This work presents a combined experimental and numerical approach to the design and analysis of tape-laid thermoplastic composite cryogenic tanks. A detailed material and defect characterisation of automated tape-laid CF/PEEK is undertaken using optical micrography and 3D X-ray CT (computed tomography) as well as cryogenic testing to investigate damage formation. Resulting material data is used as input for a novel XFEM (extended finite element method)-cohesive zone methodology which is used to predict intra- and inter-ply damage in an internally pressurised cryogenic tank. An optimised tank lay-up is presented and analysed using the numerical method to ensure resistance to microcrack formation and fuel leakage through the tank walls under operating loads.
|Number of pages||13|
|Journal||Composites part a-Applied science and manufacturing|
|Publication status||Published - 7 Sep 2015|
- B. Defects
- C. Finite element analysis (FEA)
- D. Non-destructive testing
- E. Lay-up (manual/automated)