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1 1999

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Acoustic Emission Data on Mechanism Fracture of Unidirectional Fiber Reinforced Composites

Leksowskij A., Abdumanonov A., Pilecki S., Ranachowski P.

Molecular and Quantum Acoustics

1999

Vol. 20

135-141

The investigation of fiber's break process was carried out by acoustic emission method under tensile loading of AL-B and carbon fibers reinforced composites. The experiment has shown that final act of macrofacture is preceding by sequence of single breaks, which time interval are shortened impetuously. The analysis interval of time sequence point out that the fiber breaks are correlated and the distribution of local stress by relaxation process. It is established that Weibull's distribution of B-fibers strength is not homogeneous and has characteristic modes. lt is shown that Zweben's model on determination of strength of unidirectional fibers reinforced composites gives satisfactory agreement with an experiment under taking into account lowering of coefficient stress concentration on fiber, neighboring to broken (at the expense of relaxation effect) and using the parameter of width distribution not on the whole, but without weak one.