Modeling Creep Effects in Advanced SiC/SiC Composites

DiCarlo, James ; Lang, Jerry

PID  :  NTRS Document ID: 20110001435
RP-ID  :  E-15734

学科分类：复合材料

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Because advanced SiC/SiC composites are projected to be used for aerospace components with large thermal gradients at high temperatures, efforts are on-going at NASA Glenn to develop approaches for modeling the anticipated creep behavior of these materials and its subsequent effects on such key composite properties as internal residual stress, proportional limit stress, ultimate tensile strength, and rupture life. Based primarily on in-plane creep data for 2D panels, this presentation describes initial modeling progress at applied composite stresses below matrix cracking for some high performance SiC/SiC composite systems recently developed at NASA. Studies are described to develop creep and rupture models using empirical, mechanical analog, and mechanistic approaches, and to implement them into finite element codes for improved component design and life modeling