| 摘要 |
<p>The invention concerns a composite beam (18) comprising a web (20) with sinusoidal cross-section and a lower base plate (22). The web (20) consists of a stack of at least a central mat of unidirectional carbon fibres oriented in the direction of the beam height, and aramid fibre and carbon fibre fabrics. In its lower part, the beam (18) is designed to initiate break-off, if an aircraft incorporating the beam crashes. Therefor, the lower base plate (22) is bonded on the sides of the web (20), the lower edge of each of the unidirectional carbon fibre mats is located recessed relative to the corresponding edges of the fabrics and said lower edge has saw-toothed cut-outs.</p> |
