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Data transfer in a broadband ionospheric radio channel is an actual problem currently. Ionospheric communication channel are characterized by non-stationarity, a hard interference situation, multipath propagation and dispersion distortion of signals. The frequency dispersion of the ionospheric channel is one of the most significant obstacles to the operation of decameter-band communication systems...
This paper describes a novel experimental rig and associated experimental method developed to investigate composite fabric/tool contact at the microscopic scale. A key feature of this method is that it enables direct observation of real contact at the scale of fibres and the evolution of this contact under simultaneous application of shear and compression loads. To observe the contact, an optical...
In order to account for interfacial friction of composite materials, an analytical model based on contact geometry and local friction is proposed. A contact area includes several types of microcontacts depending on reinforcement materials and their shape. A proportion between these areas is defined by in-plane contact geometry. The model applied to a fibre-reinforced composite results in the dependence...
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