ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 5

Determination of the Critical Value of the J-Integral at High Loading Rates Using the Wedge-Loaded Specimen

Klepaczko, JR
Visiting Professor, Laboratoire des Sciences des Matériaux de la Mécanique,

Abstract

A novel procedure is proposed, which improves an earlier one, to determine the critical value of the J-integral at high loading rates. A more detailed analysis of such a test along with some experimental results has been published elsewhere. The present procedure is based on ASTM Test for J_Ic, a Measure of Fracture Toughness (E 813). To perform the impact test, the split Hopkinson pressure bar concept is used together with the wedge-loaded compact tension specimen (WLCT).

This paper provides a better understanding of the proposed procedure by a more accurate analysis of the frictional effects which occur between the loading wedge and the WLCT specimen. In addition, a unique procedure has been developed to measure the coefficient of Coulomb friction in the real environment of fracture K_Ic or J_Ic tests.

Keywords:
fracture dynamics, dynamic toughness testing, J-integral, split Hopkinson bar

Paper ID: JTE10979J
DOI: 10.1520/JTE10979J
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