Data processing: structural design – modeling – simulation – and em – Structural design
Reexamination Certificate
2006-01-03
2006-01-03
Jones, Hugh (Department: 2128)
Data processing: structural design, modeling, simulation, and em
Structural design
C703S006000
Reexamination Certificate
active
06983226
ABSTRACT:
A composite material having a microstructure model is provided with a continuous matrix of microstructure entities such as particles and grains that rotate under both remotely applied stresses and induced concentrated stresses from nearby cracks, pores and smaller particles, all networked within the matrix. The rotation microstructure entities are smooth closed contours that are elliptically-shaped. A net moment results on the boundaries of the microstructure entities effecting fracture toughening of the material. Small particles and other microstructural entities may reduce the attenuation of, transmit, and counteract the stresses induced by the rotating microstructure entities. The induced stresses counteract those stresses and strain energy densities that promote crack propagation. The result is a microstructure free of laminates, coatings, fibers and fiber architectures that effect toughening of the material against fracture.
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Koichi Niihara,New Design Concept of Structural Ceramics-Ceramics Nanocomposites, The Centennial Memorial Issue of The Ceramic Society of Japan, vol. 99, No. 10, pp. 974-982 (1991).
Dykema Gossett PLLC
Jones Hugh
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