open access

https://hdl.handle.net/2115/47460

短繊維補強複合材料の単調及び繰返し載荷下ひび割れ架橋則における繊維疲労破断の影響

英語

Cyclic loading fatigue rupture

2008-08

Japan Sosiety of Civil Engineers

Journal of Applied Mechanics

Vol. 11

891-902

This paper presents the micromechanical modeling of fiber bridging constitutive laws of a discontinuous fiber reinforced composite (DFRC) under monotonic and cyclic loading with the effects of fiber fatigue rupture. Based on the considerations of fatigue damage on randomly distributed fibers under the fatigue loading of constant crack opening amplitude, the monotonic and cyclic fiber bridging constitutive laws are derived. It is shown that, as fiber fatigue rupture proceeds, maximum bridging stress as well as crack opening displacement at which bridging stress vanishes are decreased. Also, the critical normalized number of cycles, n*crit, at which crack bridging degradation takes place, is analytically derived, and its role is explained for the design of a DFRC against fatigue.

学術雑誌論文

Version of Record

1345-9139

1884-832X

AA11311063