Frictional Behavior of Nylons

Anomalous Frictional Behavior in Collisions of Thin

We report collision experiments with Delrin disks and a steel plate. The disks floated air table, and collided at low speeds with a thick plate clamped to the table. The collisio was varied. The observed normal restitution was consistent with other studies. The fri interaction di ered from that reported for spheres and thick disks, and from predict standard rigid-body collision models. For ‘sli...

Laboratory investigation of the frictional behavior of granular volcanic material

We report on detailed laboratory experiments designed to illustrate the frictional behavior of granular volcanic debris. The materials include pyroclastic flow debris from Soufrière Hills Volcano, Montserrat, and from Stromboli Volcano, Italy, and lahar deposits from Mount St. Helens. Experiments were conducted in a servo-controlled, double-direct shear apparatus under conditions of displacemen...

The Frictional Behavior of Thin Halide Films on Iron

Frictional behavior and surface failure of acrylic denture teeth.

The water characteristics of acrylic denture teeth were investigated under single- and double-pass sliding. The response of acrylic teeth to sliding was that of a relatively ductile material. The wear characteristics were affected similarly by environments of water and saliva. The "enamel" surfaces showed more resistance to penetration and were less susceptible to surface damage than the "denti...

Anomalous Frictional Behavior in Collisions of Thin Disks

We report on 2D collision experiments with 9 thin Delrin disks with variable axisymmetric mass distributions. The disks floated on an air table, and collided at speeds of about 0.5 to 1.0 m/s with a flat-walled stationary thick steel plate clamped to the table. The collision angle was varied. The observed normal restitution was roughly independent of angle, consistent with other studies. The fr...