Measurements of restitution coefficients of ice at low temperatures

Details Measurements of restitution coefficients of ice at low temperatures Measurements of restitution coefficients of ice at low temperatures

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996p%26ss...44..917h&link_type=abstract

Planetary and Space Science, v. 44, p. 917-925.

Physics

12

Scientific paper

Measurements of the restitution coefficient (ɛ) of a smooth water ice sphere (radius = 1.5 cm) are made in a wide range of impact velocities (1 <= υi<=700 cm s-1) and temperatures (113<=T<=269K). The impact velocity dependence of ɛ is different in the quasi-elastic and inelastic regimes separated by a critical velocity (υc) at which fracture deformation occurs at the impact point of ice samples. In the quasi-elastic regime (υi<=υc), the value of ɛ is almost constant (0.88) and ice samples show no fracture deformations. In the inelastic regime (υi>υc), ɛ decreases with increasing υi and ice samples have fracture patterns. The velocity dependence of ɛ is fitted as ɛ(υi) = (υi/(υc))-log(υi/(υc)). υc is shown to increase with decreasing temperature from 25 cm s-1 (269K) to 180 cm s-1 (113-215 K).

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