Micro-truss materials having in-plane material property variations
First Claim
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1. A micro-truss sheet, including:
- a plurality of first truss members defined by a plurality of first self-propagating polymer waveguides and extending along a first direction;
a plurality of second truss members defined by a plurality of second self-propagating polymer waveguides and extending along a second direction; and
a plurality of third truss members defined by a plurality of third self-propagating polymer waveguides and extending along a third direction;
wherein each truss member has a diameter;
the sheet having a length substantially greater than its thickness, andthe sheet having a first region comprising a plurality of first unit cells and a second region comprising a plurality of second unit cells, the first region and the second region being separated along the length of the sheet,wherein all the truss members within the first unit cells have the same diameter,wherein all the truss members within the second unit cells have the same diameter,wherein the diameter of each of the plurality of first truss members, the plurality of second truss members, and the plurality of third truss members within the first unit cellsin the first regionis at least 10% greater thanthe diameter of each of the plurality of first truss members, the plurality of second truss members, and the plurality of third truss members within the second unit cellsin the second region, andwherein the micro-truss sheet forms one continuous body, having a gradient in the diameter of the truss members of the plurality of first truss members, the plurality of second truss members, and the plurality of third truss members, along the length of the sheet.
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Abstract
A micro-truss sheet having material properties varying across the sheet. The sheet may include a plurality of truss members intersecting at nodes. The diameter of the truss members at one point in the sheet may differ from the diameter of the truss members at another point in the sheet. In one embodiment the spacing between adjacent truss members may be different in one part of the sheet from the spacing between adjacent truss members in another part of the sheet.
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Citations
25 Claims
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1. A micro-truss sheet, including:
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a plurality of first truss members defined by a plurality of first self-propagating polymer waveguides and extending along a first direction; a plurality of second truss members defined by a plurality of second self-propagating polymer waveguides and extending along a second direction; and a plurality of third truss members defined by a plurality of third self-propagating polymer waveguides and extending along a third direction; wherein each truss member has a diameter; the sheet having a length substantially greater than its thickness, and the sheet having a first region comprising a plurality of first unit cells and a second region comprising a plurality of second unit cells, the first region and the second region being separated along the length of the sheet, wherein all the truss members within the first unit cells have the same diameter, wherein all the truss members within the second unit cells have the same diameter, wherein the diameter of each of the plurality of first truss members, the plurality of second truss members, and the plurality of third truss members within the first unit cells in the first region is at least 10% greater than the diameter of each of the plurality of first truss members, the plurality of second truss members, and the plurality of third truss members within the second unit cells in the second region, and wherein the micro-truss sheet forms one continuous body, having a gradient in the diameter of the truss members of the plurality of first truss members, the plurality of second truss members, and the plurality of third truss members, along the length of the sheet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A three-dimensional ordered open-cellular sheet,
having a length substantially greater than its thickness, and including: -
(i) a first three-dimensional interconnected pattern of truss members defined by a plurality of first self-propagating polymer waveguides, in a first region of the sheet, the first three-dimensional interconnected pattern of truss members comprising; a plurality of first truss members defined by a plurality of first self-propagating polymer waveguides and extending along a first direction; a plurality of second truss members defined by a plurality of second self-propagating polymer waveguides and extending along a second direction; and a plurality of third truss members defined by a plurality of third self-propagating polymer waveguides and extending along a third direction; the first region of the sheet comprising a plurality of first unit cells; (ii) a second three-dimensional interconnected pattern of truss members defined by a plurality of second self-propagating polymer waveguides, in a second region of the sheet, separated from the first region along the length of the sheet, the second three-dimensional interconnected pattern of truss members comprising; a plurality of first truss members defined by a plurality of first self-propagating polymer waveguides and extending along a first direction; a plurality of second truss members defined by a plurality of second self-propagating polymer waveguides and extending along a second direction; and a plurality of third truss members defined by a plurality of third self-propagating polymer waveguides and extending along a third direction; the second region of the sheet comprising a plurality of second unit cells; the first three-dimensional interconnected pattern differing from the second three-dimensional interconnected pattern; and (iii) a transition connected with the first three-dimensional interconnected pattern of truss members and the second three-dimensional interconnected pattern of truss members as one continuous body, the transition comprising; a plurality of first truss members defined by a plurality of first self-propagating polymer waveguides and extending along a first direction; a plurality of second truss members defined by a plurality of second self-propagating polymer waveguides and extending along a second direction; and a plurality of third truss members defined by a plurality of third self-propagating polymer waveguides and extending along a third direction; wherein the transition has a gradient in the diameter of the truss members of the plurality of first truss members, the plurality of second truss members, and the plurality of third truss members, along the length of the three-dimensional ordered open-cellular sheet, wherein all the truss members within the first unit cells have the same diameter, wherein all the truss members within the second unit cells have the same diameter, wherein the diameter of each of the plurality of first truss members, the plurality of second truss members, and the plurality of third truss members within the first unit cells in the first region is at least 10% greater than the diameter of each of the plurality of first truss members, the plurality of second truss members, and the plurality of third truss members within the second unit cells in the second region. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification