TY - GEN

T1 - Prediction of creep rupture in unidirectional composites

AU - Koyanagi, Jun

AU - Ogawa, Fumio

AU - Kawada, Hiroyuki

PY - 2005/12/1

Y1 - 2005/12/1

N2 - This paper describes a creep rupture model that takes into account the interfacial debonding and its propagation around broken fibers in unidirectional fiber-reinforced polymers. The interfacial debonding is accompanied by fiber breaks under a longitudinal tensile load, and it causes the material property to decrease with increase of the interfacial debonding length. Also, there is a interaction between probability of fiber break and the growth of the interfacial debonding, eventually, the rate of the decrease of material properties is exponentially. In this study, the probability of the fiber break is formulated as a function of stress recovery length that has a time-dependency and the creep rupture strain is predicted as a function of the increase rate of the stress recovery length. Moreover, the creep behavior is predicted by using compliance component of the matrix as a function of time. It is assumed that when the composite strain reaches the time-dependent material rupture strain, the composite fails in creep rupture.

AB - This paper describes a creep rupture model that takes into account the interfacial debonding and its propagation around broken fibers in unidirectional fiber-reinforced polymers. The interfacial debonding is accompanied by fiber breaks under a longitudinal tensile load, and it causes the material property to decrease with increase of the interfacial debonding length. Also, there is a interaction between probability of fiber break and the growth of the interfacial debonding, eventually, the rate of the decrease of material properties is exponentially. In this study, the probability of the fiber break is formulated as a function of stress recovery length that has a time-dependency and the creep rupture strain is predicted as a function of the increase rate of the stress recovery length. Moreover, the creep behavior is predicted by using compliance component of the matrix as a function of time. It is assumed that when the composite strain reaches the time-dependent material rupture strain, the composite fails in creep rupture.

UR - http://www.scopus.com/inward/record.url?scp=32044435131&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:32044435131

SN - 0912053909

T3 - Proceedings of the 2005 SEM Annual Conference and Exposition on Experimental and Applied Mechanics

SP - 1857

EP - 1863

BT - Proceedings of the 2005 SEM Annual Conference and Exposition on Experimental and Applied Mechanics

T2 - 2005 SEM Annual Conference and Exposition on Experimental and Applied Mechanics

Y2 - 7 June 2005 through 9 June 2005

ER -