Stress-Based Health Assessment of Composite Open-End Cylindrical Laminated Shell with Stepped-Lap Repairs

Abstract:

A three-dimensional finite element model was created in PATRAN to perform stress distribution into the influence of disbonded adhesive in stepped-lap repairs of composite open-end cylindrical laminated shell. Extracted and studied the value of the stress on every ply, and every node, ordered by the X coordinate. A study has been presented that the rim of patch is greatly affected by disbonded types, however, the central area of the patch is less affected relatively, especially between ±20mm, that the diameter is equal to the diameter of the damage, the stresses are flatly changed. And for the whole model, the maximum is in the sixth layer, so that the internal area is the most easily to be damaged. Therefore, it should be force on this special area in experimental health assessment such as using piezoelectric elements. It could provide certain maintenance basis for the future practical repair.

• Periodical: Advanced Materials Research (Volumes 393-395)
• Pages: 297-303
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.393-395.297
• Online since: November 2011
• Authors: Jian Xin Xu, Chen Dou, Ding He Li
• Keywords: Composite Open-End Cylindrical Laminated Shell, Disbonded, Health Assessment, Stepped-Lap Repair

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