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090			_aB-12571
245	1	0	_aActual Light Deflections in Regions of Crack Tips and Their Influence on Measurements in Photomechanics
490	0		_vOptics and Lasers in Engineering, 22(4-5), p.325-345, 1995
520	3		_aCrack-tip photomechanics procedures are based on certain simplifying assumptions that are seldom discussed. In a recent paper the theoretical bases of the shadow optical methods of caustics have been analysed and tested using the results obtained by three analytical-experimental procedures, namely classical strain gage techniques, isodynes, and strain-gradient index method. It has been concluded that the straingradient index method appears to be a suitable tool for analysis of stress states near crack tips and notches and, in particular, for testing the predictive power of the pertinent singular solutions of the linear elastic fracture mechanics and the ranges of their applicability. In the present paper, a more detailed analysis of all results obtained in light deflection experiments allows to quantify the contribution of both involved effects and to determine the distortion of the faces of the investigated plates along their crack planes. The ability of the strain-gradient light bending method to analyse some features of the three-dimensional stress-state is reported. Finally, the presented experimental evidence allows to draw conclusions related to limits of applicability of certain photomechanical measurements near crack tips.
700	1	2	_aHecker, F.W.
700	1	2	_aPindera, J.T.
700	1	2	_aWen, B.
856	4	0	_uhttps://drive.google.com/file/d/1fKeXIGUartnzTChBk1yjA6u7RCltLH0p/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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