Photoelastic studies of the two-dimensional dynamic stress-optic law
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Studies of the two-dimensional dynamic stress-optic law were made using Castolite circular disks under diametral impact load. The dynamic stress-fringe relationship of Castolite was found to be approximately linear. The dynamic fringe values were slightly lower than the static values. In four of the five specimens used the maximum difference was 8.2 percent. Previous work on the dynamic stress-optic calibration was limited to cases of one-dimensional stress.
A new dual-beam cathode ray oscilloscope and two dualtrace plug-in preamplifiers were adapted for this work. Taking advantage of symmetry, three strain components at an arbitrary point in the disk and the birefringence at the symmetrical point were recorded in one photograph during a single impact.
KeywordsMechanical Engineer Fluid Dynamics Maximum Difference Arbitrary Point Impact Load
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