Matrix cracking with frictional bridging fibres in continuous fibre ceramic composites

Bridging mechanisms in a Tiβ21s/SCS-6 composite: In-Situ scanning electron microscopy study

“…[11] The problem of large-scale sliding has been analyzed by Xia et al [22] Recently, the effects of Poisson's ratio on the interfacial shear stress have been analyzed by Hsueh. [25] Strictly speaking, all these approaches apply to elastic-elastic systems only.…”

“…[1] Many studies [1][2][3][4][5][6][7][8][9][10] have been carried out to characterize the fatigue crack growth behavior of the composites at ambient and elevated temperatures and have concluded that the improved fatigue crack growth resistance benefits from the bridging effects caused by intact fibers across the crack path. Many attempts [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] have also been made to analyze the bridging effects and to predict the effective fatigue driving forces at the crack tip. The method employed by most researchers to model fiber bridging is the stressintensity-factor range approach, which is based on fracture mechanics.…”

“…Generally, two different methods have been used: one is based on a shear-lag strategy, [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] and the other is based on a stress-balance strategy. [27,28] In the models based on the shear-lag strategy, it is assumed that the stress sustained by bridging fibers can be transferred to the matrix by interfacial sliding and, therefore, can act as a "pressure" to retard the opening of the crack.…”