| 摘要 |
A system and method are described for the use of shape-memory alloys in repair and retrofit. The shape-memory alloys are used in the form of plates or rods made of shape-memory alloys, or in the form of composite plates (10) or rods consisting of a polymer matrix and shape-memory ribbons or wires. In one aspect of the invention, plastically elongated shape-memory plates are kept at a temperature below their transformation temperature and are adhered onto a component or structure (22). Their temperature is then raised above transformation temperature in order to produce a shortening tendency which transfers corrective forces to the element or structure in order to accomplish certain repair or retrofit objectives (e.g., close cracks (26) or reduce deformations). In another aspect of the invention, the shape-memory plate has a transformation temperature below the ambient temperature and is adhered to the component or structure with prior elongation. Any subsequent damage to the structure which causes plastic elongation of the shape-memory plate activates the shape-memory phenomenon, which now takes place at ambient temperature, and transfers corrective forces to the component or structure. |
