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An experimental investigation of the influence of delamination growth on the residual strength of impacted laminates
Aeronautical Research Institute of Sweden.
Mechanical Sciences Sector, DERA Farnborough.
2001 (English)In: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 32, no 9, p. 1229-1235Article in journal (Refereed) Published
Abstract [en]

This study concerns an experimental investigation to establish data for validation of residual strength models for impacted composite panels. The work focuses on compression tests of panels with embedded artificial delaminations at various depths. Accompanying tests on undamaged and impact-damaged panels are reported and the relevance of the tests on artificially delaminated panels is assessed. In the experiments both the artificially delaminated and the impacted plates failed by delamination growth. Consequently, the same mechanism governed failure in the two cases. Hence, the artificially delaminated plate test is reliable for validation of methods developed for analysis of the residual strength of impact-damaged panels. However, for impacted plates, the load at global plate buckling was consistently 10% lower than that of the artificially delaminated plates and 20% lower than that of the undamaged plates. Hence, conservative prediction of the global buckling load of an impacted composite panel requires methods that consider influence of stiffness reduction of the damaged zone

Place, publisher, year, edition, pages
2001. Vol. 32, no 9, p. 1229-1235
Identifiers
URN: urn:nbn:se:ltu:diva-13086DOI: 10.1016/S1359-835X(01)00075-6Local ID: c3fc63a0-0e81-11dc-b9dd-000ea68e967bOAI: oai:DiVA.org:ltu-13086DiVA, id: diva2:986037
Note
Upprättat; 2001; 20070530 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-06-14Bibliographically approved

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