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Rain and solid particle impact damage may produce significant levels of optical degradation in forward-looking IR-transmitting windows on aerospace vehicles. While a significant level of effort is devoted to characterizing the relative erosion resistance of one material compared with another, considerably less effort is devoted to establishing how the particulate impact damage affects a window or...
The complete spatial and temporal interaction of a waterdrop impacting a deformable target can now be described using a three-dimensional finite element model. The advantage of the finite element formulation is that the stresses generated in structurally complex targets can be determined. The geometry of the target is also accurately represented in the model. A brief account of previous waterdrop...
Experiments were conducted to investigate the mechanisms of the liquid-jet impact on liquid and solid surfaces associated with cavitation damage and rain erosion. In this work, a liquid jet of 3 mm diameter, generated using a single impact jet apparatus, was impacted at ca. 600 m s -1 on the surface of water and polymethyl-methacrylate (PMMA) placed 15 mm below the nozzle exit. The various...
For the past twenty-five years the University of Dayton Research Institute has operated the Rain Erosion Test Facility for the United States Air Force Wright Laboratory Materials Directorate at Wright-Patterson Air Force Base, Ohio. This is a commercially available, whirling-arm facility that produces a 25.4 mm per h rain field and is capable of providing specimen velocities up to 290 m s - ...
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