Single Specimen Tests for Determination

GA Clarke; WR Andrews; PC Paris; DW Schmidt

doi:10.1520/STP33937S

SYMPOSIA PAPER Published: 01 January 1976

STP33937S

Single Specimen Tests for Determination

Source

A J_Ic test procedure using a single deeply cracked specimen is proposed. The crack extension is measured by partially unloading the specimen to determine the elastic compliance. J_Ic tests were made using ASTM A469 steel. Compact specimens from 1/2T to 5T were tested. No size effect was found. Results from two independent laboratories are presented and are in agreement. The errors due to simple formulation of J_I calculation, periodic partial unloading, and simplified analysis for the extension of deep cracks in compact specimens are explored. The measurement point of crack extension for establishing J_Ic is discussed. The results indicate that a practical and effective single specimen test procedure has been developed.

Author Information

Clarke, GA

General Electric Company, Schenectady, N. Y.

Andrews, WR

General Electric Company, Schenectady, N. Y.

Paris, PC

Brown University, Providence, R. I.

Schmidt, DW

Del Research Corporation, Hellertown, Pa.

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Details

Developed by Committee: E08

Pages: 27–42

DOI: 10.1520/STP33937S

ISBN-EB: 978-0-8031-4669-3

ISBN-13: 978-0-8031-0509-6

Single Specimen Tests for Determination

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