Multi-stage composites
AssigneePresident and Fellows of Harvard College
InventorsJu-Hee SO, Alok Suryavamsee TAYI, Rui M.D. NUNES, George M. WHITESIDES
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Abstract
Multi-stage composite materials, their preparation, and their uses are described. A composite includes a first layer of a first material contributing to mechanical strength of the composite having a first length, and a second layer of a second material contributing to the mechanical strength of the composite having a second length, wherein the second length is greater than the first length, wherein the second length of the second layer is affixed to the first length of the first layer at both ends of the first and second lengths so that the second layer is spaced apart from the first layer.
Claims21
A composite, comprising:
- a first layer of a first material having a first length requiring a first load to produce each unit of incremental extension;
- a second layer of a second material having a second length requiring a second load to produce each unit of incremental extension,
- wherein the second length is greater than the first length,
- wherein the second length of the second layer is affixed to the first length of the first layer at both ends of the first and second lengths so that the second layer is spaced apart from the first layer;
- and
- wherein, extension of the composite from the first length to the second length results in at least one change in the load required to produce each unit of incremental extension.
A method of preparing a composite, comprising:
- providing a first layer of a first material having a first length requiring a first load to produce each unit of incremental extension;
- providing a second layer of a second material having a second length, requiring a second load to produce each unit of incremental extension wherein the second length is greater than the first length;
- and
- affixing the second length of the second layer to the first length of the first layer at both ends of the first and second lengths so that the second layer is spaced apart from the first layer;
- and
- wherein, extension of the composite from the first length to the second length results in at least one change in the load required to produce each unit of incremental extension of the composite.
A device, comprising:
- a first layer of a first material having a first length requiring a first load to produce each unit of incremental extension;
- and
- a second layer of a second material having a second length requiring a second load to produce each unit of incremental extension, wherein the second length is greater than the first length,
- wherein the second length of the second layer is affixed to the first length of the first layer at both ends of the first and second lengths,
- wherein the second layer is spaced apart from the first layer in an unengaged state,
- wherein the second layer is no longer spaced apart from the first layer in an engaged state.
Dependencies are inferred from the claim text.