Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7212361 | Composites Part B: Engineering | 2018 | 31 Pages |
Abstract
C/SiC composites have wide applications in thermal protective structures of spacecraft, whose impact resistance is essential for safe service. As a continuation of the previous experimental work, two failure modes of C/SiC composites under the impact loads of different shapes of projectiles are investigated through numerical simulations. First, based on the analysis of the damage mechanism, a two-part brittle orthotropic constitutive model is proposed by coupling the orthotropic elastic relationship and the equation of state to describe the dynamic impact response of C/SiC to the spherical projectile. Second, owing to a distinctive equivalent hardening failure mode of C/SiC when impacted by the flat flyer, a modified three-part orthotropic constitutive model is proposed, which introduces an additional pseudoplastic sub-model to describe the yield and post-yield responses. Finally, compared with the experimental results, the rationality and accuracy of these two models and their corresponding parameters are illustrated with respect to damage characteristics, stress-strain curves, the shape of the debris cloud, and free surface velocity, using the commercial software Autodyn.
Related Topics
Physical Sciences and Engineering
Engineering
Engineering (General)
Authors
Yang Yang, Fei Xu, Xiangyang Gao, Gangwei Liu, Meng Zhang,