TY - GEN
T1 - Impact of material and architecture model parameters on the failure of woven cmcs via the multiscale generalized method of cells
AU - Liu, Kuang
AU - Chattopadhyay, Aditi
AU - Arnold, Steven M.
PY - 2011
Y1 - 2011
N2 - It is well known that failure of a material is a locally driven event. In the case of ceramic matrix composites (CMCs), significant variations in the microstructure of the composite exist and their significance on both deformation and life response need to be assessed. Examples of these variations include changes in the fiber tow shape, void content within tows, tow shifting/nesting and voids within and between tows. In the present work, the effects of many of these architectural parameters and material scatter of woven ceramic composite properties at the macroscale (woven RUC) will be studied to assess their sensitivity. The recently developed Multiscale Generalized Method of Cells methodology is used to determine the overall deformation response, proportional elastic limit (first matrix cracking), and failure under tensile loading conditions. The macroscale responses investigated illustrate the effect of architectural and material parameters on a single RUC representing a five harness satin weave fabric. Results shows that the most critical architectural parameter is the weave void content with other parameters being less in severity. Variation of the matrix material properties was also studied to illustrate the influence of the material variability on the overall features of the composite stress-strain response.
AB - It is well known that failure of a material is a locally driven event. In the case of ceramic matrix composites (CMCs), significant variations in the microstructure of the composite exist and their significance on both deformation and life response need to be assessed. Examples of these variations include changes in the fiber tow shape, void content within tows, tow shifting/nesting and voids within and between tows. In the present work, the effects of many of these architectural parameters and material scatter of woven ceramic composite properties at the macroscale (woven RUC) will be studied to assess their sensitivity. The recently developed Multiscale Generalized Method of Cells methodology is used to determine the overall deformation response, proportional elastic limit (first matrix cracking), and failure under tensile loading conditions. The macroscale responses investigated illustrate the effect of architectural and material parameters on a single RUC representing a five harness satin weave fabric. Results shows that the most critical architectural parameter is the weave void content with other parameters being less in severity. Variation of the matrix material properties was also studied to illustrate the influence of the material variability on the overall features of the composite stress-strain response.
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U2 - 10.1002/9781118095393.ch17
DO - 10.1002/9781118095393.ch17
M3 - Conference contribution
AN - SCOPUS:80155161442
SN - 9781118059951
T3 - Ceramic Engineering and Science Proceedings
SP - 175
EP - 192
BT - Developments in Strategic Materials and Computational Design II - A Collection of Papers Presented at the 35th International Conference on Advanced Ceramics and Composites, ICACC
PB - American Ceramic Society
T2 - Developments in Strategic Materials and Computational Design II - 35th International Conference on Advanced Ceramics and Composites, ICACC
Y2 - 23 January 2011 through 28 January 2011
ER -