Rate-Sensitive Micromechanical Damage Model for Brittle Solid
Publication: Journal of Engineering Mechanics
Volume 122, Issue 5
Abstract
A micromechanical damage model for a brittle solid capable of taking into account the effect of high loading rate (in the form of stress-rate) is presented. Although, this model is applicable to any particulate brittle solid, concrete is given primary consideration. An existing self-consistent rate-insensitive model is modified and extended to induce rate dependency of concrete type material with preexisting damages (cracks). The variations of several fracture mechanics parameters of solid, viz., stress intensity factors, fracture toughnesses, etc., under the influence of high loading rates were given primary consideration. The process of crack evolution in a particulate cracked solid under tensile and compressive stress-field has been thoroughly considered along with all possible situations that may arise. Crack kinking and nucleation are considered for both tensile and compressive stress-field. The resulting rate-sensitive micromechanical damage model has been codified and several experiments have been replicated to validate it.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 122 • Issue 5 • May 1996
Pages: 412 - 422
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: Jan 19, 1996
Published in print: May 1, 1996
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