Measurement of contact stresses using real-time shearing interferometry

Citation
Lm. Xu et al., Measurement of contact stresses using real-time shearing interferometry, OPT ENG, 38(11), 1999, pp. 1932-1937
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICAL ENGINEERING
ISSN journal
00913286 → ACNP
Volume
38
Issue
11
Year of publication
1999
Pages
1932 - 1937
Database
ISI
SICI code
0091-3286(199911)38:11<1932:MOCSUR>2.0.ZU;2-4
Abstract
The optical method coherent gradient sensing, a real-time lateral shearing interferometry, is proposed for measuring contact stress fields under stati c and dynamic loading conditions. Feasibility of the method is first establ ished under quasi-static conditions. Under dynamic conditions, the method h as been used in conjunction with high-speed photography. The interference p atterns representing stress gradients are used for extracting impact load h istory. Loading rates of approximately 14 MN/sec have been observed. The op tical measurements are compared with the computed values obtained using fin ite element simulations. (C) 1999 Society of Photo-Optical Instrumentation Engineers. [S00913286(99)01811-5].