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    • 2. 发明申请
    • ENGINEERED AGGREGATES FOR METAMATERIALS
    • 工程合成元素
    • US20140371353A1
    • 2014-12-18
    • US14308347
    • 2014-06-18
    • California Institute of Technology
    • Stephanie MitchellAnna PandolfiMichael Ortiz
    • C04B14/34C04B24/28
    • C04B14/34C04B14/322C04B24/287C04B28/02C04B2111/2046E04B1/985E04H9/021G10K11/165C04B20/1037C04B20/1051C04B20/1033
    • Materials and Methods for implementing engineered aggregates in metamaterials are provided. The engineered aggregates may be tuned to oscillate resonantly under the influence of an external force improving the dynamic performance of the metamaterial by impeding dynamic excitation. The engineered aggregate generally comprise a multilayer resonant structure having at least a relatively heavy inner core surrounded by at least a compliant coating layer. The geometry and stiffness of the relative layers can be tuned to engineer a desired resonant frequency response within the aggregate for a chosen frequency range. The engineered aggregates are disposed in a matrix material to form a metamaterial. The engineered aggregates may be disposed within a mortar matrix to form a concrete metamaterial suitable for use, for example, in structural applications, including bunkers, shelters, etc.
    • 提供了在超材料中实施工程聚集体的材料和方法。 可以调整工程聚集体在外力的作用下共振地振荡,通过阻碍动态激发改善超材料的动态性能。 工程化骨料通常包括多层共振结构,其至少具有由至少柔顺涂层包围的至少相当重的内核。 可以调整相对层的几何形状和刚度,以在所选择的频率范围内在聚合体内设计所需的谐振频率响应。 将工程聚集体设置在基质材料中以形成超材料。 工程聚集体可以设置在砂浆基质内以形成适合于例如在结构应用中使用的混凝土超材料,包括沙坑,掩体等。
    • 6. 发明授权
    • Cement-graphite composite materials for vibration damping
    • 用于减震的水泥石墨复合材料
    • US08211227B2
    • 2012-07-03
    • US12624979
    • 2009-11-24
    • Deborah Duen Ling ChungSivaraja Muthusamy
    • Deborah Duen Ling ChungSivaraja Muthusamy
    • C09C1/44C04B14/00C04B16/00C04B24/00C04B28/00C01B31/04
    • C04B7/527C04B28/02C04B2111/2046C04B14/024C04B40/0259C04B40/0286
    • This invention provides a material for vibration damping, said material comprising a composite, said composite comprising a cement matrix, and exfoliated graphite that is distributed in said composite. Said cement is preferably hydraulic cement containing calcium silicate. Said exfoliated graphite exhibits a morphology that enables the physical units of exfoliated graphite to connect mechanically. The proportion of exfoliated graphite in the composite is high enough for the exfoliated graphite to connect mechanically in the presence of cement. The proportion of cement in the composite is high enough for the cement to form a continuous matrix in the composite. This invention also provides a material for vibration damping, said material comprising a composite, said composite comprising a continuous cement matrix and a graphite network, said network being mechanically connected. In addition, this invention provides a method for making a material for vibration damping, said method comprising compressing a mixture of exfoliated graphite and cement particles at a pressure that is sufficient to cause the exfoliated graphite to bind the cement particles through mechanical connection between the physical units of exfoliated graphite, and curing the cement in the presence of water that is adequate for the cement particles to bond cementitiously to one another.
    • 本发明提供了一种用于减震的材料,所述材料包括复合材料,所述复合材料包括水泥基质和分散在所述复合材料中的剥离石墨。 所述水泥优选含有硅酸钙的水硬性水泥。 所述剥离石墨表现出使剥离石墨的物理单元机械连接的形态。 复合材料中剥离石墨的比例足够高,使得剥离石墨在水泥存在下机械连接。 水泥在复合材料中的比例足够高,使得水泥在复合材料中形成连续的基体。 本发明还提供了一种用于减振的材料,所述材料包括复合材料,所述复合材料包括连续的水泥基质和石墨网络,所述网络机械连接。 此外,本发明提供了一种用于制造用于减振的材料的方法,所述方法包括在足以使剥离的石墨通过物理上的机械连接使粘合剂颗粒结合的压力下压缩剥离的石墨和水泥颗粒的混合物 单位的剥离石墨,并且在水存在下固化水泥,其足以使水泥颗粒彼此粘结粘结。