Low-cost Dynamic Photoelasticity

Photoelasticity is the photomechanics tool that introduces engineers to whole field optical stress analysis. However, only static experiments are demonstrated due to expense and complexity of dynamic photoelastic systems. The rapid growth in low-cost, pulsed light sources and advances in digital imaging have made it possible to develop systems that are more accessible and affordable for demonstrating dynamic stress visualization and analysis.1-5 The main components in a dynamic visualization setup are the illumination and recording systems coupled to the event under study by a trigger mechanism. Illumination sources are either high voltage unwieldy multiple spark gap systems or expensive and moody pulsed laser sources. The recording system can be a stationary film or a complex moving film system. The whole system cost is very high and system setup is time consuming.

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