Open Access

ARTICLE

Investigation of Stress Auto Separating Method in Digital Photo-elasticity and Its Application in Contact Problem

Ke Ji^1,2, Jinlong Chen^1,2, Lina Zhang^1,2, Xinhua Ji^1,2

1 Department of Mechanics, Tianjin University, Tianjin
2 Tianjin Key Laboratory of Modern Engineering Mechanics, Tianjin, People’s Republic of China

Structural Longevity 2010, 4(2), 77-84. https://doi.org/10.3970/sl.2010.004.077

Abstract

The stress distribution of contact area in engineering structure is complex. Automatic whole-field measurement of photo-elasticity is a feasibility method to solve the contact problem. However, the problem of isoclinic and isochromatic interaction is important in phase-shifting techniques of photo-elasticity. The technique named 8-step phase shifting technique is applied to solve the problem of isoclinic fringe pattern influenced by isochromatic fringe patterns in integer order and half-integer order. A new automatic technique of stress separation improved by an application example of contact problem of root gear, which is discussed in this paper after obtaining the whole-field shearing stress.

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Keywords

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