Journal Published Online: 28 August 2014
Volume 4, Issue 2

Revised η-Factors and -CTOD Relationships for SE(B) Fracture Specimens Including 3D Effects and Implications for Fracture Toughness Measurements

CODEN: MPCACD

Abstract

This work provides revised η-factors derived from CMOD records and J-CTOD relationships applicable to estimate the J-integral and CTOD in SE(B) specimens with varying crack size and specimen configuration. Very detailed non-linear finite element analyses for plane-strain and 3D models provide the evolution of load with increased crack mouth opening displacement, which is required for the estimation procedure. The analysis matrix considers SE(B) specimens with W=2B and W=B configurations with and without side grooves covering a wide range of specimen thickness, including a precracked Charpy (PCVN) specimen. Overall, the present results provide validation of the J and CTOD evaluation procedure currently adopted by ASTM E1820-11, while at the same time giving improved estimation equations for J and CTOD incorporating 3D effects which enter directly into more accurate testing protocols for experimental measurements of fracture toughness values using 3P SE(B) specimens.

Author Information

de Souza, Rodolfo
Department of Naval Architecture and Ocean Engineering, Univ. of São Paulo, São Paulo, Brazil
Ruggieri, Claudio
Department of Naval Architecture and Ocean Engineering, Univ. of São Paulo, São Paulo, Brazil
Pages: 21
Price: $25.00
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Details
Stock #: MPC20140030
ISSN: 2165-3992
DOI: 10.1520/MPC20140030