Multiple sample automated cut growth analysis

Details Multiple sample automated cut growth analysis Multiple sample automated cut growth analysis

1989-04-21

1990-03-27

Myracle, Jerry W.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

73809, G01N 1908

Patent

active

049110179

ABSTRACT:
A sample (16) with a cut (18) is mounted by clamps (14) between a stationary bar (10) and a movable bar (12). A motor driven cam (22) reciprocates the movable bar causing the samples to undergo cyclic deformation. A camera (C) is selectively positionable (B) to view each of the plurality of samples. A computer control (D) determines a cut length (60, 62, 64, 66) from each two dimensional electronic video image representation and stores it in a cut data memory (68). The next sampling time for each sample is calculated (72) generally in proportion to an inverse of the cut growth rate. The sampling order is re-ordered after each measurement and stored in a queuing table (78). A driver circuit (86) causes a motor (40) to position the camera in the appropriate positions to image the samples in the order indicated by the queuing table.

REFERENCES:
patent: 3803907 (1974-04-01), Ryckman et al.
patent: 3918299 (1975-11-01), Donnadieu
patent: 3983745 (1976-10-01), Juusola
patent: 4003246 (1977-01-01), Cain
patent: 4175447 (1979-11-01), Fukuhara
patent: 4418563 (1983-12-01), Kalthoff et al.
patent: 4574642 (1986-03-01), Fleischman
Production of Maximum Sharpeness Stress Concentration Notches in Cylindrical Specimens by Burnos, et al., Zav. Lab., vol. 38, No. 2, p. 242 (2/72).

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