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Buckling and Growth of Disbonds in Honeycomb Sandwich Structure
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30 dni na zwrot towaru
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The response of honeycomb sandwich structure to§disbond damage, in a compressive stress field,§has been assessed. Two types of disbond were§considered; those extending through the full width of§a panel (through-width) and those enclosed within the§panel boundaries (embedded). For each type§of disbond the failure process was established§through four-point bend testing of 56 sandwich§specimens. For both types of disbond, failure was§found to be governed by buckling-driven disbond§growth and, consequently, models of buckling and§disbond growth were developed. Linear Winkler beam§and plate models were used to predict disbond§buckling. Non-linear Winkler beam and§plate models were then developed to predict§post-buckling behaviour and the initiation of§disbond growth, through a fracture mechanics§analysis. All models showed excellent correlation§to test data. The models developed may be used to§assess the criticality of disbond damage in sandwich§structure having thin-gauge, composite face-sheets.
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