Dynamic Instability in Ice-Lifting From a Flat Road Surface Through Penetration With a Sharp Blade

[+] Author and Article Information
N. C. Huang

Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Ind. 46556

J. Appl. Mech 49(1), 187-190 (Mar 01, 1982) (4 pages) doi:10.1115/1.3161964 History: Received April 01, 1981; Revised September 01, 1981; Online July 21, 2009


This paper is concerned with the problem of dynamic instability during ice-lifting from a flat surface through penetration of the interface by means of a sharp blade. The blade is subjected to a horizontal impulsive load and a constant horizontal thrust, both applied suddenly and simultaneously. The principle of the balance of energy is used to analyze the deformation of the ice associated with the crack propagation along the interface. In our formulation, the effect of wave propagation in the ice is neglected. However, the inertia force due to the acceleration of the blade is included. The motion of the blade is investigated by the numerical solution of a complex, nonlinear, initial value problem. It is found that under a given horizontal thrust, if the initial velocity of the blade is sufficiently small, the motion of the blade may stop. However, if the initial velocity of the blade is sufficiently large, the motion of the blade is always forward and the crack can propagate indefinitely along the interface.

Copyright © 1982 by ASME
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