LALIT JAIN - Academia.edu (original) (raw)
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Université Sorbonne Paris Nord / Sorbonne Paris Nord University
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Papers by LALIT JAIN
Acta Metallurgica Et Materialia, 1992
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 1992
The effective fracture toughness of brittle matrix materials can be increased through the additio... more The effective fracture toughness of brittle matrix materials can be increased through the addition of short, poorly bonded fibers which bridge the growing crack. Using a fundamental crack opening-restraining traction law for the resistance to crack propagation provided by an arbitrarily oriented fiber which bridges a crack, together with the fiber orientation and location density functions, a micromechanical model is developed. This model determines the effective crack openingtraction law of the bridging fibers. The steady-state toughness increment is obtained by integrating the contributions of the individual fiber pull out energies. This model includes the observed effect that fibers at large angles to the crack face normal may break rather than pull out. The shear stress at the fiber-matrix interface is allowed to vary during pull out, simulating fiber or matrix damage. Results are presented for a variety of representative fiber orientation states and interfacial shear cases.
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 1993
The fracture properties of a composite material reinforced with discontinuous fibers depend on ho... more The fracture properties of a composite material reinforced with discontinuous fibers depend on how the fibers are oriented with respect to the crack plane. If the fibers are randomly oriented, their fracture contribution is independent of the crack orientation. In the more usual case, fibers possess a biased-orientation distribution, and fracture properties such as fiber pull-out energy or fiber crack bridging do depend on the crack orientation. Simple methods are given for finding the distribution of fiber orientation angles relative to the crack face for any crack orientation and fiber orientation distribution. These methods are demonstrated for the pull-out energy of poorly bonded fibers. The results clearly show the variation of pull-out energy with crack orientation. The proposed methods are presented as an "enabling technology", and are sufficiently general to permit application to other fracture properties.
Journal of The American Ceramic Society, 1989
Acta Metallurgica Et Materialia, 1992
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 1992
The effective fracture toughness of brittle matrix materials can be increased through the additio... more The effective fracture toughness of brittle matrix materials can be increased through the addition of short, poorly bonded fibers which bridge the growing crack. Using a fundamental crack opening-restraining traction law for the resistance to crack propagation provided by an arbitrarily oriented fiber which bridges a crack, together with the fiber orientation and location density functions, a micromechanical model is developed. This model determines the effective crack openingtraction law of the bridging fibers. The steady-state toughness increment is obtained by integrating the contributions of the individual fiber pull out energies. This model includes the observed effect that fibers at large angles to the crack face normal may break rather than pull out. The shear stress at the fiber-matrix interface is allowed to vary during pull out, simulating fiber or matrix damage. Results are presented for a variety of representative fiber orientation states and interfacial shear cases.
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 1993
The fracture properties of a composite material reinforced with discontinuous fibers depend on ho... more The fracture properties of a composite material reinforced with discontinuous fibers depend on how the fibers are oriented with respect to the crack plane. If the fibers are randomly oriented, their fracture contribution is independent of the crack orientation. In the more usual case, fibers possess a biased-orientation distribution, and fracture properties such as fiber pull-out energy or fiber crack bridging do depend on the crack orientation. Simple methods are given for finding the distribution of fiber orientation angles relative to the crack face for any crack orientation and fiber orientation distribution. These methods are demonstrated for the pull-out energy of poorly bonded fibers. The results clearly show the variation of pull-out energy with crack orientation. The proposed methods are presented as an "enabling technology", and are sufficiently general to permit application to other fracture properties.
Journal of The American Ceramic Society, 1989