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![Part of a laminated composite stiffened panel with a local delaamination that grows (delta A) with increasing axial compression](thumbnails/s136.jpg) |
![Load-end shortening curves without and with delamination growth (delta A)](thumbnails/s137.jpg) |
![Stiffened panel with original local delaminated area, A](thumbnails/s138.jpg) |
![Finite element model of the stiffened panel with refined discretization covering the local delaminated area plus more in order accurately to predict delamination growth, delta A](thumbnails/s139.jpg) |
![Very local post-buckling of the delamiated area. top=entire panel; bottom = zoomed post-buckled delaminated area, A + delta A](thumbnails/s140.jpg) |
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Part of a laminated composite stiffened panel with a local delaamination that grows (delta A) with increasing axial compression |
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Load-end shortening curves without and with delamination growth (delta A) |
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Stiffened panel with original local delaminated area, A |
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Finite element model of the stiffened panel with refined discretization covering the local delaminated area plus more in order accurately to predict delamination growth, delta A |
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Very local post-buckling of the delamiated area. top=entire panel; bottom = zoomed post-buckled delaminated area, A + delta A |
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![(top) Overall skin buckling with associated stringer deformation; (bottom) enlarged view of the localy post-buckled delaminated region, A + delta A](thumbnails/s141.jpg) |
![Circumferentially corrugated cylindrical shell](thumbnails/s142.jpg) |
![Starting design and optimized design of a circumferentially corrugated cylindrical shell with external T-shaped rings](thumbnails/s143.jpg) |
![Circumferentially corrugated can buckled under hydrostatic compression](thumbnails/s144.jpg) |
![General and local buckling of axially compressed grid-stiffened composite cylindrical shells](thumbnails/s145.jpg) |
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(top) Overall skin buckling with associated stringer deformation; (bottom) enlarged view of the localy post-buckled delaminated region, A + delta A |
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Circumferentially corrugated cylindrical shell |
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Starting design and optimized design of a circumferentially corrugated cylindrical shell with external T-shaped rings |
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Circumferentially corrugated can buckled under hydrostatic compression |
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General and local buckling of axially compressed grid-stiffened composite cylindrical shells |
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![Part of the fuselage of a B-52 showing many local skin buckles in a region where there is high in-plane shear loading](thumbnails/s146.jpg) |
![Stiffened fuselage panel: Allowing local skin post-buckling during the design phase of a project (Weight 2) produces lighter optimized designs](thumbnails/s147.jpg) |
![Open cylindrical shell with a single mid-length slender ring and with widely spaced stringers](thumbnails/s148.jpg) |
![180-degree torqued widely ring/stringer-stiffened cylindrical shell, The post-critical model deformation and test results agree.](thumbnails/s149.jpg) |
![Post-buckling of the panel from test (left) and theory (right)](thumbnails/s150.jpg) |
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Part of the fuselage of a B-52 showing many local skin buckles in a region where there is high in-plane shear loading |
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Stiffened fuselage panel: Allowing local skin post-buckling during the design phase of a project (Weight 2) produces lighter optimized designs |
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Open cylindrical shell with a single mid-length slender ring and with widely spaced stringers |
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180-degree torqued widely ring/stringer-stiffened cylindrical shell, The post-critical model deformation and test results agree. |
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Post-buckling of the panel from test (left) and theory (right) |
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