1730 脆性マトリックス繊維複合材料の強度信頼性モデル

概要

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The strength and reliability analysis model for brittle matrix composites with continuous fibers is proposed, in order to investigate theoretically if this material can be applied for practical use from the viewpoint of materials reliability engineering. The model is based on the Markov process, in which it is assumed that a state of damage in the composite is developed with each fiber breakage. When the weibull distribution is used as a strength distribution of the fiber, each state probability is analytically obtained as a function of stress. The expected value and variance in the stress-strain relation of the composite are estimated from the state probabilities. In addition the maximum stress of the expected value, i.e. the strength, is predicted together with the coefficient of variation. It is proved that, if broken fibers are recovered in stress along the fiber-axis away from the breakage points due to sliding force, the composite exhibits a higher strength and reliability than that of a bundle structure.
一般社団法人日本機械学会の論文
2000-07-31