Sublaminate library generation for optimization of multi-panel composite parts
First Claim
1. A method of creating a library of sublaminates used in optimizing fiber orientations of a multi-layer composite part subdivided into panels that each comprise a fraction of the area of the composite part, the method comprising:
- creating an integer tree of sublaminates that each comprise consecutively stacked layers having a unique sequence of fiber orientations;
checking the sublaminates, based on the fiber orientations of the consecutively stacked layers of the sublaminates, for compliance with stacking sequence rules that constrain how fiber orientations are sequenced;
pruning branches from the integer tree by removing sublaminates that do not comply with the stacking sequence rules;
generating new sublaminates that each include an additional layer, by, for each of multiple fiber orientations;
selecting a sublaminate that was not removed; and
creating a new branch within the integer tree by generating a new sublaminate by appending a layer having the fiber orientation to the selected sublaminate;
repeating the checking, the removing, and the generating at the integer tree until a maximum number of layers has been reached; and
storing the sublaminates in memory as a library of available sublaminates for designing the composite part.
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Abstract
Systems and methods are provided for composite part design. One embodiment is a method of creating a library of sublaminates used in optimizing fiber orientations of a multi-layer composite part subdivided along its depth into panels that each comprise a fraction of the area of the composite part. The method includes creating sublaminates that each comprise consecutively stacked layers having a unique sequence of fiber orientations, checking the sublaminates for compliance with stacking sequence rules that constrain how fiber orientations are sequenced, and removing sublaminates that do not comply with the stacking sequence rules. The method further includes generating new sublaminates that each include an additional layer, by, for each of multiple fiber orientations: selecting a sublaminate that was not remove, and generating a new sublaminate by appending an additional layer having the fiber orientation to the selected sublaminate.
7 Citations
24 Claims
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1. A method of creating a library of sublaminates used in optimizing fiber orientations of a multi-layer composite part subdivided into panels that each comprise a fraction of the area of the composite part, the method comprising:
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creating an integer tree of sublaminates that each comprise consecutively stacked layers having a unique sequence of fiber orientations; checking the sublaminates, based on the fiber orientations of the consecutively stacked layers of the sublaminates, for compliance with stacking sequence rules that constrain how fiber orientations are sequenced; pruning branches from the integer tree by removing sublaminates that do not comply with the stacking sequence rules; generating new sublaminates that each include an additional layer, by, for each of multiple fiber orientations; selecting a sublaminate that was not removed; and creating a new branch within the integer tree by generating a new sublaminate by appending a layer having the fiber orientation to the selected sublaminate; repeating the checking, the removing, and the generating at the integer tree until a maximum number of layers has been reached; and storing the sublaminates in memory as a library of available sublaminates for designing the composite part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A non-transitory computer readable medium embodying programmed instructions which, when executed by a processor, are operable for performing a method of creating a library of sublaminates used in optimizing fiber orientations of a multi-layer composite part subdivided into panels that each comprise a fraction of the area of the composite part, the method comprising:
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creating an integer tree of sublaminates that each comprise consecutively stacked layers having a unique sequence of fiber orientations; checking the sublaminates, based on the fiber orientations of the consecutively stacked layers of the sublaminates, for compliance with stacking sequence rules that constrain how fiber orientations are sequenced; pruning branches from the integer tree by removing sublaminates that do not comply with the stacking sequence rules; generating new sublaminates that each include an additional layer, by, for each of multiple fiber orientations; selecting a sublaminate that was not removed; and creating a new branch within the integer tree by generating a new sublaminate by appending a layer having the fiber orientation to the selected sublaminate; repeating the checking, the removing, and the generating at the integer tree until a maximum number of layers has been reached; and storing the sublaminates in memory as a library of available sublaminates for designing the composite part. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An apparatus comprising:
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a memory that stores stacking sequence rules that constrain how fiber orientations are permitted to be sequenced within a multi-layer composite part subdivided into panels that each comprise a fraction of the area of the composite part; and a controller that creates a library of sublaminates used in optimizing fiber orientations of the composite part, by;
creating an integer tree of sublaminates that each comprise consecutively stacked layers having a unique sequence of fiber orientations, checking the sublaminates for compliance with the stacking sequence rules based on the fiber orientations of the consecutively stacked layers of the sublaminates; and
pruning branches from the integer tree by removing sublaminates that do not comply with the stacking sequence rules,the controller generates new sublaminates that each include an additional layer, by, for each of multiple fiber orientations;
selecting a sublaminate that was not removed, and creating a new branch within the integer tree by generating a new sublaminate by appending a layer having the fiber orientation to the selected sublaminate, andthe controller repeats the checking, the removing, and the generating at the integer tree until a maximum number of layers has been reached, and stores the sublaminates in the memory as a library of available sublaminates for designing the composite part. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification