국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Impact of Material and Architecture Model Parameters on the Failure of Woven Ceramic Matrix Composites (CMCs) Via the Multiscale Generalized Method of Cells
저자	Liu, Kuang C.;; Arnold, Steven M.
Keyword	CERAMIC MATRIX COMPOSITES;; DEFORMATION;; MATRIX MATERIALS;; MICROSTRUCTURE;; PROPORTIONAL LIMIT;; STRESS-STRAIN RELATIONSHIPS;; VOIDS
URL	http://hdl.handle.net/2060/20110023427
보고서번호	NASA/TM-2011-217011
발행년도	2011
출처	NTRS (NASA Technical Report Server)
ABSTRACT	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, 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 weave void shape and 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.