Paper number 786
|DAMAGE IN PARTICULATE COMPOSITES WITH HARD PARTCILES EMBEDDED IN A SOFT MATRIX|
Young W. Kwon1 and C. T. Liu2
1Department of Mechanical Engineering, Naval Postgraduate School
700 Dyer Road, Monterey, California, 93943, USA
2OL/AC, Air Force Research Laboratory
10 East Saturn Blouvard, Edwards AFB, California, 93524, USA
|Summary||Damage evolution in a particulate composite around a notch tip was studied. The composite had hard and stiff particles embedded in a soft and weak matrix like a rubber material. The major damage modes were the interface debonding called dewetting and the resulting matrix cracking because the particles were much stronger than the matrix. A numerical modeling and simulation of such damage was conducted using the micro/macro-approach. This technique combined micro-level analysis and macro-level analysis. Damage was described at the micro-level using a damage theory. Damage initiation and growth at a circular notch tip were predicted from the numerical study, and their results were compared to experimental data. Both results compared very well.
||Keywords|| damage, particulate composite, micromechanics, finite element analysis, micro/macro-approach.
Theme : Mechanical and Physical Properties ; Damage Mechanics
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