October 23, 2013

Vicky Rebar Lite Tech Inc.

SUBJECT: miniDeMattia Testing for Ten Sheets

EXECUTIVE SUMMARY:

Page 2 of 15 PN 109620

The purpose of this work was to characterize ten sheets (x-ray protection garment materials) using miniDeMattia flex tester. The work determined the onset of surface cracking, surface crack growth rate, and full rupture (hole formation).

TABLE OF CONTENTS: SUBJECT: ............................................................................................................................................ 2 EXECUTIVE SUMMARY: ..................................................................................................................... 2 TABLE OF CONTENTS: ...................................................................................................................... 2 LIST OF TABLES: ............................................................................................................................... 2 LIST OF FIGURES: .............................................................................................................................. 2 PURPOSE AND SCOPE: .................................................................................................................... 2 BACKGROUND: .................................................................................................................................. 3 EXPERIMENTAL TECHNIQUES: ........................................................................................................ 3 RESULTS: ............................................................................................................................................ 4

LIST OF TABLES: Table 1: List of Materials ...................................................................................................................... 3

LIST OF FIGURES: Figure 1: Sample 1 ( ) Crack Length as a Function of Cycles ................... 4 Figure 2: Sample 2 ( ) Crack Length as a Function of Cycles ................ 5 Figure 3: Sample 3 (Lite Tech B3E 0.125 mm Pb) Crack Length as a Function of Cycles ................... 5 Figure 4: Sample 4 (Lite Tech TBE 40 0.125mm Pb) Crack Length as a Function of Cycles ............... 6 Figure 5: Sample 5 (Lite Tech TBE 36 0.125mm Pb) Crack Length as a Function of Cycles ............... 6 Figure 6: Sample 6 (Lite Tech TBF 0.125mm Pb) Crack Length as a Function of Cycles .................... 7 Figure 7: Sample 7 (Lite Tech TBE 33.3 0.125 mm Pb) Crack Length as a Function of Cycles ........... 7 Figure 8: Sample 8 (Lite Tech NLE 0.175 mm Pb) Crack Length as a Function of Cycles ................... 8 Figure 9: Sample 9 ( ) Crack Length as a Function of Cycles ................... 8 Figure 10: Sample 10 ( ) Crack Length as a Function of Cycles .......... 9 Figure 11: Surface Crack Growth Rate Results (MD and CD) ............................................................ 10 Figure 12: Surface Crack Growth Rate Results .................................................................................. 11 Figure 13: Onset of Surface Cracks (MD and CD) ............................................................................. 12 Figure 14: Onset of Surface Cracks ................................................................................................... 13 Figure 15: Full Rupture (Hole Formation) (MD and CD) ..................................................................... 14 Figure 16: Full Rupture (Hole Formation) ........................................................................................... 15

PURPOSE AND SCOPE: The purpose of this work was to characterize ten sheets (x-ray protection garment materials) using miniDeMattia flex tester. The work determined the onset of surface cracking, surface crack growth rate, and full rupture (hole formation).