Frictional heating in a unidirectional fibre-reinforced ceramic composite

Micro-frictional dissipation in fiber-reinforced ceramic matrix composites and interfacial shear estimation with a consideration of uneven fiber packing

“…Micro-frictional heating phenomenon of FRCMCs under cyclic loading condition was reported [1] and well known. The frictional heat of this phenomenon depends on the range, magnitude, and direction of fatigue stress [2], the loading frequency, the matrix crack spacing [2,6], the broken fibers [4], and the material properties of the composite system.…”

“…(1) or (3) is dissipated into the surrounding medium in the form of heat. As the saturation of matrix cracking is achieved under a constant fatigue load, the frictional work rate and/or the temperature distribution of the composite remain constant to be a steady state condition.…”

“…Cho and coauthors [1][2][3][4][5] proposed an interfacial shear measurement which utilizes the frictional heating phenomenon of FRCMC during cyclic loading. In unidirectionally fiber-reinforced CMCs, a major cause of frictional heating is dissipation energy due to micro-frictional sliding between reinforcing fibers and matrix along the debonded interface.…”

“…Besides, a frictional heating measurement [1][2][3][4][5] has been proposed as a simpler complementary one. Exceptionally the frictional heating method can trace the change of the in situ interfacial shear without interrupting a working condition and results in an average interfacial shear directly on application.…”

Mechanical hysteresis and damage evolution in C/SiC composites under fatigue loading at room and elevated temperatures

“…During the cyclic loading, the composite modulus decreases, and the width of stress‐strain hysteresis loop and the residual strain increase. The experimental observation and measurement provide a basis for the investigation of fatigue damage mechanism of fiber‐reinforced CMCs, including, ultrasonic, acoustic emission, scanning electron microscope, surface temperature, electrical resistivity, and the hysteresis measurements . The fatigue hysteresis loops area, that is, the hysteresis dissipated energy, can be used to analyze the internal damage evolution in fiber‐reinforced CMCs under cyclic fatigue loading .…”