The effect of free edges on inter-laminar performance of curved laminates

Tatiana Kim; Timothy Fletcher; Timothy Dodwell; Richard Butler; Robert Scheichl; Jesper Ankersen; Richard Newley

doi:10.2514/MSDM15

The effect of free edges on inter-laminar performance of curved laminates

Tatiana Kim, Timothy Fletcher, Timothy Dodwell, Richard Butler, Robert Scheichl, Jesper Ankersen, Richard Newley

GKN Aerospace

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

3 Citations (SciVal)

Abstract

A method for an assessment of the edge effect in curved laminates under four-point bend test is presented. The methodology uses ABAQUS FE analysis and the results are compared to the test results. FE analysis suggests that increase in strength from curved laminated with free edges to equivalent infinitely wide laminates can be as significant as 60%-120%. A way of reducing the edge effect by applying a thick layer of resin to the free edges is investigated using the developed methodology and compared against test results. Up to 19% increase in strength of curved elements with edge treatment has been confirmed in tests. Detailed FE analysis suggests that even greater edge effect mitigation, and therefore further increase in element strength, can be achieved if the contrast between the properties of the inter-laminar material and the resin used in edge treatment becomes smaller.

Original language	English
Title of host publication	Proceedings of the 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
Publisher	American Institute of Aeronautics and Astronautics Inc.
ISBN (Print)	9781624103421
DOIs	https://doi.org/10.2514/MSDM15
Publication status	Published - 2015
Event	56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 2015 - Kissimmee, USA United States Duration: 5 Jan 2015 → 9 Jan 2015

Conference

Conference	56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 2015
Country/Territory	USA United States
City	Kissimmee
Period	5/01/15 → 9/01/15

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10.2514/MSDM15

Cite this

Kim, T., Fletcher, T., Dodwell, T., Butler, R., Scheichl, R., Ankersen, J., & Newley, R. (2015). The effect of free edges on inter-laminar performance of curved laminates. In Proceedings of the 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference Article AIAA 2015-0968 American Institute of Aeronautics and Astronautics Inc.. https://doi.org/10.2514/MSDM15

The effect of free edges on inter-laminar performance of curved laminates. / Kim, Tatiana; Fletcher, Timothy; Dodwell, Timothy et al.
Proceedings of the 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. American Institute of Aeronautics and Astronautics Inc., 2015. AIAA 2015-0968.

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

Kim, T, Fletcher, T, Dodwell, T, Butler, R, Scheichl, R, Ankersen, J & Newley, R 2015, The effect of free edges on inter-laminar performance of curved laminates. in Proceedings of the 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference., AIAA 2015-0968, American Institute of Aeronautics and Astronautics Inc., 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 2015, Kissimmee, USA United States, 5/01/15. https://doi.org/10.2514/MSDM15

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abstract = "A method for an assessment of the edge effect in curved laminates under four-point bend test is presented. The methodology uses ABAQUS FE analysis and the results are compared to the test results. FE analysis suggests that increase in strength from curved laminated with free edges to equivalent infinitely wide laminates can be as significant as 60%-120%. A way of reducing the edge effect by applying a thick layer of resin to the free edges is investigated using the developed methodology and compared against test results. Up to 19% increase in strength of curved elements with edge treatment has been confirmed in tests. Detailed FE analysis suggests that even greater edge effect mitigation, and therefore further increase in element strength, can be achieved if the contrast between the properties of the inter-laminar material and the resin used in edge treatment becomes smaller.",

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doi = "10.2514/MSDM15",

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AU - Kim, Tatiana

AU - Fletcher, Timothy

AU - Dodwell, Timothy

AU - Butler, Richard

AU - Scheichl, Robert

AU - Ankersen, Jesper

AU - Newley, Richard

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N2 - A method for an assessment of the edge effect in curved laminates under four-point bend test is presented. The methodology uses ABAQUS FE analysis and the results are compared to the test results. FE analysis suggests that increase in strength from curved laminated with free edges to equivalent infinitely wide laminates can be as significant as 60%-120%. A way of reducing the edge effect by applying a thick layer of resin to the free edges is investigated using the developed methodology and compared against test results. Up to 19% increase in strength of curved elements with edge treatment has been confirmed in tests. Detailed FE analysis suggests that even greater edge effect mitigation, and therefore further increase in element strength, can be achieved if the contrast between the properties of the inter-laminar material and the resin used in edge treatment becomes smaller.

AB - A method for an assessment of the edge effect in curved laminates under four-point bend test is presented. The methodology uses ABAQUS FE analysis and the results are compared to the test results. FE analysis suggests that increase in strength from curved laminated with free edges to equivalent infinitely wide laminates can be as significant as 60%-120%. A way of reducing the edge effect by applying a thick layer of resin to the free edges is investigated using the developed methodology and compared against test results. Up to 19% increase in strength of curved elements with edge treatment has been confirmed in tests. Detailed FE analysis suggests that even greater edge effect mitigation, and therefore further increase in element strength, can be achieved if the contrast between the properties of the inter-laminar material and the resin used in edge treatment becomes smaller.

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The effect of free edges on inter-laminar performance of curved laminates

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