Hingeless, large-throw negative stiffness structure
First Claim
1. A negative stiffness structure, comprising:
- at least one flexible tensile member having a first end and a second end, the first end coupled to a first structure; and
a first curved compressive member having a first end and a second end, the first end coupled to a second structure, the second end of the first curved compressive member directly coupled to the second end of the tensile member, whereina length of the tensile member is greater than a length of the first curved compressive member, anda tip of the negative stiffness structure is configured to exhibit a negative stiffness mechanical response to a load applied to the tip, the negative stiffness mechanical response acting in a direction orthogonal to the length of the tensile member.
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Accused Products
Abstract
A negative stiffness structure for vibration isolation, shock mitigation, and/or signal processing includes a flexible tensile member and a curved compressive member. A first end of the tensile member is attached to a first structure. A first end of the curved compressive member is coupled to a first structure and a second end of the curved compressive member is coupled to a second end of the flexible tensile member. A length of the tensile member is greater than a length of the compressive member. A tip of the negative stiffness structure is configured to exhibit a negative stiffness mechanical response to a load applied to the tip. The negative stiffness mechanical response acts in a direction orthogonal to the length of the tensile member.
11 Citations
15 Claims
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1. A negative stiffness structure, comprising:
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at least one flexible tensile member having a first end and a second end, the first end coupled to a first structure; and a first curved compressive member having a first end and a second end, the first end coupled to a second structure, the second end of the first curved compressive member directly coupled to the second end of the tensile member, wherein a length of the tensile member is greater than a length of the first curved compressive member, and a tip of the negative stiffness structure is configured to exhibit a negative stiffness mechanical response to a load applied to the tip, the negative stiffness mechanical response acting in a direction orthogonal to the length of the tensile member. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 13, 14, 15)
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4. A negative stiffness structure, comprising:
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at least one flexible tensile member having a first end and a second end, the first end coupled to a first structure; a first curved compressive member having a first end and a second end, the first end coupled to a second structure, the second end coupled to the second end of the tensile member; and a second curved compressive member having a first end coupled to the second structure and a second end coupled to the second end of the tensile member, wherein; a length of the tensile member is greater than a length of the first curved compressive member, a tip of the negative stiffness structure is configured to exhibit a negative stiffness mechanical response to a load applied to the tip, the negative stiffness mechanical response acting in a direction orthogonal to the length of the tensile member, and the first and second curved compressive members are cosine shaped.
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11. A negative stiffness structure, comprising:
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at least one flexible tensile member having a first end and a second end, the first end coupled to a first structure; and a first curved compressive member having a first end and a second end, the first end coupled to a second structure, the second end coupled to the second end of the tensile member, wherein; a length of the tensile member is greater than a length of the first curved compressive member, a tip of the negative stiffness structure is configured to exhibit a negative stiffness mechanical response to a load applied to the tip, the negative stiffness mechanical response acting in a direction orthogonal to the length of the tensile member, and wherein the first curved compressive member has a non-uniform thickness.
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12. A negative stiffness structure, comprising:
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at least one flexible tensile member having a first end and a second end, the first end coupled to a first structure; and a first curved compressive member having a first end and a second end, the first end coupled to a second structure, the second end coupled to the second end of the tensile member, wherein; a length of the tensile member is greater than a length of the first curved compressive member, a tip of the negative stiffness structure is configured to exhibit a negative stiffness mechanical response to a load applied to the tip, the negative stiffness mechanical response acting in a direction orthogonal to the length of the tensile member, and the first curved compressive member comprises a stack of a plurality of curved compressive members.
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Specification