scholarly journals Monitoring damage accumulation in ceramic matrix composites using electrical resistivity

2008 ◽  
Vol 59 (4) ◽  
pp. 463-466 ◽  
Author(s):  
C SMITH ◽  
G MORSCHER ◽  
Z XIA
Keyword(s):  
Electrical Resistivity ◽  
Damage Accumulation ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites

scholarly journals Determination of out-of-plane electrical resistivity for nonoxide ceramic matrix composites

2018 ◽  
Vol 15 (4) ◽  
pp. 1040-1046
Author(s):  
Rabih Mansour ◽  
Yogesh Singh ◽  
Gregory Morscher ◽  
Fabian Breede ◽  
Dietmar Koch
Keyword(s):  
Electrical Resistivity ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Out Of Plane

Markov Chains for Damage Accumulation of Organic and Ceramic Matrix Composites

2001 ◽  
Vol 127 (9) ◽  
pp. 915-926 ◽  
Author(s):  
Y. Z. Pappas ◽  
P. D. Spanos ◽  
V. Kostopoulos
Keyword(s):  
Markov Chains ◽  
Damage Accumulation ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites

Quantification of Foreign Object Damage and Electrical Resistivity for Ceramic Matrix Composites and Tensile Residual Strength Prediction

2015 ◽  
Vol 137 (5) ◽  
Author(s):  
Frank Abdi ◽  
Gregory N. Morscher ◽  
Yibin Xue ◽  
Sung Choi
Keyword(s):  
Electrical Resistivity ◽  
Residual Strength ◽  
Fiber Strength ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Foreign Object ◽  
Foreign Object Damage ◽  
Transverse Tensile ◽  
Damage States

SiC-based ceramic matrix composites (CMC) in turbine engine applications must sustain certain foreign object impacts (FOIs) that might occur in services. Experiments and nondestructive evaluation (NDE) have illustrated good correlations between impact energy and foreign object damage (FOD) assessed using electrical resistivity (ER), acoustic emission (AE), and microscopy. A progressive failure dynamic analysis (PFDA) method is explored in understanding and predicting the damage states, ER, and residual strength after impact of CMCs. To accurately correlate the damage state with ER, the PFDA tool has been improved to incorporate the physical damage mechanisms in CMCs, which are matrix microcrack density due to both longitudinal and transverse tensile loads and the fiber breakage due to probabilistic fiber strength distribution. The predicted damage states and ER are correlated with the measurement of FOD and validated with tension after impact tests using high temperature ER. The PFDA tool has demonstrated a great potential for CMCs' FOD and residual strength predictions.

scholarly journals Damage accumulation and lifetime prediction of fiber-reinforced ceramic-matrix composites under thermomechanical fatigue loading

2020 ◽  
Vol 39 (1) ◽  
pp. 608-619
Author(s):  
Longbiao Li
Keyword(s):  
Fatigue Life ◽  
Damage Accumulation ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Thermomechanical Fatigue ◽  
Dissipated Energy ◽  
Peak Strain ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Fatigue Lifetime

AbstractIn this paper, the damage accumulation and life prediction in fiber-reinforced ceramic-matrix composites (CMCs) subjected to thermomechanical fatigue (TMF) loading are investigated. The relationships between TMF damage mechanisms, fatigue hysteresis-based damage parameters, fraction of broken fiber, and applied cycles are established. Evolution of fatigue hysteresis dissipated energy, fatigue hysteresis modulus, fatigue peak strain, fatigue broken fiber fraction versus applied cycle curves, and the fatigue life S–N curves is analyzed. Damage accumulation and fatigue life of cross-ply silicon carbide/magnesium aluminosilicate composite under in-phase (IP)- and out-of-phase (OP)-TMF and isothermal fatigue (IF) loading are predicted. Under the same fatigue peak stress, the fatigue lifetime decreases from IF loading at 566°C to IF loading at 1,093°C, IP-TMF and OP-TMF. The TMF loading significantly reduced the fatigue lifetime of CMCs.

Ceramic-matrix composites

2006 ◽  
Author(s):  
I. M. Low
Keyword(s):  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites

Elastic properties of braided ceramic matrix composites

2008 ◽  
Vol 99 (11) ◽  
pp. 1262-1267 ◽  
Author(s):  
Kamen Tushtev ◽  
Dietmar Koch ◽  
Georg Grathwohl
Keyword(s):  
Elastic Properties ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites
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