Notching machine and method for mechanical testing specimens

Details Notching machine and method for mechanical testing specimens Notching machine and method for mechanical testing specimens

1992-04-16

1994-06-14

Myracle, Jerry W.

Measuring and testing

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

By loading of specimen

G01N 1908

Patent

active

053199839

ABSTRACT:
Notching methods and machines are provided by this invention for preparing notches in mechanical testing specimens. The notching machines razor element for creating a notch in the specimen and mechanical actuation elements for substantially linearly contacting the razor element with the specimen in a direction which is either substantially normal to the surface of the specimen receiving the notch or substantially normal to a stress created in the specimen during testing. This actuation forms a notch without any significant residual stresses forming ahead of the notch.

REFERENCES:
patent: 2340401 (1944-02-01), Martin
patent: 4090489 (1978-05-01), Barker
patent: 4864867 (1989-09-01), Manahan, Sr.
Bhattacharya, S. K. et al. Micromechanisms of crack . . . polyethylene. Journal of Materials Science. vol. 19. 1984. pp. 2519-2532.
X. Lu et al., "Notchology-The Effect of the Notching Method on the Slow Crack Growth Failure in a Tough Polyethylene", Journal of Material Science, vol. 26, pp. 881-888 (1991).
M. K. V. Chan et al., "Slow Stable Crack Growth in High Density Polyethylenes", Polymer, 1983, vol. 24, Feb., pp. 234-244.
X. Lu et al., "The Correlation of Slow Crack Growth in Linear Polyethylene by the J-Integral", Polymer, 1989, vol. 30, Dec., pp. 2215-2221.
Japanese Product Literature of a notching device (undated).

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