A multi-scale damage model and mechanical behavior for novel light-weight C/C honeycomb sandwich structure

• DOI: 10.1016/j.jmrt.2023.06.101
• Publication Date: 2023-06-16T02:31:13Z
• Authors: Lijia Guo; Hongcui Wang; Yuping Yang; Weijie Li; Yue Qiu; Zhijia Liu; Zhongwei Zhang
• Keywords: Honeycomb structure; Honeycomb; Chemical vapor infiltration

The high-resolution spacecraft poses an urgent need for opto-mechanical structure with ultra-high stability and light-weight. Owing to the advantages of both carbon fiber-reinforced carbon-based composites (C/C composites) honeycomb sandwich structure, a novel C/C strategy is proposed in this study. It was fabricated by using weaving fabrics Chemical Vapor Infiltration (CVI) process, then tested under out-of-plane compression. Taking weave wall, anisotropy characteristics damage mechanism composites, as well parameters core size, multi-scale model established validated investigate mechanical behavior structure. effects influence factors (side length, thickness height core) on properties mode are investigated. results demonstrate that optimal sizes improving light-weight high load-bearing integration performance l = 5 mm–7.5 mm t 0.3 mm–0.4 mm. matrix occurs middle region core, while fiber at end when its reaches 15 This study helpful design optimization spacecraft.