28th Congress of the International Council of the Aeronautical Sciences, 23 - 28 September 2012, Brisbane, Australia
Paper ICAS 2012-7.9.2

INVESTIGATION OF CRACK PROPAGATION BY OPTICAL INTERFEROMETRIC MEASUREMENTS OF LOCAL DEFORMATION RESPONSE

V. S. Pisarev, A. S. Dzuba, A. V. Chernov
TsAGI, Russian Federation

Keywords: stress intensity factor, t-stress, crack compliance method, electronic speckle pattern interferometry, friction stir welding

Experimental technique for a determination of stress intensity factor (SIF) and T-stress by using optical interferometric measurements of local deformation response on small crack length increment is developed. Dependencies of SIF and T-stress values from total crack length are obtained for plane FSW welded plate and FSW T-shaped joint.

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