Effects of whisker content and dimensions on the R-curve behavior of an alumina matrix composite reinforced with silicon carbide whiskers

2001 ◽  
Vol 16 (7) ◽  
pp. 1919-1927 ◽  
Author(s):  
Takashi Akatsu ◽  
Minoru Suzuki ◽  
Yasuhiro Tanabe ◽  
Eiichi Yasuda
Keyword(s):  
Silicon Carbide ◽  
Matrix Composite ◽  
Volume Fraction ◽  
Alumina Matrix ◽  
Crack Face ◽  
Silicon Carbide Whiskers ◽  
Simulation Based ◽  
Alumina Matrix Composite ◽  
Crack Tip Opening ◽  
Good Agreement

A study was made of the effects of whisker content and dimensions on the R-curve behavior of an alumina matrix composite reinforced with silicon carbide whiskers. Experiments showed that the rising R-curve behavior is strongly enhanced by the increase in the volume fraction and the size of whiskers. Simulation based on a model of crack face whisker bridgings was made to elucidate the effects on the R-curve of the composite. The validity of the simulation was confirmed by good agreement between the experimental and the calculated R-curves. In addition to the R-curve, the distribution of crack closure stresses as well as crack tip opening displacements was also calculated, which directly reflects crack face whisker bridging processes in the composite. Then the dependence of whisker content and dimensions on the R-curve was analytically discussed taking the bridging processes into account.

Numerical Simulation on Thixo-Forging of Magnesium Matrix Composite

2011 ◽  
Vol 189-193 ◽  
pp. 2535-2538 ◽  
Author(s):  
Hong Yan ◽  
Wen Xian Huang
Keyword(s):  
Numerical Simulation ◽  
Matrix Composite ◽  
Metal Flow ◽  
Magnesium Matrix Composite ◽  
Magnesium Matrix ◽  
Simulation Based ◽  
Prior Literature ◽  
Simulation Results ◽  
Computer Numerical Simulation ◽  
Good Agreement

The thixo-forging of magnesium matrix composite was analyzed with computer numerical simulation based on rigid viscoplastic finite element method. The constitutive model of SiCp/AZ61 composite was established in our prior literature. Behavior of metal flow and temperature field were obtained. The differences between traditional forging and thixo-forging processes were analyzed. Results indicated that thixo-forging was better in filling cavity than forging. Simulation results were good agreement with experimental ones.

Simulation-based verification of homogenization approach in predicting effective thermal conductivities of wavy orthotropic fiber composite

2019 ◽  
Vol 08 (04) ◽  
pp. 1950015
Author(s):  
C. Mahesh ◽  
K. Govindarajulu ◽  
V. Balakrishna Murthy
Keyword(s):  
Volume Fraction ◽  
Fiber Composite ◽  
Micromechanical Model ◽  
Two Stage ◽  
Micromechanics Models ◽  
Simulation Based ◽  
Homogenization Approach ◽  
Homogenized Model ◽  
Good Agreement ◽  
Thermal Conductivities

In this work, applicability of homogenization approach is verified with the micromechanics approach by considering wavy orthotropic fiber composite. Thermal conductivities of [Formula: see text]-300 orthotropic wavy fiber composite are determined for micromechanical model and compared with the results obtained by two stage homogenized model over volume fraction ranging from 0.1 to 0.6. Also, a methodology is suggested for reducing percentage deviation between homogenization and micromechanical approaches. Effect of debond on the thermal conductivities of wavy orthotrophic fiber composite is studied and compared with perfectly aligned fiber composite for different volume fraction. It is observed that results obtained by the homogenization approach are in good agreement with the results obtained through micromechanics approach. Maximum percentage deviation between homogenized and micromechanics models is 2.13%.

Hip-simulator wear studies of an alumina-matrix composite (AMC) ceramic compared to retrieval studies of AMC balls with 1–7 years follow-up

Wear ◽  
2009 ◽  
Vol 267 (5-8) ◽  
pp. 702-709 ◽  
Author(s):  
I.C. Clarke ◽  
D.D. Green ◽  
P.A. Williams ◽  
K. Kubo ◽  
G. Pezzotti ◽  
...  
Keyword(s):  
Matrix Composite ◽  
Alumina Matrix ◽  
Hip Simulator ◽  
Alumina Matrix Composite

The aging micromechanisms of alumina matrix composite (AMC) used in total hip arthroplasty

2017 ◽  
Vol 22 (3) ◽  
pp. 524-530 ◽  
Author(s):  
Shinji Horie ◽  
Yasuhito Takahashi ◽  
Takaaki Shishido ◽  
Toshinori Masaoka ◽  
Toshiyuki Tateiwa ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Matrix Composite ◽  
Hip Arthroplasty ◽  
Alumina Matrix ◽  
Total Hip ◽  
Alumina Matrix Composite
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