An optical method for determining the crack-tip stress intensity factor

✍ Scribed by E. Sommer

• Publisher: Elsevier Science
• Year: 1970
• Tongue: English
• Weight: 780 KB
• Volume: 1
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(70)90009-3

✦ Synopsis

A simple interference method has been used to measure the opening displacement of cracks in glass plates under eccentric tension load. The results have been compared with analytical predictions from the boundary collocation method and the Westergaard analysis. Since the crack opening displacement is related analytically to the stress intensity factor. K, a K-calibration curve for the crack-line-loaded, singleedge notched plate has been established. phase difference wave length of monochromatic light in medium i index of refraction for medium i angles of incidence and refraction for interfaces K, p distance between fracture surfaces according to interference condition 7. IO5 kg/cm* 0.25 I.52 I.33 (H,O) and = 1.74 (CH,I,) 0.589 CL.