The development of improved transparent bulletproof windows by considering laminate design, interlayer bonding technologies, polymer composites, and sandwich structure is actively being researched. Sabet and Bobaru [10,11] studied the ballistic impact resistance of sandwich panels of glass/polymer laminates of vary- ing densities, and they discussed the influence of parameters such as impact energy, density, and ballistic limit. Grujicic and Gu [12,13] investigated the effect of cracks on the glass during impact. By analyzing the ballistic resistance of transparent armor glass using finite element analysis, they confirmed that flaws existing inside the glass and cracks that occurred during the cutting and grinding process promoted damage of the bulletproof material and a decrease in ballistic resistance. Rouxel and Sellappan [14,15] carried out important research on enhancing the surface cracking resis- tance for various glass compositions using standard single-edge notched bending fracture toughness measurements.