open access

https://hdl.handle.net/2115/45600

Buckling of Bridging Fibres in Composites

英語

1994-12-01

Springer

Journal of Materials Science Letters

13(24)

1800-1803

In brittle materials such as concrete and ceramics, fiber reinforcement has beenwidely accepted as an effective way of improving their strength and toughness. In addition, a notable pseudo strain-hardening phenomenon can contribute to a significantly enhanced ductility of the composite when adequately designed fiber system is used. This condition was first proposed by Aveston et al. [1], and later extended by Marshall et al. [2] for continuous aligned fiber reinforced brittle matrix composites. More recently, further extension to randomly oriented discontinuous fiber reinforced composites have been presented [3,4]. Upon satisfying these conditions described in the above mentioned micromechanical models, the ultimate tensile strains of the composites are usually improved by two order of magnitude ( e.g. see [5], [6], [7]). The total fracture energy reaching 35 kJ/m2 was also reported for a 2% polyethylene fiber reinforced cement paste [8]. This kind of ductile fracture resembles metal instead of brittle materials.

学術雑誌論文

Accepted Manuscript

0261-8028

0261-8028

AA10635671