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DTIC ADA216226: A Study of Failure Characteristics in Thermoplastic... |
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by Defense Technical Information Center |
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The purpose of this thesis was to determine (both |
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experimentally and analytically) the initiation and |
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progression of failure, stress-strain response, and the |
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failure loads of Graphite/Polyetheretherketone (Gr/PEEK) |
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laminates, incorporating an eccentric 0.4 inch circular |
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discontinuity, loaded in axial tension at room |
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temperature. For each ply lay-up, three values of |
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eccentricity were considered (the three values of |
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eccentricity were determined by the hole location within |
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each specimen). In addition, experimentation was |
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conducted to study the effects of boundary conditions on |
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the failure characteristics of the Gr/PEEK laminates; |
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this was accomplished through the use of a special |
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mounting fixture which allowed in-plane rotation of the |
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specimens. Finally, experimentation was conducted, using |
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photoelasticity, to verify the gross stress states of the |
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Gr/PEEK laminates predicted by the analytical study. |
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Analytically, a nonlinear material finite element program |
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was used to predict the initiation and progression of |
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failure, stress-strain response, and the failure loads of |
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the Gr/Peek laminates. In addition, the effects of |
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boundary conditions on the failure modes of the Gr/Peek |
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laminates was studied analytically. And finally, the |
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gross stress states of the Gr/PEEK laminates were |
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considered in the analytical portion of this thesis. |
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Date Published: 2018-02-24 00:50:34 |
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Identifier: DTIC_ADA216226 |
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Item Size: 98191984 |
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Language: english |
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Media Type: texts |
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# Topics |
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DTIC Archive; Daniels, John A ; AIR F... |
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@chris85 |
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