Enhanced composites via selective interfacial modification
| DWPI Title: Laminate e.g. composite laminate, has first pattern and second pattern that are configured to increase toughness of laminate by increasing resistance of crack growth in matrix material between first ply and second ply |
| Abstract: A laminate comprising a first ply, a second ply, and a third ply which sandwiching the second ply between the first ply and the third ply. The laminate further includes a first plurality of interfacial modifiers arranged between opposing faces of the first ply and the second ply. The first plurality of interfacial modifiers are arranged in a first pattern. The laminate includes a second plurality of interfacial modifiers arranged between opposing faces of the second ply and the third ply such that the first plurality of interfacial modifiers and the second plurality of interfacial modifiers are arranged on opposite faces of the second ply. The second plurality of interfacial modifiers are arranged in a second pattern. The first pattern and the second pattern are configured to increase crack growth resistance of the laminate by selectively toughening portions of the laminate to control propagation of interfacial cracks within the laminate. |
| Use: Multi-layer composite laminate. |
| Advantage: The first pattern and the second pattern are configured to increase crack growth resistance of the laminate by selectively toughening portions of the laminates to control propagation of interfacial cracks within the laminates. The first and second pattern is configured to selectively toughen a portion of the first ply and/or the second ply of the composite laminate to increase the crack growth rate of the polyurethane laminate. The second pattern increases the thickness of the third ply to reduce the amount of the interfacial modifier in the first pattern, thus, increasing the strength of the adhesive between the second and third plies. The third pattern can be configured to decrease the thicknesses of the second, third, and fourth plies to reduce or prevent the propagation of inter-layer interfacial crack propagation within the composite laminating material. |
| Novelty: The laminate (100) comprises a matrix material encapsulating three plies, where the matrix material between two of the plies directly bonds opposing faces of the two plies together. The matrix material has two sets of interfacial modifiers (110) arranged in the material wholly between the former and the latter plies. The patterns are designed to increase toughness of the laminate by increasing resistance of crack growth, such that a crack, rather than growing in the matrix, transitions from the matrix between the two former plies to the material between the latter ply and the third ply upon the crack reaching an interfacial modifier. |
| Filed: 3/13/2019 |
| Application Number: US16352004A |
| Tech ID: SD 14813.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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