| 摘要 |
Harmonic board in composite material used as a construction element in the production of resonance chambers for stringed musical instruments, structures for boats, furniture, etc. which are subjected to mechanical bending stresses, the board defining a substantially parallelepiped structure, or comparable thereto, consisting of an upper face on which the mechanical stress acts and which is subjected to compression, a lower face subjected to tension and an intermediate volume, the board consisting of a base panel (14) made of light material defining the shape of the board, the two counter-opposed faces of the panel (14) being connected by a plurality of transverse stiffening elements (16) housed in through apertures (13) uniformly distributed on a substantial part of the surface of the panel (14), the faces of the panel (14) being lined with a respective covering layer (18) made of a web of high resistance fibers impregnated with resin.
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