Experimental Studies on Thermal Strain of Aerial Laminated Glasses

Wen Mei Han; Tian He Kang; Chun Xia Xue

doi:10.4028/www.scientific.net/AMR.160-162.1659

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Experimental Studies on Thermal Strain of Aerial Laminated Glasses

Abstract:

Experimental studies on thermal strain of aerial laminated glasses by virtue of Moire Interferometry were done. The experimental results were as follows: in the U patterns of moire interference fringe, with temperature increasing, the fringes became denser and the thermal strain was augmented. In the V patterns of moire interference fringe, the sequence of the fringe patterns increased is intermediate film layer, external shielding layer and main bearing layer, respectively. The U and V fringe patterns results analyzed by digital image process system indicate that, with temperature increasing, the strain εx decreased. Because the difference of coefficients of thermal expansion of three materials is very large, the thermal strain is generated significantly, and the interlayer thermal shear strain exists in the end and intermediate position of the free boundary of the laminated glass.