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Y <br />D <br />SCHEMATIC OF UNTESTED SPECIMEN <br />TOP SHEET <br />WELD B WELD A <br />BOTTOM SHEET <br />DIRECTION OF INITIAL PEEL <br />TYPES OF BREAKS <br />LOCUS -OF <br />BREAK CODE BREAK DESCRIPTION CLASSIFICATIONI <br />'FTB = FILM TEAR BOND <br />AD <br />ADHESION FAILURE <br />NON—FTB <br />BRK <br />BREAK IN SHEETING. BREAK CAN BE <br />FTB <br />IN EITHER TOP OR BOTTOM SHEET <br />BREAK IN OUTER EDGE OF SEAM. <br />SE1 <br />BREAK CAN BE IN EITHER TOP OR <br />FTB <br />BOTTOM SHEET <br />SE2 <br />BREAK AT INNER EDGE OF SEAM <br />THROUGH BOTH SHEETS <br />FTB <br />BREAK IN FIRST SEAM AFTER SOME <br />AD—BRK <br />ADHESION FAILURE. BREAK CAN BE IN <br />FTB <br />EITHER THE TOP OR BOTTOM SHEET <br />'FTB = FILM TEAR BOND <br />