On the dynamic characteristics of radial-axial ring rolling processes

Article Abstract:

A model is developed for the dynamic characteristics of the radial-axial ring rolling process. These characteristics include the dynamics of the hydraulic system, rolling forces of pressure roll and conical roll and the growing motions of rolled ring. The model also takes into account the yield shear stress variation caused by the temperature change in the rolled ring. The model was verified through experiments and computer simulation and good agreement was observed.

Rolling (Metalworking), Rolling (Metalwork)

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Dynamic peripheral milling of flexible structures

Article Abstract:

A dynamic model is developed for the peripheral milling of a flexible cantilevered-free free-free plate. The finite element method was used to reduce the model into the tool-workpiece contact zone. The model estimates the surface finish form, plate displacements at the tool-workpiece contact zone and cutting forces. Results show that for large cutting loads, the plate detaches from the cutter because of the static loads at the lower portion of the plate.

Plates (Engineering), Metal plates (Building materials), Structural dynamics, Milling (Metalwork), Milling (Metals)

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Flexible membrane liners

Article Abstract:

Usage of textured flexible membrane liners (FMLs) helps in mitigating instability in landfill slopes in the designing of landfill closure systems. Among other things, usage of textured FMLs provides for greater interfacial friction angles without compromising on impermeability.

Planning, Innovations, Sanitary landfills, Membranes (Technology), Fills (Earthwork)

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