Effect of Pulse Shape on Spall Strength


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Abstract

This paper analyzes the effect of the time-dependent shape of a load pulse on the spall strength of materials. Within the framework of a classical one-dimensional scheme, triangular pulses with signal rise and decay portions and with no signal rise portions considered. Calculation results for the threshold characteristics of fracture for rail steel are given. The possibility of optimization of fracture by selecting a loading time with the use of an introduced characteristic of dynamic strength (pulse fracture capacity) is demonstrated. The study is carried out using a structure–time fracture criterion.

About the authors

V. I. Smirnov

Emperor Alexander I St. Petersburg State Transport University

Author for correspondence.
Email: vsmirnov1@gmail.com
Russian Federation, St. Petersburg, 198103

Yu. V. Petrov

Institute of Problems of Mechanical Engineering

Email: vsmirnov1@gmail.com
Russian Federation, St. Petersburg, 199178

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