| 摘要 |
A structure consisting of a sheet of foamed material having a first side and a second side, at least one sheet of reinforcing material having a first side and a second side, the first side of the sheet of reinforcing material being attached to the first side of the sheet of foamed material, the tensile strength and stiffness of the sheet of reinforcing material being greater parallel to the plane of the sheet of reinforcing material than the compressive strength and stiffness of the sheet of foamed material parallel to the plane of the sheet of foamed material, the structure being deformed so that the second side of the sheet of reinforcing material is in tension and the second side of the sheet of foamed material is in compression. A method consisting of the step of bending such a structure so that the second side of the sheet of reinforcing material is in tension and the second side of the sheet of foamed material is in compression.
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