Abstract: Analysis of honeycomb sandwich payload adapter under equivalent axial compression load with secondary bonding for the reinforced hole is carried out based on CZM approach using tested fracture properties. For the structurally qualified design ultimate load, both post test NDT and CZM results, did not show the occurrence of any debonds. The parametric study shows that when the normal debond strength of the adhesive between the primary shell skin to secondary reinforcement around the hole reduces from the design configuration value of 20 MPa to a very low value of 3MPa, incipient of debond occurs on the tensile region of the hole retaining almost the critical buckling capability. With 2MPa normal bond strength, the failure load reduces by 12.7% and with 1MPa; the failure load reduces by 37%. Present study establishes in bringing out the minimum bond strength required for a secondary bond around holes following an equivalent solid honeycomb core model.
Keywords: CZM model, FWT value – Interfacial normal bond strength, honeycomb core.
Title: Assessment on the Critical Failure Load of a Composite Structure with a Hole Reinforced Using Secondary Bonding
Author: Hari Krishnan G., Dr. Ramesh Kumar R, Dr. K. C. Gopalakrishnan
International Journal of Mechanical and Industrial Technology
ISSN 2348-7593 (Online)
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