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Adjacent Ply

The Experts below are selected from a list of 36 Experts worldwide ranked by ideXlab platform

Xiaojing Gong – 1st expert on this subject based on the ideXlab platform

  • Experimental study of the influence of Ply orientation on DCB mode-I delamination behavior by using multidirectional fully isotropic carbon/epoxy laminates
    Composite Structures, 2017
    Co-Authors: M.s. Bin Mohamed Rehan, J. Rousseau, S. Fontaine, Xiaojing Gong

    Abstract:

    The influence of Ply orientation on the resistance to mode I delamination of multidirectional composite laminates can be assessed by Double Cantilever Beam (DCB) tests. However, one difficulty is to uncouple the global and local effects due to the stacking sequence, which is necessary for a conclusive analysis. In the present work six multidirectional DCB specimens were designed so as to obtain an uncoupled fully isotropic elastic behavior, with the same properties for the entire laminate and the two sub laminates separated by the pre-crack at mid-plane. These specimens have different Ply orientations, but their elastic properties are exactly the same. Hence differences in mode I delamination behavior are only due to local fiber orientation effects. Experimental results show that the measured toughness at the crack initiation decreases with both Adjacent and sub-Adjacent Ply angles. During the crack propagation, the plateau value of the R-curve increases with the Ply angle of Adjacent plies.

  • effet de l orientation des fibres des plis Adjacents sur la resistance au delaminage en mode i pur effect of the fibre s orientation of Adjacent Ply on pure mode i fracture toughness
    JNC 16, 2009
    Co-Authors: Xiaojing Gong, Anita Hurez

    Abstract:

    Ce travail concerne l’etude de l’effet de l’orientation des fibres des plis Adjacents a la fissure dans une eprouvette DCB (Double Cantilever Beam) sur la resistance au delaminage en mode I pur. Afin d’isoler l’influence de l’orientation l’etude porte sur des stratifies particuliers ayant tous les memes matrices de comportement global A B D. Les resultats experimentaux montrent une grande variation de resistance au delaminage GIC et des courbes R selon l’orientation des plis situes de part et d’autre du plan de fissure. Une modelisation par elements finis permet de mettre en evidence l’importance de l’etat de contraintes locales et donc de l’endommagement au voisinage du fond de fissure

George S. Springer – 2nd expert on this subject based on the ideXlab platform

  • Delaminations in composite plates under transverse impact loads — Experimental results
    Composite Structures, 2003
    Co-Authors: Scott R. Finn, Ye-fei He, George S. Springer

    Abstract:

    Abstract Tests were performed measuring the locations and geometries of delaminations in Fiberite T300/976 graphite/epoxy, Fiberite IM7/977-2 graphite-toughened epoxy, and ICI APC-2 graphite/PEEK plates subjected to transverse impact loads. The data provide specific information on the effects of impactor velocity, impactor mass, material, thickness of back Ply group, difference in fiber orientation between Adjacent Ply groups, plate thickness, and impactor nose radius. The data were compared to the results of the Finn-Springer model. The model was found to describe the data with reasonable accuracy.

  • Composite Plates Impact Damage: An Atlas
    , 1991
    Co-Authors: Scott R. Finn, George S. Springer

    Abstract:

    The present volume on impact damage in composite plates presents an extensive compendium of visual and graphic data regarding a variety of material and impactor parameters. The photographs are taken with X-ray and C-scan imaging in conjunction with a dye penetrant to show matrix cracks and delaminations. Impact and static-loading tests are performed on plates of graphite-epoxy, graphite-toughened epoxy, and graphite-PEEK materials. The images are presented to yield specific visual data regarding such parameters as impactor velocity, thickness of the back Ply group, impactor nose radius, and the effects of multiple delaminations. The images are grouped in eight subsets that correspond to parameters including plate length, material, and the difference in fiber orientation between Adjacent Ply groups. This substantial volume represents a systematic effort to study the effects of several material parameters on impact damage.

Scott R. Finn – 3rd expert on this subject based on the ideXlab platform

  • Delaminations in composite plates under transverse impact loads — Experimental results
    Composite Structures, 2003
    Co-Authors: Scott R. Finn, Ye-fei He, George S. Springer

    Abstract:

    Abstract Tests were performed measuring the locations and geometries of delaminations in Fiberite T300/976 graphite/epoxy, Fiberite IM7/977-2 graphite-toughened epoxy, and ICI APC-2 graphite/PEEK plates subjected to transverse impact loads. The data provide specific information on the effects of impactor velocity, impactor mass, material, thickness of back Ply group, difference in fiber orientation between Adjacent Ply groups, plate thickness, and impactor nose radius. The data were compared to the results of the Finn-Springer model. The model was found to describe the data with reasonable accuracy.

  • Composite Plates Impact Damage: An Atlas
    , 1991
    Co-Authors: Scott R. Finn, George S. Springer

    Abstract:

    The present volume on impact damage in composite plates presents an extensive compendium of visual and graphic data regarding a variety of material and impactor parameters. The photographs are taken with X-ray and C-scan imaging in conjunction with a dye penetrant to show matrix cracks and delaminations. Impact and static-loading tests are performed on plates of graphite-epoxy, graphite-toughened epoxy, and graphite-PEEK materials. The images are presented to yield specific visual data regarding such parameters as impactor velocity, thickness of the back Ply group, impactor nose radius, and the effects of multiple delaminations. The images are grouped in eight subsets that correspond to parameters including plate length, material, and the difference in fiber orientation between Adjacent Ply groups. This substantial volume represents a systematic effort to study the effects of several material parameters on impact damage.