamamoto ◽  
Kiyotaka Matsuura
Keyword(s):  
Solid Particle ◽  
Volume Fraction ◽  
Experimental Studies ◽  
Particle Method ◽  
Processing Parameters ◽  
Model System ◽  
Model Material ◽  
Functionally Graded ◽  
Formation Mechanisms ◽  
Graded Material

Background. A centrifugal solid-particle method has been successfully used as a means to fabricate functionally graded materials (FGMs). Various processing parameters significantly influence the formation of the graded microstructural and properties distribution in these FGMs. Method of Approach. Alloys with different Al3Ti platelet volume fractions and platelet sizes are used to study the effects of those parameters on graded distributions of the volume fraction and orientation of platelets. Al-platelet/plaster FGMs are used as a model system, and the effects of the same parameters are investigated. Results. It was found that an increase in initial volume fraction and particle size leads to steeper gradients of volume fraction and orientation distributions within the Al-Al3Ti FGMs. The results of the experimental studies are compared to those of the model material. Conclusions. It was verified that, although with some limitations, the proposed model system will be useful in the study of the formation mechanisms of the graded distributions in the FGMs.

Evaluation of Casting Textures in Al/Al3Ti Platelet Functionally Graded Material Fabricated by a Centrifugal Solid-Particle Method

2002 ◽  
Vol 408-412 ◽  
pp. 1771-1776
Author(s):  
Yoshimi Watanabe ◽  
Hiroyuki Eryu ◽  
Tetsuya Yamamoto ◽  
Sutandyo Andiarwanto ◽  
Hiromi Miura
Keyword(s):  
Solid Particle ◽  
Functionally Graded Material ◽  
Particle Method ◽  
Functionally Graded ◽  
Graded Material

Fabrication of Cu-Based Functionally Graded Materials Dispersing Fine Sic Particles by a Centrifugal Mixed-Powder Method

2010 ◽  
Vol 638-642 ◽  
pp. 2160-2165 ◽  
Author(s):  
Hisashi Sato ◽  
Yoshifumi Inaguma ◽  
Yoshimi Watanabe
Keyword(s):  
Solid Particle ◽  
Powder Mixture ◽  
Volume Fraction ◽  
Processing Technique ◽  
Functionally Graded ◽  
Solid Particles ◽  
Mixed Powder ◽  
Powder Method ◽  
Sic Particles ◽  
Graded Material

Recently, a centrifugal mixed-powder method has been proposed as the processing technique of functionally graded material (FGM) containing fine solid-particles. In this study, Cu-based FGM containing SiC particles was fabricated using this technique. Although the density of SiC is smaller than that of Cu, these SiC particles are successfully distributed on surface of the cylindrical FGM. From this result, it is clear the movement of solid particle in powder mixture during casting is small. Therefore, the gradual distribution of the solid particle can be formed by the control of the volume fraction of solid-particles in powder mixture. Also, it is found that smaller SiC particle can improve the hardness on the surface of the FGMs effectively rather than larger one. In this study, the assignment of the centrifugal mixed-powder method was suggested from the obtained results.

TSDT theory for free vibration of functionally graded plates with various material properties

2021 ◽  
Vol 8 (4) ◽  
pp. 691-704
Author(s):  
M. Janane Allah ◽  
◽  
Y. Belaasilia ◽  
A. Timesli ◽  
A. El Haouzi ◽  
...  
Keyword(s):  
Degrees Of Freedom ◽  
Volume Fraction ◽  
Equations Of Motion ◽  
Shear Deformation Theory ◽  
Functionally Graded ◽  
Third Order ◽  
Implicit Algorithm ◽  
Proposed Model ◽  
Graded Material ◽  
Composite Modeling

In this work, an implicit algorithm is used for analyzing the free dynamic behavior of Functionally Graded Material (FGM) plates. The Third order Shear Deformation Theory (TSDT) is used to develop the proposed model. In this contribution, the formulation is written without any homogenization technique as the rule of mixture. The Hamilton principle is used to establish the resulting equations of motion. For spatial discretization based on Finite Element Method (FEM), a quadratic element with four and eight nodes is adopted using seven degrees of freedom per node. An implicit algorithm is used for solving the obtained problem. To study the accuracy and the performance of the proposed approach, we present comparisons with literature and laminate composite modeling results for vibration natural frequencies. Otherwise, we examine the influence of the exponent of the volume fraction which reacts the plates "P-FGM" and "S-FGM". In addition, we study the influence of the thickness on "E-FGM" plates.

Manufacturing and Measuring Mechanical Properties of Continuous Functionally Graded Beam

2021 ◽  
Vol 21 (2) ◽  
pp. 7-11
Author(s):  
Ahmed Mansoor Abbood ◽  
Haider K. Mehbes ◽  
Abdulkareem. F. Hasan
Keyword(s):  
Mechanical Properties ◽  
Young’S Modulus ◽  
Volume Fraction ◽  
Young's Modulus ◽  
Functionally Graded ◽  
High Concentration ◽  
Functionally Graded Beam ◽  
Low Concentration ◽  
Graded Material ◽  
Vertical Gravity

In this study, glass-filled epoxy functionally graded material (FGM) was prepared by adopting the hand lay-up method. The vertical gravity casting was used to produce a continuous variation in elastic properties. A 30 % volume fraction of glass ingredients that have mean diameter 90 μm was spread in epoxy resin (ρ = 1050 kg/m3). The mechanical properties of FGM were evaluated according to ASTM D638. Experimental results showed that a gradually relationship between Young’s modulus and volume fraction of glass particles, where the value of Young’s modulus at high concentration of glass particles was greater than that at low concentration, while the value of Poisson’s ratio at high concentration of glass particles was lower than that at low concentration. The manufacture of this FG beam is particularly important and useful in order to benefit from it in the field of various fracture tests under dynamic or cyclic loads.

Design Model and Prediction Model on Preparation of Functionally Graded Material by Co-Sedimentation

2005 ◽  
Vol 492-493 ◽  
pp. 471-476 ◽  
Author(s):  
Zhi Guang Zhou ◽  
Lian Meng Zhang ◽  
Qiang Shen ◽  
Dao Ren Gong
Keyword(s):  
Prediction Model ◽  
Volume Fraction ◽  
Functionally Graded ◽  
Design Model ◽  
Design Experiment ◽  
Mathematical Relationship ◽  
Graded Material ◽  
Powder Properties ◽  
Set Up ◽  
The Relationship

From the process of sedimentation the mathematical relationship between deposition volume and powder properties as well as sedimentation parameters was deduced in this paper. The relationship was expressed by using indirect method. Based on the formula, design model and prediction model were set up. The models can be used to design powder properties and predict the volume fraction of FGM. Programs to solve the models were developed in numerical methods. As examples, TiC-Ni system FGM were designed and predicted. The prediction results fit well with the design. Experiment of Mo-Ti system FGM was used to validate the prediction model.

Wave propagation analysis of thermoelastic functionally graded nanotube conveying nanoflow

2020 ◽  
pp. 107754632097704
Author(s):  
Jiayin Dai ◽  
Yongshou Liu ◽  
Guojun Tong
Keyword(s):  
Wave Propagation ◽  
Temperature Variation ◽  
Volume Fraction ◽  
Functionally Graded ◽  
Nonuniform Temperature ◽  
Propagation Analysis ◽  
Graded Material ◽  
The Stability ◽  
Volume Fraction Function ◽  
Better Than

As a hollow cylindrical structure, a nanotube has potential to convey nanoflow, which has opened up a field of research. Functionally graded nanotube as a designable structure with continuous variation of material properties can perform better than uniform nanotube, especially in physical field without introducing large stress concentration. In this article, we take the thermal effect into account and investigated the wave propagation characteristics of functionally graded material nanotube conveying nanoflow. In particular, we compared the effects of different kinds of volume fraction function and also the cases of uniform and nonuniform temperature variation. According to the numerical results, we can conclude that as we decrease the exponent n of the volume fraction function, the system is enhanced and larger enhancement can be observed in the case of the power volume fraction function. In addition, there is a positive correlation between the stability and both the temperature variation and the nonuniformity of temperature variation.

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