| 摘要 |
PROBLEM TO BE SOLVED: To provide a durability test method for a brittle plate capable of accurately discriminating non-defective and defective articles.SOLUTION: In a durability test method for a brittle plate, a first bent part 13 that generates a tensile stress on a surface 11 of a brittle plate 10 is formed on the brittle plate 10. Through changing a position of the first bent part 13, a tensile stress is applied to a whole circumference of the surface 11 of the brittle plate 10, along a circumferential direction thereof. A second bent part 14 that generates a tensile stress on a rear face 12 of the brittle plate 10 is formed on the brittle plate 10. Through changing a position of the second bent part 14, a tensile stress is applied to a whole circumference of the rear face 12 of the brittle plate 10, along a circumferential direction thereof. |
