Modeling of Hysteresis Loops and Life Prediction in Cross-ply Ceramic Matrix Composites
|School||Nanjing University of Aeronautics and Astronautics|
|Course||Power Machinery and Engineering|
|Keywords||Ceramic Laminated Composites Shear-lag theory Mechanism of injury Hysteresis loop Life Prediction|
Ceramic Laminated composite materials with high temperature , resistance to wear , high specific strength and advantages to overcome the shortcomings of unidirectional ceramic matrix composite low intensity of the off-axis direction . Ceramic grassroots co hysteresis loop , the SN curve is to be applied to the structural components on the premise of important significance . Developed ceramic Laminated composite under quasi - static loading stress - strain curve simulation method . Under uniaxial loading ceramic Laminated composite damage mechanisms 900 layer transverse cracks , the 00 - layer matrix cracking 00 layer interface debonding and 00 - layer fiber failure . The theoretical analysis using laminated shear lag ceramic Laminated stress distribution in the composite material injury , to discuss the impact of various factors on the stress distribution . Laminated shear-lag theory and micromechanical damage model combined to determine the parameters of the various stages of injury and stress - strain curve simulation , discussion of various factors on the composite damage , and thus the impact of the stress - strain curve . The theoretical prediction of the uniaxial tensile stress - strain curve foreign and C / SiC test results show that : predictive value is consistent with the experimental results . The the laminate shear lag theory and hysteresis theory combining together the hysteresis loop of the composite ceramic grassroots analog , analysis of the impact of various factors on the hysteresis loop , the failure of the fiber the statistical model Evans interface wear model combination of ceramic matrix SN curve of the composite forecast. The theoretical prediction of the hysteresis loop , SN curve with foreign and C / SiC tension - tension fatigue tests were compared : predictive value is consistent with the experimental results .