Abstract
AbstractA simple photographic method for measuring the slow crack growth in transparent polymer film is described. Framing speeds up to 100 per second have been achieved. Experimental data for a cellulose film with centrally located initial cuts indicate that for 0 < t < 0.8tb, the crack length c increases with time t according to where c0 is the initial cut size, K a constant, and tb the time to fracture.
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