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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-472-4

ISBN Online: 978-1-56700-471-7

3rd Thermal and Fluids Engineering Conference (TFEC)
March, 4–7, 2018, Fort Lauderdale, FL, USA

Evaluation of Wear Damage During a High Speed Scenario

Get access (open in a dialog) pages 1321-1340
DOI: 10.1615/TFEC2018.htt.021830

Аннотация

This paper discusses wear as it relates to the high speed movement of a vehicle along a rigid support in which friction becomes a source for material deformation. A good example of this type of condition occurs within the USAF Holloman High Speed Test Track (HHSTT) at Alamogordo New Mexico. The HHSTT supports experiments which routinely test at hypersonic speeds. In addition, there are several applications including rail guns, high speed trains, and hypervelocity projectile research. For this research, the application is the setup at the Holloman High Speed Test Track. The testing involves articles propelled at high velocities, in excess of Mach 8, while attached to a rail by way of wrap around slippers. The loss or failure of a slipper due to wear would lead to a catastrophic event resulting in loss of unique test articles. Modeling the entire test run would be computationally expensive due to thermal-mechanical coupling and non-linearities in geometry as well as material. This work utilizes a nite element model to simulate the slipper interaction with the rail while in contact as well as the differing pressures experienced by the slipper as it travels down the track. It takes into account boundary conditions from a validated rocket sled model that includes vertical accelerations and horizontal velocities. The initial thermal environment was approximated by use of a one-dimensional heat transfer model which simulated an entire test run based on thermal uxes developed through friction.