Mechanical Properties of C/C Composites

Tensile strength and fiber/matrix interfacial properties of 2D- and 3D-carbon/carbon composites

“…[6][7][8][9][10][11][12][13][14] The common results obtained by these studies are; the tensile modulus increases and fracture strain decreases with increasing the final heat treatment temperature (HTT) up to 2500 • C, and the tensile strength and modulus increases with increasing the bulk density. These conclusions were seemed to be drawn only from experimental evidences without any clear understanding of fracture mechanics.…”

“…The present study about threedimensionally fiber-reinforced C/Cs (3D-C/Cs) has done within this framework study. One of the characteristics of laminate (2D-) C/Cs is poor interlaminar shear strength (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) MPa) that comes from lack of reinforcement in the thickness direction. Thus, 2D-C/Cs can be applied to the structures that sustain only in-plane stress field.…”

Dynamic Stress Intensity Factor of Fixed Beam with Several Notches by Infinitely Similar Element Method

“…The use of fractal geometry to generate infinite number of finite elements around the crack tips has been adopted widely [5][6]. The transition methods of geometrically similar element to calculate the dynamic stress intensity factor (DSIF) of crack [7] and notch [8] have been put forward, respectively. The DSIF for fixed specimen with two notches or cracks under centralized load and well-proportioned loading was calculated by the transition method of geometrically similar element in this paper.…”