Autographic recorder

The compression machine is specified by reference to ISO 5893 grade 0.5 One suspects that this is an error as the 1% accuracy of grade 1 is more reasonable. The usual practice is to use a universal tensile machine in compression mode with autographic recording of force and deflection. If this is the case, care must be taken that the machine is sufficiently stiff such that the deflection reading is not significantly affected. The deflection measurement is to conform to class C of ISO 5893 which at 2% makes the force requirement overkill. 

To conduct a satisfactory Kic measurement, it is necessary to provide for autographic recording of the applied stress (or load) versus the output of a transducer... 

Polarographic measurements were carried out using the LP-60 instrument with the EZ-2 autographic recorder and with the dropping mercury electrode. For aqueous solutions a silver chloride electrode served as anode in the case of nonaqueous solutions the bottom mercury was the anode. The anode potential did not change significantly in the aqueous and nonaqueous solutions with surfactants cathode polarization was checked by means of the three-electrode circuit relative to the normal calomel electrode. 

Selbst-schreibert m. recording instrument or device, -schrift,/. autograph, -schutzmittel, n. prophylactic. 

The panel was turned upside down and simply supported near the corner, as shown in Figure 8. The steel insert plate and its surrounding area were left completely free. To counterbalance the torque which was produced when the rod was pushing down on the bracket, dead weights were put on to the top side of the panel. The load was applied continuously and the load deflection curve was recorded autographically. One transducer measured the vertical displacement of the tip of the bracket. 

The output signal, which is proportional to the average diameter of the specimen, is fed into an existing true stress-strain computer and can be read visually on a graduated dial or, when used in conjunction with load data from the testing machine, can provide an autographic curve of true stress-strain on a Baldwin MD-2 recorder. 

FIG. 18—Environmental chambers for CF in electrolytes where (a) the CT specimen is loaded horizontally and dipped Into solution [4], and (b) the CT crack is enclosed by a clamped cell and polarized potentiostatically. In part b load (P)-displacement (A) data are recorded by computer and autographically for compliance measurement of crack length and Ki. 

J. T. Dickinson and E. E. Donaldson, Autographs from peeling pressure sensitive adhesives Direct recording of fracture induced photon emission, J. Adhes. 24, 199 (1987). 

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