Small attachable interferometric strain gages
暂无分享,去创建一个
Laser-based interferometry from two tiny reflective indentations can be used to measure in-plane strain/displacement over a very short gage length (on the order of 100 μm). If the specimen material is not reflective, then some other means of generating the interference patterns must be found. This paper describes two kinds of attachable gages: plated acetate replicas of indentations and reflective foils that are indented after application. In either case, the gage is applied with the techniques used for foil-resistance gages and the gage itself is very small. The manufacturing procedures are described. The results of experiments comparing the strain to that measured with foil-resistance gages are presented. Finally, the small interferometric gage is used to measure strain on one of the metal strips in a foil-resistance gage.
[1] A technique for cyclic-plastic notch-strain measurement , 1983 .
[2] William N. Sharpe,et al. Benchmark Cyclic Plastic Notch Strain Measurements , 1983 .
[3] W. Sharpe,et al. New applications of the interferometric strain/displacement gage , 1982 .
[4] Francis Arthur Jenkins,et al. Fundamentals of Optics , 1976 .
[5] W. Sharpe,et al. Biaxial laser-based displacement transducer. , 1978, The Review of scientific instruments.