A method of measuring the maximum dynamic stress concentration factor α
Dmax in a fillet has not yet established. The reflection and transmission of stress wave during the propagation through a fillet result in complex stress states. We propose a new method for analyzing the maximum dynamic stress concentration factor α
Dmax in a fillet utilizing the stress concentration factor α
S and the reflection coefficient A obtained by a strain gauge on the incident strip plate. In this experiment, a square wave(a stress wave with a plateau of constant stress for long duration)is used. A strain gauge measures the reflection coefficient A. The factor α
Dmax in the fillet is analyzed using a dynamic photoelastic method. It is confirmed that α
Dmax is approximated by the following equation:α
exDmax=(1+A)α
S. As a result, the maximum dynamic stress concentration factor is obtained experimentally using the static stress concentration factor and the reflection coefficient.
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